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authorLinus Torvalds <torvalds@linux-foundation.org>2010-03-03 07:34:18 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2010-03-03 07:34:18 -0800
commit0a135ba14d71fb84c691a5386aff5049691fe6d7 (patch)
treeadb1de887dd6839d69d2fc16ffa2a10ff63298fa
parent4850f524b2c4c8a4e9f8ef4dd9c7c4afde2f2b2c (diff)
parenta29d8b8e2d811a24bbe49215a0f0c536b72ebc18 (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu: percpu: add __percpu sparse annotations to what's left percpu: add __percpu sparse annotations to fs percpu: add __percpu sparse annotations to core kernel subsystems local_t: Remove leftover local.h this_cpu: Remove pageset_notifier this_cpu: Page allocator conversion percpu, x86: Generic inc / dec percpu instructions local_t: Move local.h include to ringbuffer.c and ring_buffer_benchmark.c module: Use this_cpu_xx to dynamically allocate counters local_t: Remove cpu_local_xx macros percpu: refactor the code in pcpu_[de]populate_chunk() percpu: remove compile warnings caused by __verify_pcpu_ptr() percpu: make accessors check for percpu pointer in sparse percpu: add __percpu for sparse. percpu: make access macros universal percpu: remove per_cpu__ prefix.
-rw-r--r--arch/alpha/include/asm/local.h17
-rw-r--r--arch/blackfin/mach-common/entry.S4
-rw-r--r--arch/cris/arch-v10/kernel/entry.S2
-rw-r--r--arch/cris/arch-v32/mm/mmu.S2
-rw-r--r--arch/ia64/include/asm/percpu.h4
-rw-r--r--arch/ia64/kernel/ia64_ksyms.c4
-rw-r--r--arch/ia64/mm/discontig.c2
-rw-r--r--arch/m32r/include/asm/local.h25
-rw-r--r--arch/microblaze/include/asm/entry.h2
-rw-r--r--arch/mips/include/asm/local.h25
-rw-r--r--arch/parisc/lib/fixup.S8
-rw-r--r--arch/powerpc/include/asm/local.h25
-rw-r--r--arch/sparc/kernel/nmi.c7
-rw-r--r--arch/sparc/kernel/rtrap_64.S8
-rw-r--r--arch/x86/include/asm/local.h37
-rw-r--r--arch/x86/include/asm/percpu.h119
-rw-r--r--arch/x86/include/asm/system.h8
-rw-r--r--arch/x86/kernel/apic/nmi.c6
-rw-r--r--arch/x86/kernel/head_32.S6
-rw-r--r--arch/x86/kernel/vmlinux.lds.S4
-rw-r--r--arch/x86/xen/xen-asm_32.S4
-rw-r--r--crypto/cryptd.c2
-rw-r--r--drivers/acpi/processor_perflib.c2
-rw-r--r--drivers/dma/dmaengine.c2
-rw-r--r--drivers/edac/amd64_edac.c2
-rw-r--r--drivers/md/raid5.c2
-rw-r--r--drivers/md/raid5.h2
-rw-r--r--fs/ext4/ext4.h2
-rw-r--r--fs/nfs/iostat.h4
-rw-r--r--fs/xfs/xfs_mount.h2
-rw-r--r--include/acpi/processor.h2
-rw-r--r--include/asm-generic/local.h19
-rw-r--r--include/asm-generic/percpu.h18
-rw-r--r--include/linux/blktrace_api.h4
-rw-r--r--include/linux/compiler.h2
-rw-r--r--include/linux/dmaengine.h2
-rw-r--r--include/linux/genhd.h2
-rw-r--r--include/linux/kexec.h2
-rw-r--r--include/linux/mm.h4
-rw-r--r--include/linux/mmzone.h12
-rw-r--r--include/linux/module.h37
-rw-r--r--include/linux/mount.h2
-rw-r--r--include/linux/nfs_fs_sb.h2
-rw-r--r--include/linux/percpu-defs.h40
-rw-r--r--include/linux/percpu.h44
-rw-r--r--include/linux/percpu_counter.h2
-rw-r--r--include/linux/srcu.h2
-rw-r--r--include/linux/vmstat.h8
-rw-r--r--kernel/kexec.c2
-rw-r--r--kernel/module.c29
-rw-r--r--kernel/rcutorture.c8
-rw-r--r--kernel/sched.c4
-rw-r--r--kernel/stop_machine.c2
-rw-r--r--kernel/trace/ring_buffer.c1
-rw-r--r--kernel/trace/ring_buffer_benchmark.c1
-rw-r--r--kernel/trace/trace.c6
-rw-r--r--kernel/trace/trace_functions_graph.c4
-rw-r--r--mm/page_alloc.c202
-rw-r--r--mm/percpu.c36
-rw-r--r--mm/vmstat.c15
60 files changed, 354 insertions, 499 deletions
diff --git a/arch/alpha/include/asm/local.h b/arch/alpha/include/asm/local.h
index 6ad3ea696421..b9e3e3318371 100644
--- a/arch/alpha/include/asm/local.h
+++ b/arch/alpha/include/asm/local.h
@@ -98,21 +98,4 @@ static __inline__ long local_sub_return(long i, local_t * l)
#define __local_add(i,l) ((l)->a.counter+=(i))
#define __local_sub(i,l) ((l)->a.counter-=(i))
-/* Use these for per-cpu local_t variables: on some archs they are
- * much more efficient than these naive implementations. Note they take
- * a variable, not an address.
- */
-#define cpu_local_read(l) local_read(&__get_cpu_var(l))
-#define cpu_local_set(l, i) local_set(&__get_cpu_var(l), (i))
-
-#define cpu_local_inc(l) local_inc(&__get_cpu_var(l))
-#define cpu_local_dec(l) local_dec(&__get_cpu_var(l))
-#define cpu_local_add(i, l) local_add((i), &__get_cpu_var(l))
-#define cpu_local_sub(i, l) local_sub((i), &__get_cpu_var(l))
-
-#define __cpu_local_inc(l) __local_inc(&__get_cpu_var(l))
-#define __cpu_local_dec(l) __local_dec(&__get_cpu_var(l))
-#define __cpu_local_add(i, l) __local_add((i), &__get_cpu_var(l))
-#define __cpu_local_sub(i, l) __local_sub((i), &__get_cpu_var(l))
-
#endif /* _ALPHA_LOCAL_H */
diff --git a/arch/blackfin/mach-common/entry.S b/arch/blackfin/mach-common/entry.S
index b0ed0b487ff2..01b2f58dfb95 100644
--- a/arch/blackfin/mach-common/entry.S
+++ b/arch/blackfin/mach-common/entry.S
@@ -816,8 +816,8 @@ ENDPROC(_resume)
ENTRY(_ret_from_exception)
#ifdef CONFIG_IPIPE
- p2.l = _per_cpu__ipipe_percpu_domain;
- p2.h = _per_cpu__ipipe_percpu_domain;
+ p2.l = _ipipe_percpu_domain;
+ p2.h = _ipipe_percpu_domain;
r0.l = _ipipe_root;
r0.h = _ipipe_root;
r2 = [p2];
diff --git a/arch/cris/arch-v10/kernel/entry.S b/arch/cris/arch-v10/kernel/entry.S
index 2c18d08cd913..c52bef39e250 100644
--- a/arch/cris/arch-v10/kernel/entry.S
+++ b/arch/cris/arch-v10/kernel/entry.S
@@ -358,7 +358,7 @@ mmu_bus_fault:
1: btstq 12, $r1 ; Refill?
bpl 2f
lsrq 24, $r1 ; Get PGD index (bit 24-31)
- move.d [per_cpu__current_pgd], $r0 ; PGD for the current process
+ move.d [current_pgd], $r0 ; PGD for the current process
move.d [$r0+$r1.d], $r0 ; Get PMD
beq 2f
nop
diff --git a/arch/cris/arch-v32/mm/mmu.S b/arch/cris/arch-v32/mm/mmu.S
index 2238d154bde3..f125d912e140 100644
--- a/arch/cris/arch-v32/mm/mmu.S
+++ b/arch/cris/arch-v32/mm/mmu.S
@@ -115,7 +115,7 @@
#ifdef CONFIG_SMP
move $s7, $acr ; PGD
#else
- move.d per_cpu__current_pgd, $acr ; PGD
+ move.d current_pgd, $acr ; PGD
#endif
; Look up PMD in PGD
lsrq 24, $r0 ; Get PMD index into PGD (bit 24-31)
diff --git a/arch/ia64/include/asm/percpu.h b/arch/ia64/include/asm/percpu.h
index 30cf46534dd2..f7c00a5e0e2b 100644
--- a/arch/ia64/include/asm/percpu.h
+++ b/arch/ia64/include/asm/percpu.h
@@ -9,7 +9,7 @@
#define PERCPU_ENOUGH_ROOM PERCPU_PAGE_SIZE
#ifdef __ASSEMBLY__
-# define THIS_CPU(var) (per_cpu__##var) /* use this to mark accesses to per-CPU variables... */
+# define THIS_CPU(var) (var) /* use this to mark accesses to per-CPU variables... */
#else /* !__ASSEMBLY__ */
@@ -39,7 +39,7 @@ extern void *per_cpu_init(void);
* On the positive side, using __ia64_per_cpu_var() instead of __get_cpu_var() is slightly
* more efficient.
*/
-#define __ia64_per_cpu_var(var) per_cpu__##var
+#define __ia64_per_cpu_var(var) var
#include <asm-generic/percpu.h>
diff --git a/arch/ia64/kernel/ia64_ksyms.c b/arch/ia64/kernel/ia64_ksyms.c
index 461b99902bf6..7f4a0ed24152 100644
--- a/arch/ia64/kernel/ia64_ksyms.c
+++ b/arch/ia64/kernel/ia64_ksyms.c
@@ -30,9 +30,9 @@ EXPORT_SYMBOL(max_low_pfn); /* defined by bootmem.c, but not exported by generic
#endif
#include <asm/processor.h>
-EXPORT_SYMBOL(per_cpu__ia64_cpu_info);
+EXPORT_SYMBOL(ia64_cpu_info);
#ifdef CONFIG_SMP
-EXPORT_SYMBOL(per_cpu__local_per_cpu_offset);
+EXPORT_SYMBOL(local_per_cpu_offset);
#endif
#include <asm/uaccess.h>
diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c
index 19c4b2195dce..8d586d1e2515 100644
--- a/arch/ia64/mm/discontig.c
+++ b/arch/ia64/mm/discontig.c
@@ -459,7 +459,7 @@ static void __init initialize_pernode_data(void)
cpu = 0;
node = node_cpuid[cpu].nid;
cpu0_cpu_info = (struct cpuinfo_ia64 *)(__phys_per_cpu_start +
- ((char *)&per_cpu__ia64_cpu_info - __per_cpu_start));
+ ((char *)&ia64_cpu_info - __per_cpu_start));
cpu0_cpu_info->node_data = mem_data[node].node_data;
}
#endif /* CONFIG_SMP */
diff --git a/arch/m32r/include/asm/local.h b/arch/m32r/include/asm/local.h
index 22256d138630..734bca87018a 100644
--- a/arch/m32r/include/asm/local.h
+++ b/arch/m32r/include/asm/local.h
@@ -338,29 +338,4 @@ static inline void local_set_mask(unsigned long mask, local_t *addr)
* a variable, not an address.
*/
-/* Need to disable preemption for the cpu local counters otherwise we could
- still access a variable of a previous CPU in a non local way. */
-#define cpu_local_wrap_v(l) \
- ({ local_t res__; \
- preempt_disable(); \
- res__ = (l); \
- preempt_enable(); \
- res__; })
-#define cpu_local_wrap(l) \
- ({ preempt_disable(); \
- l; \
- preempt_enable(); }) \
-
-#define cpu_local_read(l) cpu_local_wrap_v(local_read(&__get_cpu_var(l)))
-#define cpu_local_set(l, i) cpu_local_wrap(local_set(&__get_cpu_var(l), (i)))
-#define cpu_local_inc(l) cpu_local_wrap(local_inc(&__get_cpu_var(l)))
-#define cpu_local_dec(l) cpu_local_wrap(local_dec(&__get_cpu_var(l)))
-#define cpu_local_add(i, l) cpu_local_wrap(local_add((i), &__get_cpu_var(l)))
-#define cpu_local_sub(i, l) cpu_local_wrap(local_sub((i), &__get_cpu_var(l)))
-
-#define __cpu_local_inc(l) cpu_local_inc(l)
-#define __cpu_local_dec(l) cpu_local_dec(l)
-#define __cpu_local_add(i, l) cpu_local_add((i), (l))
-#define __cpu_local_sub(i, l) cpu_local_sub((i), (l))
-
#endif /* __M32R_LOCAL_H */
diff --git a/arch/microblaze/include/asm/entry.h b/arch/microblaze/include/asm/entry.h
index 61abbd232640..ec89f2ad0fe1 100644
--- a/arch/microblaze/include/asm/entry.h
+++ b/arch/microblaze/include/asm/entry.h
@@ -21,7 +21,7 @@
* places
*/
-#define PER_CPU(var) per_cpu__##var
+#define PER_CPU(var) var
# ifndef __ASSEMBLY__
DECLARE_PER_CPU(unsigned int, KSP); /* Saved kernel stack pointer */
diff --git a/arch/mips/include/asm/local.h b/arch/mips/include/asm/local.h
index 361f4f16c30c..bdcdef02d147 100644
--- a/arch/mips/include/asm/local.h
+++ b/arch/mips/include/asm/local.h
@@ -193,29 +193,4 @@ static __inline__ long local_sub_return(long i, local_t * l)
#define __local_add(i, l) ((l)->a.counter+=(i))
#define __local_sub(i, l) ((l)->a.counter-=(i))
-/* Need to disable preemption for the cpu local counters otherwise we could
- still access a variable of a previous CPU in a non atomic way. */
-#define cpu_local_wrap_v(l) \
- ({ local_t res__; \
- preempt_disable(); \
- res__ = (l); \
- preempt_enable(); \
- res__; })
-#define cpu_local_wrap(l) \
- ({ preempt_disable(); \
- l; \
- preempt_enable(); }) \
-
-#define cpu_local_read(l) cpu_local_wrap_v(local_read(&__get_cpu_var(l)))
-#define cpu_local_set(l, i) cpu_local_wrap(local_set(&__get_cpu_var(l), (i)))
-#define cpu_local_inc(l) cpu_local_wrap(local_inc(&__get_cpu_var(l)))
-#define cpu_local_dec(l) cpu_local_wrap(local_dec(&__get_cpu_var(l)))
-#define cpu_local_add(i, l) cpu_local_wrap(local_add((i), &__get_cpu_var(l)))
-#define cpu_local_sub(i, l) cpu_local_wrap(local_sub((i), &__get_cpu_var(l)))
-
-#define __cpu_local_inc(l) cpu_local_inc(l)
-#define __cpu_local_dec(l) cpu_local_dec(l)
-#define __cpu_local_add(i, l) cpu_local_add((i), (l))
-#define __cpu_local_sub(i, l) cpu_local_sub((i), (l))
-
#endif /* _ARCH_MIPS_LOCAL_H */
diff --git a/arch/parisc/lib/fixup.S b/arch/parisc/lib/fixup.S
index d172d4245cdc..f8c45cc2947d 100644
--- a/arch/parisc/lib/fixup.S
+++ b/arch/parisc/lib/fixup.S
@@ -36,8 +36,8 @@
#endif
/* t2 = &__per_cpu_offset[smp_processor_id()]; */
LDREGX \t2(\t1),\t2
- addil LT%per_cpu__exception_data,%r27
- LDREG RT%per_cpu__exception_data(%r1),\t1
+ addil LT%exception_data,%r27
+ LDREG RT%exception_data(%r1),\t1
/* t1 = &__get_cpu_var(exception_data) */
add,l \t1,\t2,\t1
/* t1 = t1->fault_ip */
@@ -46,8 +46,8 @@
#else
.macro get_fault_ip t1 t2
/* t1 = &__get_cpu_var(exception_data) */
- addil LT%per_cpu__exception_data,%r27
- LDREG RT%per_cpu__exception_data(%r1),\t2
+ addil LT%exception_data,%r27
+ LDREG RT%exception_data(%r1),\t2
/* t1 = t2->fault_ip */
LDREG EXCDATA_IP(\t2), \t1
.endm
diff --git a/arch/powerpc/include/asm/local.h b/arch/powerpc/include/asm/local.h
index ce58c80e1bcf..c2410af6bfd9 100644
--- a/arch/powerpc/include/asm/local.h
+++ b/arch/powerpc/include/asm/local.h
@@ -172,29 +172,4 @@ static __inline__ long local_dec_if_positive(local_t *l)
#define __local_add(i,l) ((l)->a.counter+=(i))
#define __local_sub(i,l) ((l)->a.counter-=(i))
-/* Need to disable preemption for the cpu local counters otherwise we could
- still access a variable of a previous CPU in a non atomic way. */
-#define cpu_local_wrap_v(l) \
- ({ local_t res__; \
- preempt_disable(); \
- res__ = (l); \
- preempt_enable(); \
- res__; })
-#define cpu_local_wrap(l) \
- ({ preempt_disable(); \
- l; \
- preempt_enable(); }) \
-
-#define cpu_local_read(l) cpu_local_wrap_v(local_read(&__get_cpu_var(l)))
-#define cpu_local_set(l, i) cpu_local_wrap(local_set(&__get_cpu_var(l), (i)))
-#define cpu_local_inc(l) cpu_local_wrap(local_inc(&__get_cpu_var(l)))
-#define cpu_local_dec(l) cpu_local_wrap(local_dec(&__get_cpu_var(l)))
-#define cpu_local_add(i, l) cpu_local_wrap(local_add((i), &__get_cpu_var(l)))
-#define cpu_local_sub(i, l) cpu_local_wrap(local_sub((i), &__get_cpu_var(l)))
-
-#define __cpu_local_inc(l) cpu_local_inc(l)
-#define __cpu_local_dec(l) cpu_local_dec(l)
-#define __cpu_local_add(i, l) cpu_local_add((i), (l))
-#define __cpu_local_sub(i, l) cpu_local_sub((i), (l))
-
#endif /* _ARCH_POWERPC_LOCAL_H */
diff --git a/arch/sparc/kernel/nmi.c b/arch/sparc/kernel/nmi.c
index d242a7340541..b287b62c7ea3 100644
--- a/arch/sparc/kernel/nmi.c
+++ b/arch/sparc/kernel/nmi.c
@@ -21,7 +21,6 @@
#include <asm/perf_event.h>
#include <asm/ptrace.h>
-#include <asm/local.h>
#include <asm/pcr.h>
/* We don't have a real NMI on sparc64, but we can fake one
@@ -113,13 +112,13 @@ notrace __kprobes void perfctr_irq(int irq, struct pt_regs *regs)
touched = 1;
}
if (!touched && __get_cpu_var(last_irq_sum) == sum) {
- __this_cpu_inc(per_cpu_var(alert_counter));
- if (__this_cpu_read(per_cpu_var(alert_counter)) == 30 * nmi_hz)
+ __this_cpu_inc(alert_counter);
+ if (__this_cpu_read(alert_counter) == 30 * nmi_hz)
die_nmi("BUG: NMI Watchdog detected LOCKUP",
regs, panic_on_timeout);
} else {
__get_cpu_var(last_irq_sum) = sum;
- __this_cpu_write(per_cpu_var(alert_counter), 0);
+ __this_cpu_write(alert_counter, 0);
}
if (__get_cpu_var(wd_enabled)) {
write_pic(picl_value(nmi_hz));
diff --git a/arch/sparc/kernel/rtrap_64.S b/arch/sparc/kernel/rtrap_64.S
index fd3cee4d117c..1ddec403f512 100644
--- a/arch/sparc/kernel/rtrap_64.S
+++ b/arch/sparc/kernel/rtrap_64.S
@@ -149,11 +149,11 @@ rtrap_nmi: ldx [%sp + PTREGS_OFF + PT_V9_TSTATE], %l1
rtrap_irq:
rtrap:
#ifndef CONFIG_SMP
- sethi %hi(per_cpu____cpu_data), %l0
- lduw [%l0 + %lo(per_cpu____cpu_data)], %l1
+ sethi %hi(__cpu_data), %l0
+ lduw [%l0 + %lo(__cpu_data)], %l1
#else
- sethi %hi(per_cpu____cpu_data), %l0
- or %l0, %lo(per_cpu____cpu_data), %l0
+ sethi %hi(__cpu_data), %l0
+ or %l0, %lo(__cpu_data), %l0
lduw [%l0 + %g5], %l1
#endif
cmp %l1, 0
diff --git a/arch/x86/include/asm/local.h b/arch/x86/include/asm/local.h
index 47b9b6f19057..2e9972468a5d 100644
--- a/arch/x86/include/asm/local.h
+++ b/arch/x86/include/asm/local.h
@@ -195,41 +195,4 @@ static inline long local_sub_return(long i, local_t *l)
#define __local_add(i, l) local_add((i), (l))
#define __local_sub(i, l) local_sub((i), (l))
-/* Use these for per-cpu local_t variables: on some archs they are
- * much more efficient than these naive implementations. Note they take
- * a variable, not an address.
- *
- * X86_64: This could be done better if we moved the per cpu data directly
- * after GS.
- */
-
-/* Need to disable preemption for the cpu local counters otherwise we could
- still access a variable of a previous CPU in a non atomic way. */
-#define cpu_local_wrap_v(l) \
-({ \
- local_t res__; \
- preempt_disable(); \
- res__ = (l); \
- preempt_enable(); \
- res__; \
-})
-#define cpu_local_wrap(l) \
-({ \
- preempt_disable(); \
- (l); \
- preempt_enable(); \
-}) \
-
-#define cpu_local_read(l) cpu_local_wrap_v(local_read(&__get_cpu_var((l))))
-#define cpu_local_set(l, i) cpu_local_wrap(local_set(&__get_cpu_var((l)), (i)))
-#define cpu_local_inc(l) cpu_local_wrap(local_inc(&__get_cpu_var((l))))
-#define cpu_local_dec(l) cpu_local_wrap(local_dec(&__get_cpu_var((l))))
-#define cpu_local_add(i, l) cpu_local_wrap(local_add((i), &__get_cpu_var((l))))
-#define cpu_local_sub(i, l) cpu_local_wrap(local_sub((i), &__get_cpu_var((l))))
-
-#define __cpu_local_inc(l) cpu_local_inc((l))
-#define __cpu_local_dec(l) cpu_local_dec((l))
-#define __cpu_local_add(i, l) cpu_local_add((i), (l))
-#define __cpu_local_sub(i, l) cpu_local_sub((i), (l))
-
#endif /* _ASM_X86_LOCAL_H */
diff --git a/arch/x86/include/asm/percpu.h b/arch/x86/include/asm/percpu.h
index 0c44196b78ac..66a272dfd8b8 100644
--- a/arch/x86/include/asm/percpu.h
+++ b/arch/x86/include/asm/percpu.h
@@ -25,19 +25,18 @@
*/
#ifdef CONFIG_SMP
#define PER_CPU(var, reg) \
- __percpu_mov_op %__percpu_seg:per_cpu__this_cpu_off, reg; \
- lea per_cpu__##var(reg), reg
-#define PER_CPU_VAR(var) %__percpu_seg:per_cpu__##var
+ __percpu_mov_op %__percpu_seg:this_cpu_off, reg; \
+ lea var(reg), reg
+#define PER_CPU_VAR(var) %__percpu_seg:var
#else /* ! SMP */
-#define PER_CPU(var, reg) \
- __percpu_mov_op $per_cpu__##var, reg
-#define PER_CPU_VAR(var) per_cpu__##var
+#define PER_CPU(var, reg) __percpu_mov_op $var, reg
+#define PER_CPU_VAR(var) var
#endif /* SMP */
#ifdef CONFIG_X86_64_SMP
#define INIT_PER_CPU_VAR(var) init_per_cpu__##var
#else
-#define INIT_PER_CPU_VAR(var) per_cpu__##var
+#define INIT_PER_CPU_VAR(var) var
#endif
#else /* ...!ASSEMBLY */
@@ -60,12 +59,12 @@
* There also must be an entry in vmlinux_64.lds.S
*/
#define DECLARE_INIT_PER_CPU(var) \
- extern typeof(per_cpu_var(var)) init_per_cpu_var(var)
+ extern typeof(var) init_per_cpu_var(var)
#ifdef CONFIG_X86_64_SMP
#define init_per_cpu_var(var) init_per_cpu__##var
#else
-#define init_per_cpu_var(var) per_cpu_var(var)
+#define init_per_cpu_var(var) var
#endif
/* For arch-specific code, we can use direct single-insn ops (they
@@ -104,6 +103,64 @@ do { \
} \
} while (0)
+/*
+ * Generate a percpu add to memory instruction and optimize code
+ * if a one is added or subtracted.
+ */
+#define percpu_add_op(var, val) \
+do { \
+ typedef typeof(var) pao_T__; \
+ const int pao_ID__ = (__builtin_constant_p(val) && \
+ ((val) == 1 || (val) == -1)) ? (val) : 0; \
+ if (0) { \
+ pao_T__ pao_tmp__; \
+ pao_tmp__ = (val); \
+ } \
+ switch (sizeof(var)) { \
+ case 1: \
+ if (pao_ID__ == 1) \
+ asm("incb "__percpu_arg(0) : "+m" (var)); \
+ else if (pao_ID__ == -1) \
+ asm("decb "__percpu_arg(0) : "+m" (var)); \
+ else \
+ asm("addb %1, "__percpu_arg(0) \
+ : "+m" (var) \
+ : "qi" ((pao_T__)(val))); \
+ break; \
+ case 2: \
+ if (pao_ID__ == 1) \
+ asm("incw "__percpu_arg(0) : "+m" (var)); \
+ else if (pao_ID__ == -1) \
+ asm("decw "__percpu_arg(0) : "+m" (var)); \
+ else \
+ asm("addw %1, "__percpu_arg(0) \
+ : "+m" (var) \
+ : "ri" ((pao_T__)(val))); \
+ break; \
+ case 4: \
+ if (pao_ID__ == 1) \
+ asm("incl "__percpu_arg(0) : "+m" (var)); \
+ else if (pao_ID__ == -1) \
+ asm("decl "__percpu_arg(0) : "+m" (var)); \
+ else \
+ asm("addl %1, "__percpu_arg(0) \
+ : "+m" (var) \
+ : "ri" ((pao_T__)(val))); \
+ break; \
+ case 8: \
+ if (pao_ID__ == 1) \
+ asm("incq "__percpu_arg(0) : "+m" (var)); \
+ else if (pao_ID__ == -1) \
+ asm("decq "__percpu_arg(0) : "+m" (var)); \
+ else \
+ asm("addq %1, "__percpu_arg(0) \
+ : "+m" (var) \
+ : "re" ((pao_T__)(val))); \
+ break; \
+ default: __bad_percpu_size(); \
+ } \
+} while (0)
+
#define percpu_from_op(op, var, constraint) \
({ \
typeof(var) pfo_ret__; \
@@ -142,16 +199,14 @@ do { \
* per-thread variables implemented as per-cpu variables and thus
* stable for the duration of the respective task.
*/
-#define percpu_read(var) percpu_from_op("mov", per_cpu__##var, \
- "m" (per_cpu__##var))
-#define percpu_read_stable(var) percpu_from_op("mov", per_cpu__##var, \
- "p" (&per_cpu__##var))
-#define percpu_write(var, val) percpu_to_op("mov", per_cpu__##var, val)
-#define percpu_add(var, val) percpu_to_op("add", per_cpu__##var, val)
-#define percpu_sub(var, val) percpu_to_op("sub", per_cpu__##var, val)
-#define percpu_and(var, val) percpu_to_op("and", per_cpu__##var, val)
-#define percpu_or(var, val) percpu_to_op("or", per_cpu__##var, val)
-#define percpu_xor(var, val) percpu_to_op("xor", per_cpu__##var, val)
+#define percpu_read(var) percpu_from_op("mov", var, "m" (var))
+#define percpu_read_stable(var) percpu_from_op("mov", var, "p" (&(var)))
+#define percpu_write(var, val) percpu_to_op("mov", var, val)
+#define percpu_add(var, val) percpu_add_op(var, val)
+#define percpu_sub(var, val) percpu_add_op(var, -(val))
+#define percpu_and(var, val) percpu_to_op("and", var, val)
+#define percpu_or(var, val) percpu_to_op("or", var, val)
+#define percpu_xor(var, val) percpu_to_op("xor", var, val)
#define __this_cpu_read_1(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
#define __this_cpu_read_2(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
@@ -160,9 +215,9 @@ do { \
#define __this_cpu_write_1(pcp, val) percpu_to_op("mov", (pcp), val)
#define __this_cpu_write_2(pcp, val) percpu_to_op("mov", (pcp), val)
#define __this_cpu_write_4(pcp, val) percpu_to_op("mov", (pcp), val)
-#define __this_cpu_add_1(pcp, val) percpu_to_op("add", (pcp), val)
-#define __this_cpu_add_2(pcp, val) percpu_to_op("add", (pcp), val)
-#define __this_cpu_add_4(pcp, val) percpu_to_op("add", (pcp), val)
+#define __this_cpu_add_1(pcp, val) percpu_add_op((pcp), val)
+#define __this_cpu_add_2(pcp, val) percpu_add_op((pcp), val)
+#define __this_cpu_add_4(pcp, val) percpu_add_op((pcp), val)
#define __this_cpu_and_1(pcp, val) percpu_to_op("and", (pcp), val)
#define __this_cpu_and_2(pcp, val) percpu_to_op("and", (pcp), val)
#define __this_cpu_and_4(pcp, val) percpu_to_op("and", (pcp), val)
@@ -179,9 +234,9 @@ do { \
#define this_cpu_write_1(pcp, val) percpu_to_op("mov", (pcp), val)
#define this_cpu_write_2(pcp, val) percpu_to_op("mov", (pcp), val)
#define this_cpu_write_4(pcp, val) percpu_to_op("mov", (pcp), val)
-#define this_cpu_add_1(pcp, val) percpu_to_op("add", (pcp), val)
-#define this_cpu_add_2(pcp, val) percpu_to_op("add", (pcp), val)
-#define this_cpu_add_4(pcp, val) percpu_to_op("add", (pcp), val)
+#define this_cpu_add_1(pcp, val) percpu_add_op((pcp), val)
+#define this_cpu_add_2(pcp, val) percpu_add_op((pcp), val)
+#define this_cpu_add_4(pcp, val) percpu_add_op((pcp), val)
#define this_cpu_and_1(pcp, val) percpu_to_op("and", (pcp), val)
#define this_cpu_and_2(pcp, val) percpu_to_op("and", (pcp), val)
#define this_cpu_and_4(pcp, val) percpu_to_op("and", (pcp), val)
@@ -192,9 +247,9 @@ do { \
#define this_cpu_xor_2(pcp, val) percpu_to_op("xor", (pcp), val)
#define this_cpu_xor_4(pcp, val) percpu_to_op("xor", (pcp), val)
-#define irqsafe_cpu_add_1(pcp, val) percpu_to_op("add", (pcp), val)
-#define irqsafe_cpu_add_2(pcp, val) percpu_to_op("add", (pcp), val)
-#define irqsafe_cpu_add_4(pcp, val) percpu_to_op("add", (pcp), val)
+#define irqsafe_cpu_add_1(pcp, val) percpu_add_op((pcp), val)
+#define irqsafe_cpu_add_2(pcp, val) percpu_add_op((pcp), val)
+#define irqsafe_cpu_add_4(pcp, val) percpu_add_op((pcp), val)
#define irqsafe_cpu_and_1(pcp, val) percpu_to_op("and", (pcp), val)
#define irqsafe_cpu_and_2(pcp, val) percpu_to_op("and", (pcp), val)
#define irqsafe_cpu_and_4(pcp, val) percpu_to_op("and", (pcp), val)
@@ -212,19 +267,19 @@ do { \
#ifdef CONFIG_X86_64
#define __this_cpu_read_8(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
#define __this_cpu_write_8(pcp, val) percpu_to_op("mov", (pcp), val)
-#define __this_cpu_add_8(pcp, val) percpu_to_op("add", (pcp), val)
+#define __this_cpu_add_8(pcp, val) percpu_add_op((pcp), val)
#define __this_cpu_and_8(pcp, val) percpu_to_op("and", (pcp), val)
#define __this_cpu_or_8(pcp, val) percpu_to_op("or", (pcp), val)
#define __this_cpu_xor_8(pcp, val) percpu_to_op("xor", (pcp), val)
#define this_cpu_read_8(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
#define this_cpu_write_8(pcp, val) percpu_to_op("mov", (pcp), val)
-#define this_cpu_add_8(pcp, val) percpu_to_op("add", (pcp), val)
+#define this_cpu_add_8(pcp, val) percpu_add_op((pcp), val)
#define this_cpu_and_8(pcp, val) percpu_to_op("and", (pcp), val)
#define this_cpu_or_8(pcp, val) percpu_to_op("or", (pcp), val)
#define this_cpu_xor_8(pcp, val) percpu_to_op("xor", (pcp), val)
-#define irqsafe_cpu_add_8(pcp, val) percpu_to_op("add", (pcp), val)
+#define irqsafe_cpu_add_8(pcp, val) percpu_add_op((pcp), val)
#define irqsafe_cpu_and_8(pcp, val) percpu_to_op("and", (pcp), val)
#define irqsafe_cpu_or_8(pcp, val) percpu_to_op("or", (pcp), val)
#define irqsafe_cpu_xor_8(pcp, val) percpu_to_op("xor", (pcp), val)
@@ -236,7 +291,7 @@ do { \
({ \
int old__; \
asm volatile("btr %2,"__percpu_arg(1)"\n\tsbbl %0,%0" \
- : "=r" (old__), "+m" (per_cpu__##var) \
+ : "=r" (old__), "+m" (var) \
: "dIr" (bit)); \
old__; \
})
diff --git a/arch/x86/include/asm/system.h b/arch/x86/include/asm/system.h
index e04740f7a0bb..b8fe48ee2ed9 100644
--- a/arch/x86/include/asm/system.h
+++ b/arch/x86/include/asm/system.h
@@ -32,7 +32,7 @@ extern void show_regs_common(void);
"movl %P[task_canary](%[next]), %%ebx\n\t" \
"movl %%ebx, "__percpu_arg([stack_canary])"\n\t"
#define __switch_canary_oparam \
- , [stack_canary] "=m" (per_cpu_var(stack_canary.canary))
+ , [stack_canary] "=m" (stack_canary.canary)
#define __switch_canary_iparam \
, [task_canary] "i" (offsetof(struct task_struct, stack_canary))
#else /* CC_STACKPROTECTOR */
@@ -114,7 +114,7 @@ do { \
"movq %P[task_canary](%%rsi),%%r8\n\t" \
"movq %%r8,"__percpu_arg([gs_canary])"\n\t"
#define __switch_canary_oparam \
- , [gs_canary] "=m" (per_cpu_var(irq_stack_union.stack_canary))
+ , [gs_canary] "=m" (irq_stack_union.stack_canary)
#define __switch_canary_iparam \
, [task_canary] "i" (offsetof(struct task_struct, stack_canary))
#else /* CC_STACKPROTECTOR */
@@ -133,7 +133,7 @@ do { \
__switch_canary \
"movq %P[thread_info](%%rsi),%%r8\n\t" \
"movq %%rax,%%rdi\n\t" \
- "testl %[_tif_fork],%P[ti_flags](%%r8)\n\t" \
+ "testl %[_tif_fork],%P[ti_flags](%%r8)\n\t" \
"jnz ret_from_fork\n\t" \
RESTORE_CONTEXT \
: "=a" (last) \
@@ -143,7 +143,7 @@ do { \
[ti_flags] "i" (offsetof(struct thread_info, flags)), \
[_tif_fork] "i" (_TIF_FORK), \
[thread_info] "i" (offsetof(struct task_struct, stack)), \
- [current_task] "m" (per_cpu_var(current_task)) \
+ [current_task] "m" (current_task) \
__switch_canary_iparam \
: "memory", "cc" __EXTRA_CLOBBER)
#endif
diff --git a/arch/x86/kernel/apic/nmi.c b/arch/x86/kernel/apic/nmi.c
index 0159a69396cb..4ada42c3dabb 100644
--- a/arch/x86/kernel/apic/nmi.c
+++ b/arch/x86/kernel/apic/nmi.c
@@ -438,8 +438,8 @@ nmi_watchdog_tick(struct pt_regs *regs, unsigned reason)
* Ayiee, looks like this CPU is stuck ...
* wait a few IRQs (5 seconds) before doing the oops ...
*/
- __this_cpu_inc(per_cpu_var(alert_counter));
- if (__this_cpu_read(per_cpu_var(alert_counter)) == 5 * nmi_hz)
+ __this_cpu_inc(alert_counter);
+ if (__this_cpu_read(alert_counter) == 5 * nmi_hz)
/*
* die_nmi will return ONLY if NOTIFY_STOP happens..
*/
@@ -447,7 +447,7 @@ nmi_watchdog_tick(struct pt_regs *regs, unsigned reason)
regs, panic_on_timeout);
} else {
__get_cpu_var(last_irq_sum) = sum;
- __this_cpu_write(per_cpu_var(alert_counter), 0);
+ __this_cpu_write(alert_counter, 0);
}
/* see if the nmi watchdog went off */
diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S
index 7fd318bac59c..37c3d4b17d85 100644
--- a/arch/x86/kernel/head_32.S
+++ b/arch/x86/kernel/head_32.S
@@ -442,8 +442,8 @@ is386: movl $2,%ecx # set MP
*/
cmpb $0,ready
jne 1f
- movl $per_cpu__gdt_page,%eax
- movl $per_cpu__stack_canary,%ecx
+ movl $gdt_page,%eax
+ movl $stack_canary,%ecx
movw %cx, 8 * GDT_ENTRY_STACK_CANARY + 2(%eax)
shrl $16, %ecx
movb %cl, 8 * GDT_ENTRY_STACK_CANARY + 4(%eax)
@@ -706,7 +706,7 @@ idt_descr:
.word 0 # 32 bit align gdt_desc.address
ENTRY(early_gdt_descr)
.word GDT_ENTRIES*8-1
- .long per_cpu__gdt_page /* Overwritten for secondary CPUs */
+ .long gdt_page /* Overwritten for secondary CPUs */
/*
* The boot_gdt must mirror the equivalent in setup.S and is
diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S
index f92a0da608cb..44879df55696 100644
--- a/arch/x86/kernel/vmlinux.lds.S
+++ b/arch/x86/kernel/vmlinux.lds.S
@@ -341,7 +341,7 @@ SECTIONS
* Per-cpu symbols which need to be offset from __per_cpu_load
* for the boot processor.
*/
-#define INIT_PER_CPU(x) init_per_cpu__##x = per_cpu__##x + __per_cpu_load
+#define INIT_PER_CPU(x) init_per_cpu__##x = x + __per_cpu_load
INIT_PER_CPU(gdt_page);
INIT_PER_CPU(irq_stack_union);
@@ -352,7 +352,7 @@ INIT_PER_CPU(irq_stack_union);
"kernel image bigger than KERNEL_IMAGE_SIZE");
#ifdef CONFIG_SMP
-. = ASSERT((per_cpu__irq_stack_union == 0),
+. = ASSERT((irq_stack_union == 0),
"irq_stack_union is not at start of per-cpu area");
#endif
diff --git a/arch/x86/xen/xen-asm_32.S b/arch/x86/xen/xen-asm_32.S
index 88e15deb8b82..22a2093b5862 100644
--- a/arch/x86/xen/xen-asm_32.S
+++ b/arch/x86/xen/xen-asm_32.S
@@ -90,9 +90,9 @@ ENTRY(xen_iret)
GET_THREAD_INFO(%eax)
movl TI_cpu(%eax), %eax
movl __per_cpu_offset(,%eax,4), %eax
- mov per_cpu__xen_vcpu(%eax), %eax
+ mov xen_vcpu(%eax), %eax
#else
- movl per_cpu__xen_vcpu, %eax
+ movl xen_vcpu, %eax
#endif
/* check IF state we're restoring */
diff --git a/crypto/cryptd.c b/crypto/cryptd.c
index 704c14115323..ef71318976c7 100644
--- a/crypto/cryptd.c
+++ b/crypto/cryptd.c
@@ -31,7 +31,7 @@ struct cryptd_cpu_queue {
};
struct cryptd_queue {
- struct cryptd_cpu_queue *cpu_queue;
+ struct cryptd_cpu_queue __percpu *cpu_queue;
};
struct cryptd_instance_ctx {
diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c
index a959f6a07508..d648a9860b88 100644
--- a/drivers/acpi/processor_perflib.c
+++ b/drivers/acpi/processor_perflib.c
@@ -561,7 +561,7 @@ end:
}
int acpi_processor_preregister_performance(
- struct acpi_processor_performance *performance)
+ struct acpi_processor_performance __percpu *performance)
{
int count, count_target;
int retval = 0;
diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index e7a3230fb7d5..87399cafce37 100644
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -284,7 +284,7 @@ struct dma_chan_tbl_ent {
/**
* channel_table - percpu lookup table for memory-to-memory offload providers
*/
-static struct dma_chan_tbl_ent *channel_table[DMA_TX_TYPE_END];
+static struct dma_chan_tbl_ent __percpu *channel_table[DMA_TX_TYPE_END];
static int __init dma_channel_table_init(void)
{
diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index 3391e6739d06..7cd1cdcbe0f5 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -13,7 +13,7 @@ module_param(report_gart_errors, int, 0644);
static int ecc_enable_override;
module_param(ecc_enable_override, int, 0644);
-static struct msr *msrs;
+static struct msr __percpu *msrs;
/* Lookup table for all possible MC control instances */
struct amd64_pvt;
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 509c8f3dd9a5..70ffbd071b2e 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -4680,7 +4680,7 @@ static int raid5_alloc_percpu(raid5_conf_t *conf)
{
unsigned long cpu;
struct page *spare_page;
- struct raid5_percpu *allcpus;
+ struct raid5_percpu __percpu *allcpus;
void *scribble;
int err;
diff --git a/drivers/md/raid5.h b/drivers/md/raid5.h
index dd708359b451..0f86f5e36724 100644
--- a/drivers/md/raid5.h
+++ b/drivers/md/raid5.h
@@ -405,7 +405,7 @@ struct raid5_private_data {
* lists and performing address
* conversions
*/
- } *percpu;
+ } __percpu *percpu;
size_t scribble_len; /* size of scribble region must be
* associated with conf to handle
* cpu hotplug while reshaping
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 874d169a193e..4cedc91ec59d 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1014,7 +1014,7 @@ struct ext4_sb_info {
atomic_t s_lock_busy;
/* locality groups */
- struct ext4_locality_group *s_locality_groups;
+ struct ext4_locality_group __percpu *s_locality_groups;
/* for write statistics */
unsigned long s_sectors_written_start;
diff --git a/fs/nfs/iostat.h b/fs/nfs/iostat.h
index 46d779abafd3..1d8d5c813b01 100644
--- a/fs/nfs/iostat.h
+++ b/fs/nfs/iostat.h
@@ -57,12 +57,12 @@ static inline void nfs_add_fscache_stats(struct inode *inode,
}
#endif
-static inline struct nfs_iostats *nfs_alloc_iostats(void)
+static inline struct nfs_iostats __percpu *nfs_alloc_iostats(void)
{
return alloc_percpu(struct nfs_iostats);
}
-static inline void nfs_free_iostats(struct nfs_iostats *stats)
+static inline void nfs_free_iostats(struct nfs_iostats __percpu *stats)
{
if (stats != NULL)
free_percpu(stats);
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index 70504fcf14cd..14dafd608230 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -245,7 +245,7 @@ typedef struct xfs_mount {
struct xfs_qmops *m_qm_ops; /* vector of XQM ops */
atomic_t m_active_trans; /* number trans frozen */
#ifdef HAVE_PERCPU_SB
- xfs_icsb_cnts_t *m_sb_cnts; /* per-cpu superblock counters */
+ xfs_icsb_cnts_t __percpu *m_sb_cnts; /* per-cpu superblock counters */
unsigned long m_icsb_counters; /* disabled per-cpu counters */
struct notifier_block m_icsb_notifier; /* hotplug cpu notifier */
struct mutex m_icsb_mutex; /* balancer sync lock */
diff --git a/include/acpi/processor.h b/include/acpi/processor.h
index 29831768c0e6..1172c27adadf 100644
--- a/include/acpi/processor.h
+++ b/include/acpi/processor.h
@@ -238,7 +238,7 @@ struct acpi_processor_errata {
extern int acpi_processor_preregister_performance(struct
acpi_processor_performance
- *performance);
+ __percpu *performance);
extern int acpi_processor_register_performance(struct acpi_processor_performance
*performance, unsigned int cpu);
diff --git a/include/asm-generic/local.h b/include/asm-generic/local.h
index fc218444e315..c8a5d68541d7 100644
--- a/include/asm-generic/local.h
+++ b/include/asm-generic/local.h
@@ -52,23 +52,4 @@ typedef struct
#define __local_add(i,l) local_set((l), local_read(l) + (i))
#define __local_sub(i,l) local_set((l), local_read(l) - (i))
-/* Use these for per-cpu local_t variables: on some archs they are
- * much more efficient than these naive implementations. Note they take
- * a variable (eg. mystruct.foo), not an address.
- */
-#define cpu_local_read(l) local_read(&__get_cpu_var(l))
-#define cpu_local_set(l, i) local_set(&__get_cpu_var(l), (i))
-#define cpu_local_inc(l) local_inc(&__get_cpu_var(l))
-#define cpu_local_dec(l) local_dec(&__get_cpu_var(l))
-#define cpu_local_add(i, l) local_add((i), &__get_cpu_var(l))
-#define cpu_local_sub(i, l) local_sub((i), &__get_cpu_var(l))
-
-/* Non-atomic increments, ie. preemption disabled and won't be touched
- * in interrupt, etc. Some archs can optimize this case well.
- */
-#define __cpu_local_inc(l) __local_inc(&__get_cpu_var(l))
-#define __cpu_local_dec(l) __local_dec(&__get_cpu_var(l))
-#define __cpu_local_add(i, l) __local_add((i), &__get_cpu_var(l))
-#define __cpu_local_sub(i, l) __local_sub((i), &__get_cpu_var(l))
-
#endif /* _ASM_GENERIC_LOCAL_H */
diff --git a/include/asm-generic/percpu.h b/include/asm-generic/percpu.h
index 8087b90d4673..04f91c2d3f7b 100644
--- a/include/asm-generic/percpu.h
+++ b/include/asm-generic/percpu.h
@@ -41,7 +41,11 @@ extern unsigned long __per_cpu_offset[NR_CPUS];
* Only S390 provides its own means of moving the pointer.
*/
#ifndef SHIFT_PERCPU_PTR
-#define SHIFT_PERCPU_PTR(__p, __offset) RELOC_HIDE((__p), (__offset))
+/* Weird cast keeps both GCC and sparse happy. */
+#define SHIFT_PERCPU_PTR(__p, __offset) ({ \
+ __verify_pcpu_ptr((__p)); \
+ RELOC_HIDE((typeof(*(__p)) __kernel __force *)(__p), (__offset)); \
+})
#endif
/*
@@ -50,11 +54,11 @@ extern unsigned long __per_cpu_offset[NR_CPUS];
* offset.
*/
#define per_cpu(var, cpu) \
- (*SHIFT_PERCPU_PTR(&per_cpu_var(var), per_cpu_offset(cpu)))
+ (*SHIFT_PERCPU_PTR(&(var), per_cpu_offset(cpu)))
#define __get_cpu_var(var) \
- (*SHIFT_PERCPU_PTR(&per_cpu_var(var), my_cpu_offset))
+ (*SHIFT_PERCPU_PTR(&(var), my_cpu_offset))
#define __raw_get_cpu_var(var) \
- (*SHIFT_PERCPU_PTR(&per_cpu_var(var), __my_cpu_offset))
+ (*SHIFT_PERCPU_PTR(&(var), __my_cpu_offset))
#define this_cpu_ptr(ptr) SHIFT_PERCPU_PTR(ptr, my_cpu_offset)
#define __this_cpu_ptr(ptr) SHIFT_PERCPU_PTR(ptr, __my_cpu_offset)
@@ -66,9 +70,9 @@ extern void setup_per_cpu_areas(void);
#else /* ! SMP */
-#define per_cpu(var, cpu) (*((void)(cpu), &per_cpu_var(var)))
-#define __get_cpu_var(var) per_cpu_var(var)
-#define __raw_get_cpu_var(var) per_cpu_var(var)
+#define per_cpu(var, cpu) (*((void)(cpu), &(var)))
+#define __get_cpu_var(var) (var)
+#define __raw_get_cpu_var(var) (var)
#define this_cpu_ptr(ptr) per_cpu_ptr(ptr, 0)
#define __this_cpu_ptr(ptr) this_cpu_ptr(ptr)
diff --git a/include/linux/blktrace_api.h b/include/linux/blktrace_api.h
index 3b73b9992b26..416bf62d6d46 100644
--- a/include/linux/blktrace_api.h
+++ b/include/linux/blktrace_api.h
@@ -150,8 +150,8 @@ struct blk_user_trace_setup {
struct blk_trace {
int trace_state;
struct rchan *rchan;
- unsigned long *sequence;
- unsigned char *msg_data;
+ unsigned long __percpu *sequence;
+ unsigned char __percpu *msg_data;
u16 act_mask;
u64 start_lba;
u64 end_lba;
diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index 188fcae10a99..a5a472b10746 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -5,7 +5,7 @@
#ifdef __CHECKER__
# define __user __attribute__((noderef, address_space(1)))
-# define __kernel /* default address space */
+# define __kernel __attribute__((address_space(0)))
# define __safe __attribute__((safe))
# define __force __attribute__((force))
# define __nocast __attribute__((nocast))
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index 78784982b33e..21fd9b7c6a40 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -162,7 +162,7 @@ struct dma_chan {
struct dma_chan_dev *dev;
struct list_head device_node;
- struct dma_chan_percpu *local;
+ struct dma_chan_percpu __percpu *local;
int client_count;
int table_count;
void *private;
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index 9717081c75ad..56b50514ab25 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -101,7 +101,7 @@ struct hd_struct {
unsigned long stamp;
int in_flight[2];
#ifdef CONFIG_SMP
- struct disk_stats *dkstats;
+ struct disk_stats __percpu *dkstats;
#else
struct disk_stats dkstats;
#endif
diff --git a/include/linux/kexec.h b/include/linux/kexec.h
index c356b6914ffd..03e8e8dbc577 100644
--- a/include/linux/kexec.h
+++ b/include/linux/kexec.h
@@ -199,7 +199,7 @@ extern struct kimage *kexec_crash_image;
*/
extern struct resource crashk_res;
typedef u32 note_buf_t[KEXEC_NOTE_BYTES/4];
-extern note_buf_t *crash_notes;
+extern note_buf_t __percpu *crash_notes;
extern u32 vmcoreinfo_note[VMCOREINFO_NOTE_SIZE/4];
extern size_t vmcoreinfo_size;
extern size_t vmcoreinfo_max_size;
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 8b2fa8593c61..2e724c877ec1 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1081,11 +1081,7 @@ extern void si_meminfo(struct sysinfo * val);
extern void si_meminfo_node(struct sysinfo *val, int nid);
extern int after_bootmem;
-#ifdef CONFIG_NUMA
extern void setup_per_cpu_pageset(void);
-#else
-static inline void setup_per_cpu_pageset(void) {}
-#endif
extern void zone_pcp_update(struct zone *zone);
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 30fe668c2542..41acd4bf7664 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -184,13 +184,7 @@ struct per_cpu_pageset {
s8 stat_threshold;
s8 vm_stat_diff[NR_VM_ZONE_STAT_ITEMS];
#endif
-} ____cacheline_aligned_in_smp;
-
-#ifdef CONFIG_NUMA
-#define zone_pcp(__z, __cpu) ((__z)->pageset[(__cpu)])
-#else
-#define zone_pcp(__z, __cpu) (&(__z)->pageset[(__cpu)])
-#endif
+};
#endif /* !__GENERATING_BOUNDS.H */
@@ -306,10 +300,8 @@ struct zone {
*/
unsigned long min_unmapped_pages;
unsigned long min_slab_pages;
- struct per_cpu_pageset *pageset[NR_CPUS];
-#else
- struct per_cpu_pageset pageset[NR_CPUS];
#endif
+ struct per_cpu_pageset __percpu *pageset;
/*
* free areas of different sizes
*/
diff --git a/include/linux/module.h b/include/linux/module.h
index 6cb1a3cab5d3..dd618eb026aa 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -17,7 +17,7 @@
#include <linux/moduleparam.h>
#include <linux/tracepoint.h>
-#include <asm/local.h>
+#include <linux/percpu.h>
#include <asm/module.h>
#include <trace/events/module.h>
@@ -363,11 +363,9 @@ struct module
/* Destruction function. */
void (*exit)(void);
-#ifdef CONFIG_SMP
- char *refptr;
-#else
- local_t ref;
-#endif
+ struct module_ref {
+ int count;
+ } __percpu *refptr;
#endif
#ifdef CONFIG_CONSTRUCTORS
@@ -454,25 +452,16 @@ void __symbol_put(const char *symbol);
#define symbol_put(x) __symbol_put(MODULE_SYMBOL_PREFIX #x)
void symbol_put_addr(void *addr);
-static inline local_t *__module_ref_addr(struct module *mod, int cpu)
-{
-#ifdef CONFIG_SMP
- return (local_t *) (mod->refptr + per_cpu_offset(cpu));
-#else
- return &mod->ref;
-#endif
-}
-
/* Sometimes we know we already have a refcount, and it's easier not
to handle the error case (which only happens with rmmod --wait). */
static inline void __module_get(struct module *module)
{
if (module) {
- unsigned int cpu = get_cpu();
- local_inc(__module_ref_addr(module, cpu));
+ preempt_disable();
+ __this_cpu_inc(module->refptr->count);
trace_module_get(module, _THIS_IP_,
- local_read(__module_ref_addr(module, cpu)));
- put_cpu();
+ __this_cpu_read(module->refptr->count));
+ preempt_enable();
}
}
@@ -481,15 +470,17 @@ static inline int try_module_get(struct module *module)
int ret = 1;
if (module) {
- unsigned int cpu = get_cpu();
+ preempt_disable();
+
if (likely(module_is_live(module))) {
- local_inc(__module_ref_addr(module, cpu));
+ __this_cpu_inc(module->refptr->count);
trace_module_get(module, _THIS_IP_,
- local_read(__module_ref_addr(module, cpu)));
+ __this_cpu_read(module->refptr->count));
}
else
ret = 0;
- put_cpu();
+
+ preempt_enable();
}
return ret;
}
diff --git a/include/linux/mount.h b/include/linux/mount.h
index 5d5275364867..b5f43a34ef88 100644
--- a/include/linux/mount.h
+++ b/include/linux/mount.h
@@ -66,7 +66,7 @@ struct vfsmount {
int mnt_pinned;
int mnt_ghosts;
#ifdef CONFIG_SMP
- int *mnt_writers;
+ int __percpu *mnt_writers;
#else
int mnt_writers;
#endif
diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h
index 34fc6be5bfcf..6a2e44fd75e2 100644
--- a/include/linux/nfs_fs_sb.h
+++ b/include/linux/nfs_fs_sb.h
@@ -105,7 +105,7 @@ struct nfs_server {
struct rpc_clnt * client; /* RPC client handle */
struct rpc_clnt * client_acl; /* ACL RPC client handle */
struct nlm_host *nlm_host; /* NLM client handle */
- struct nfs_iostats * io_stats; /* I/O statistics */
+ struct nfs_iostats __percpu *io_stats; /* I/O statistics */
struct backing_dev_info backing_dev_info;
atomic_long_t writeback; /* number of writeback pages */
int flags; /* various flags */
diff --git a/include/linux/percpu-defs.h b/include/linux/percpu-defs.h
index 5a5d6ce4bd55..68567c0b3a5d 100644
--- a/include/linux/percpu-defs.h
+++ b/include/linux/percpu-defs.h
@@ -2,12 +2,6 @@
#define _LINUX_PERCPU_DEFS_H
/*
- * Determine the real variable name from the name visible in the
- * kernel sources.
- */
-#define per_cpu_var(var) per_cpu__##var
-
-/*
* Base implementations of per-CPU variable declarations and definitions, where
* the section in which the variable is to be placed is provided by the
* 'sec' argument. This may be used to affect the parameters governing the
@@ -18,13 +12,23 @@
* that section.
*/
#define __PCPU_ATTRS(sec) \
- __attribute__((section(PER_CPU_BASE_SECTION sec))) \
+ __percpu __attribute__((section(PER_CPU_BASE_SECTION sec))) \
PER_CPU_ATTRIBUTES
#define __PCPU_DUMMY_ATTRS \
__attribute__((section(".discard"), unused))
/*
+ * Macro which verifies @ptr is a percpu pointer without evaluating
+ * @ptr. This is to be used in percpu accessors to verify that the
+ * input parameter is a percpu pointer.
+ */
+#define __verify_pcpu_ptr(ptr) do { \
+ const void __percpu *__vpp_verify = (typeof(ptr))NULL; \
+ (void)__vpp_verify; \
+} while (0)
+
+/*
* s390 and alpha modules require percpu variables to be defined as
* weak to force the compiler to generate GOT based external
* references for them. This is necessary because percpu sections
@@ -56,24 +60,24 @@
*/
#define DECLARE_PER_CPU_SECTION(type, name, sec) \
extern __PCPU_DUMMY_ATTRS char __pcpu_scope_##name; \
- extern __PCPU_ATTRS(sec) __typeof__(type) per_cpu__##name
+ extern __PCPU_ATTRS(sec) __typeof__(type) name
#define DEFINE_PER_CPU_SECTION(type, name, sec) \
__PCPU_DUMMY_ATTRS char __pcpu_scope_##name; \
extern __PCPU_DUMMY_ATTRS char __pcpu_unique_##name; \
__PCPU_DUMMY_ATTRS char __pcpu_unique_##name; \
__PCPU_ATTRS(sec) PER_CPU_DEF_ATTRIBUTES __weak \
- __typeof__(type) per_cpu__##name
+ __typeof__(type) name
#else
/*
* Normal declaration and definition macros.
*/
#define DECLARE_PER_CPU_SECTION(type, name, sec) \
- extern __PCPU_ATTRS(sec) __typeof__(type) per_cpu__##name
+ extern __PCPU_ATTRS(sec) __typeof__(type) name
#define DEFINE_PER_CPU_SECTION(type, name, sec) \
__PCPU_ATTRS(sec) PER_CPU_DEF_ATTRIBUTES \
- __typeof__(type) per_cpu__##name
+ __typeof__(type) name
#endif
/*
@@ -135,10 +139,16 @@
__aligned(PAGE_SIZE)
/*
- * Intermodule exports for per-CPU variables.
+ * Intermodule exports for per-CPU variables. sparse forgets about
+ * address space across EXPORT_SYMBOL(), change EXPORT_SYMBOL() to
+ * noop if __CHECKER__.
*/
-#define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var)
-#define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var)
-
+#ifndef __CHECKER__
+#define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(var)
+#define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(var)
+#else
+#define EXPORT_PER_CPU_SYMBOL(var)
+#define EXPORT_PER_CPU_SYMBOL_GPL(var)
+#endif
#endif /* _LINUX_PERCPU_DEFS_H */
diff --git a/include/linux/percpu.h b/include/linux/percpu.h
index cf5efbcf716c..a93e5bfdccb8 100644
--- a/include/linux/percpu.h
+++ b/include/linux/percpu.h
@@ -27,10 +27,17 @@
* we force a syntax error here if it isn't.
*/
#define get_cpu_var(var) (*({ \
- extern int simple_identifier_##var(void); \
preempt_disable(); \
&__get_cpu_var(var); }))
-#define put_cpu_var(var) preempt_enable()
+
+/*
+ * The weird & is necessary because sparse considers (void)(var) to be
+ * a direct dereference of percpu variable (var).
+ */
+#define put_cpu_var(var) do { \
+ (void)&(var); \
+ preempt_enable(); \
+} while (0)
#ifdef CONFIG_SMP
@@ -127,9 +134,9 @@ extern int __init pcpu_page_first_chunk(size_t reserved_size,
*/
#define per_cpu_ptr(ptr, cpu) SHIFT_PERCPU_PTR((ptr), per_cpu_offset((cpu)))
-extern void *__alloc_reserved_percpu(size_t size, size_t align);
-extern void *__alloc_percpu(size_t size, size_t align);
-extern void free_percpu(void *__pdata);
+extern void __percpu *__alloc_reserved_percpu(size_t size, size_t align);
+extern void __percpu *__alloc_percpu(size_t size, size_t align);
+extern void free_percpu(void __percpu *__pdata);
extern phys_addr_t per_cpu_ptr_to_phys(void *addr);
#ifndef CONFIG_HAVE_SETUP_PER_CPU_AREA
@@ -140,7 +147,7 @@ extern void __init setup_per_cpu_areas(void);
#define per_cpu_ptr(ptr, cpu) ({ (void)(cpu); (ptr); })
-static inline void *__alloc_percpu(size_t size, size_t align)
+static inline void __percpu *__alloc_percpu(size_t size, size_t align)
{
/*
* Can't easily make larger alignment work with kmalloc. WARN
@@ -151,7 +158,7 @@ static inline void *__alloc_percpu(size_t size, size_t align)
return kzalloc(size, GFP_KERNEL);
}
-static inline void free_percpu(void *p)
+static inline void free_percpu(void __percpu *p)
{
kfree(p);
}
@@ -171,7 +178,7 @@ static inline void *pcpu_lpage_remapped(void *kaddr)
#endif /* CONFIG_SMP */
#define alloc_percpu(type) \
- (typeof(type) *)__alloc_percpu(sizeof(type), __alignof__(type))
+ (typeof(type) __percpu *)__alloc_percpu(sizeof(type), __alignof__(type))
/*
* Optional methods for optimized non-lvalue per-cpu variable access.
@@ -188,17 +195,19 @@ static inline void *pcpu_lpage_remapped(void *kaddr)
#ifndef percpu_read
# define percpu_read(var) \
({ \
- typeof(per_cpu_var(var)) __tmp_var__; \
- __tmp_var__ = get_cpu_var(var); \
- put_cpu_var(var); \
- __tmp_var__; \
+ typeof(var) *pr_ptr__ = &(var); \
+ typeof(var) pr_ret__; \
+ pr_ret__ = get_cpu_var(*pr_ptr__); \
+ put_cpu_var(*pr_ptr__); \
+ pr_ret__; \
})
#endif
#define __percpu_generic_to_op(var, val, op) \
do { \
- get_cpu_var(var) op val; \
- put_cpu_var(var); \
+ typeof(var) *pgto_ptr__ = &(var); \
+ get_cpu_var(*pgto_ptr__) op val; \
+ put_cpu_var(*pgto_ptr__); \
} while (0)
#ifndef percpu_write
@@ -234,6 +243,7 @@ extern void __bad_size_call_parameter(void);
#define __pcpu_size_call_return(stem, variable) \
({ typeof(variable) pscr_ret__; \
+ __verify_pcpu_ptr(&(variable)); \
switch(sizeof(variable)) { \
case 1: pscr_ret__ = stem##1(variable);break; \
case 2: pscr_ret__ = stem##2(variable);break; \
@@ -247,6 +257,7 @@ extern void __bad_size_call_parameter(void);
#define __pcpu_size_call(stem, variable, ...) \
do { \
+ __verify_pcpu_ptr(&(variable)); \
switch(sizeof(variable)) { \
case 1: stem##1(variable, __VA_ARGS__);break; \
case 2: stem##2(variable, __VA_ARGS__);break; \
@@ -259,8 +270,7 @@ do { \
/*
* Optimized manipulation for memory allocated through the per cpu
- * allocator or for addresses of per cpu variables (can be determined
- * using per_cpu_var(xx).
+ * allocator or for addresses of per cpu variables.
*
* These operation guarantee exclusivity of access for other operations
* on the *same* processor. The assumption is that per cpu data is only
@@ -311,7 +321,7 @@ do { \
#define _this_cpu_generic_to_op(pcp, val, op) \
do { \
preempt_disable(); \
- *__this_cpu_ptr(&pcp) op val; \
+ *__this_cpu_ptr(&(pcp)) op val; \
preempt_enable(); \
} while (0)
diff --git a/include/linux/percpu_counter.h b/include/linux/percpu_counter.h
index 794662b2be5d..c88d67b59394 100644
--- a/include/linux/percpu_counter.h
+++ b/include/linux/percpu_counter.h
@@ -21,7 +21,7 @@ struct percpu_counter {
#ifdef CONFIG_HOTPLUG_CPU
struct list_head list; /* All percpu_counters are on a list */
#endif
- s32 *counters;
+ s32 __percpu *counters;
};
extern int percpu_counter_batch;
diff --git a/include/linux/srcu.h b/include/linux/srcu.h
index 3084f80909cd..4d5ecb222af9 100644
--- a/include/linux/srcu.h
+++ b/include/linux/srcu.h
@@ -33,7 +33,7 @@ struct srcu_struct_array {
struct srcu_struct {
int completed;
- struct srcu_struct_array *per_cpu_ref;
+ struct srcu_struct_array __percpu *per_cpu_ref;
struct mutex mutex;
#ifdef CONFIG_DEBUG_LOCK_ALLOC
struct lockdep_map dep_map;
diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h
index ee03bba9c5df..117f0dd8ad03 100644
--- a/include/linux/vmstat.h
+++ b/include/linux/vmstat.h
@@ -78,22 +78,22 @@ DECLARE_PER_CPU(struct vm_event_state, vm_event_states);
static inline void __count_vm_event(enum vm_event_item item)
{
- __this_cpu_inc(per_cpu_var(vm_event_states).event[item]);
+ __this_cpu_inc(vm_event_states.event[item]);
}
static inline void count_vm_event(enum vm_event_item item)
{
- this_cpu_inc(per_cpu_var(vm_event_states).event[item]);
+ this_cpu_inc(vm_event_states.event[item]);
}
static inline void __count_vm_events(enum vm_event_item item, long delta)
{
- __this_cpu_add(per_cpu_var(vm_event_states).event[item], delta);
+ __this_cpu_add(vm_event_states.event[item], delta);
}
static inline void count_vm_events(enum vm_event_item item, long delta)
{
- this_cpu_add(per_cpu_var(vm_event_states).event[item], delta);
+ this_cpu_add(vm_event_states.event[item], delta);
}
extern void all_vm_events(unsigned long *);
diff --git a/kernel/kexec.c b/kernel/kexec.c
index ef077fb73155..87ebe8adc474 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -41,7 +41,7 @@
#include <asm/sections.h>
/* Per cpu memory for storing cpu states in case of system crash. */
-note_buf_t* crash_notes;
+note_buf_t __percpu *crash_notes;
/* vmcoreinfo stuff */
static unsigned char vmcoreinfo_data[VMCOREINFO_BYTES];
diff --git a/kernel/module.c b/kernel/module.c
index f82386bd9ee9..e5538d5f00ad 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -474,9 +474,10 @@ static void module_unload_init(struct module *mod)
INIT_LIST_HEAD(&mod->modules_which_use_me);
for_each_possible_cpu(cpu)
- local_set(__module_ref_addr(mod, cpu), 0);
+ per_cpu_ptr(mod->refptr, cpu)->count = 0;
+
/* Hold reference count during initialization. */
- local_set(__module_ref_addr(mod, raw_smp_processor_id()), 1);
+ __this_cpu_write(mod->refptr->count, 1);
/* Backwards compatibility macros put refcount during init. */
mod->waiter = current;
}
@@ -619,7 +620,7 @@ unsigned int module_refcount(struct module *mod)
int cpu;
for_each_possible_cpu(cpu)
- total += local_read(__module_ref_addr(mod, cpu));
+ total += per_cpu_ptr(mod->refptr, cpu)->count;
return total;
}
EXPORT_SYMBOL(module_refcount);
@@ -796,14 +797,15 @@ static struct module_attribute refcnt = {
void module_put(struct module *module)
{
if (module) {
- unsigned int cpu = get_cpu();
- local_dec(__module_ref_addr(module, cpu));
+ preempt_disable();
+ __this_cpu_dec(module->refptr->count);
+
trace_module_put(module, _RET_IP_,
- local_read(__module_ref_addr(module, cpu)));
+ __this_cpu_read(module->refptr->count));
/* Maybe they're waiting for us to drop reference? */
if (unlikely(!module_is_live(module)))
wake_up_process(module->waiter);
- put_cpu();
+ preempt_enable();
}
}
EXPORT_SYMBOL(module_put);
@@ -1397,9 +1399,9 @@ static void free_module(struct module *mod)
kfree(mod->args);
if (mod->percpu)
percpu_modfree(mod->percpu);
-#if defined(CONFIG_MODULE_UNLOAD) && defined(CONFIG_SMP)
+#if defined(CONFIG_MODULE_UNLOAD)
if (mod->refptr)
- percpu_modfree(mod->refptr);
+ free_percpu(mod->refptr);
#endif
/* Free lock-classes: */
lockdep_free_key_range(mod->module_core, mod->core_size);
@@ -2162,9 +2164,8 @@ static noinline struct module *load_module(void __user *umod,
mod = (void *)sechdrs[modindex].sh_addr;
kmemleak_load_module(mod, hdr, sechdrs, secstrings);
-#if defined(CONFIG_MODULE_UNLOAD) && defined(CONFIG_SMP)
- mod->refptr = percpu_modalloc(sizeof(local_t), __alignof__(local_t),
- mod->name);
+#if defined(CONFIG_MODULE_UNLOAD)
+ mod->refptr = alloc_percpu(struct module_ref);
if (!mod->refptr) {
err = -ENOMEM;
goto free_init;
@@ -2396,8 +2397,8 @@ static noinline struct module *load_module(void __user *umod,
kobject_put(&mod->mkobj.kobj);
free_unload:
module_unload_free(mod);
-#if defined(CONFIG_MODULE_UNLOAD) && defined(CONFIG_SMP)
- percpu_modfree(mod->refptr);
+#if defined(CONFIG_MODULE_UNLOAD)
+ free_percpu(mod->refptr);
free_init:
#endif
module_free(mod, mod->module_init);
diff --git a/kernel/rcutorture.c b/kernel/rcutorture.c
index 258cdf0a91eb..58df55bf83ed 100644
--- a/kernel/rcutorture.c
+++ b/kernel/rcutorture.c
@@ -818,13 +818,13 @@ static void rcu_torture_timer(unsigned long unused)
/* Should not happen, but... */
pipe_count = RCU_TORTURE_PIPE_LEN;
}
- __this_cpu_inc(per_cpu_var(rcu_torture_count)[pipe_count]);
+ __this_cpu_inc(rcu_torture_count[pipe_count]);
completed = cur_ops->completed() - completed;
if (completed > RCU_TORTURE_PIPE_LEN) {
/* Should not happen, but... */
completed = RCU_TORTURE_PIPE_LEN;
}
- __this_cpu_inc(per_cpu_var(rcu_torture_batch)[completed]);
+ __this_cpu_inc(rcu_torture_batch[completed]);
preempt_enable();
cur_ops->readunlock(idx);
}
@@ -877,13 +877,13 @@ rcu_torture_reader(void *arg)
/* Should not happen, but... */
pipe_count = RCU_TORTURE_PIPE_LEN;
}
- __this_cpu_inc(per_cpu_var(rcu_torture_count)[pipe_count]);
+ __this_cpu_inc(rcu_torture_count[pipe_count]);
completed = cur_ops->completed() - completed;
if (completed > RCU_TORTURE_PIPE_LEN) {
/* Should not happen, but... */
completed = RCU_TORTURE_PIPE_LEN;
}
- __this_cpu_inc(per_cpu_var(rcu_torture_batch)[completed]);
+ __this_cpu_inc(rcu_torture_batch[completed]);
preempt_enable();
cur_ops->readunlock(idx);
schedule();
diff --git a/kernel/sched.c b/kernel/sched.c
index 6a212c97f523..abb36b16b93b 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -1521,7 +1521,7 @@ static unsigned long cpu_avg_load_per_task(int cpu)
#ifdef CONFIG_FAIR_GROUP_SCHED
-static __read_mostly unsigned long *update_shares_data;
+static __read_mostly unsigned long __percpu *update_shares_data;
static void __set_se_shares(struct sched_entity *se, unsigned long shares);
@@ -8813,7 +8813,7 @@ struct cgroup_subsys cpu_cgroup_subsys = {
struct cpuacct {
struct cgroup_subsys_state css;
/* cpuusage holds pointer to a u64-type object on every cpu */
- u64 *cpuusage;
+ u64 __percpu *cpuusage;
struct percpu_counter cpustat[CPUACCT_STAT_NSTATS];
struct cpuacct *parent;
};
diff --git a/kernel/stop_machine.c b/kernel/stop_machine.c
index 912823e2a11b..9bb9fb1bd79c 100644
--- a/kernel/stop_machine.c
+++ b/kernel/stop_machine.c
@@ -45,7 +45,7 @@ static int refcount;
static struct workqueue_struct *stop_machine_wq;
static struct stop_machine_data active, idle;
static const struct cpumask *active_cpus;
-static void *stop_machine_work;
+static void __percpu *stop_machine_work;
static void set_state(enum stopmachine_state newstate)
{
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 8c1b2d290718..0287f9f52f5a 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -20,6 +20,7 @@
#include <linux/cpu.h>
#include <linux/fs.h>
+#include <asm/local.h>
#include "trace.h"
/*
diff --git a/kernel/trace/ring_buffer_benchmark.c b/kernel/trace/ring_buffer_benchmark.c
index b2477caf09c2..df74c7982255 100644
--- a/kernel/trace/ring_buffer_benchmark.c
+++ b/kernel/trace/ring_buffer_benchmark.c
@@ -8,6 +8,7 @@
#include <linux/kthread.h>
#include <linux/module.h>
#include <linux/time.h>
+#include <asm/local.h>
struct rb_page {
u64 ts;
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 032c57ca6502..ed01fdba4a55 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -92,12 +92,12 @@ DEFINE_PER_CPU(int, ftrace_cpu_disabled);
static inline void ftrace_disable_cpu(void)
{
preempt_disable();
- __this_cpu_inc(per_cpu_var(ftrace_cpu_disabled));
+ __this_cpu_inc(ftrace_cpu_disabled);
}
static inline void ftrace_enable_cpu(void)
{
- __this_cpu_dec(per_cpu_var(ftrace_cpu_disabled));
+ __this_cpu_dec(ftrace_cpu_disabled);
preempt_enable();
}
@@ -1166,7 +1166,7 @@ trace_function(struct trace_array *tr,
struct ftrace_entry *entry;
/* If we are reading the ring buffer, don't trace */
- if (unlikely(__this_cpu_read(per_cpu_var(ftrace_cpu_disabled))))
+ if (unlikely(__this_cpu_read(ftrace_cpu_disabled)))
return;
event = trace_buffer_lock_reserve(buffer, TRACE_FN, sizeof(*entry),
diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c
index e998a824e9db..3fc2a575664f 100644
--- a/kernel/trace/trace_functions_graph.c
+++ b/kernel/trace/trace_functions_graph.c
@@ -188,7 +188,7 @@ static int __trace_graph_entry(struct trace_array *tr,
struct ring_buffer *buffer = tr->buffer;
struct ftrace_graph_ent_entry *entry;
- if (unlikely(__this_cpu_read(per_cpu_var(ftrace_cpu_disabled))))
+ if (unlikely(__this_cpu_read(ftrace_cpu_disabled)))
return 0;
event = trace_buffer_lock_reserve(buffer, TRACE_GRAPH_ENT,
@@ -247,7 +247,7 @@ static void __trace_graph_return(struct trace_array *tr,
struct ring_buffer *buffer = tr->buffer;
struct ftrace_graph_ret_entry *entry;
- if (unlikely(__this_cpu_read(per_cpu_var(ftrace_cpu_disabled))))
+ if (unlikely(__this_cpu_read(ftrace_cpu_disabled)))
return;
event = trace_buffer_lock_reserve(buffer, TRACE_GRAPH_RET,
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 8deb9d0fd5b1..9a7aaae07ab4 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1009,10 +1009,10 @@ static void drain_pages(unsigned int cpu)
struct per_cpu_pageset *pset;
struct per_cpu_pages *pcp;
- pset = zone_pcp(zone, cpu);
+ local_irq_save(flags);
+ pset = per_cpu_ptr(zone->pageset, cpu);
pcp = &pset->pcp;
- local_irq_save(flags);
free_pcppages_bulk(zone, pcp->count, pcp);
pcp->count = 0;
local_irq_restore(flags);
@@ -1096,7 +1096,6 @@ static void free_hot_cold_page(struct page *page, int cold)
arch_free_page(page, 0);
kernel_map_pages(page, 1, 0);
- pcp = &zone_pcp(zone, get_cpu())->pcp;
migratetype = get_pageblock_migratetype(page);
set_page_private(page, migratetype);
local_irq_save(flags);
@@ -1119,6 +1118,7 @@ static void free_hot_cold_page(struct page *page, int cold)
migratetype = MIGRATE_MOVABLE;
}
+ pcp = &this_cpu_ptr(zone->pageset)->pcp;
if (cold)
list_add_tail(&page->lru, &pcp->lists[migratetype]);
else
@@ -1131,7 +1131,6 @@ static void free_hot_cold_page(struct page *page, int cold)
out:
local_irq_restore(flags);
- put_cpu();
}
void free_hot_page(struct page *page)
@@ -1181,17 +1180,15 @@ struct page *buffered_rmqueue(struct zone *preferred_zone,
unsigned long flags;
struct page *page;
int cold = !!(gfp_flags & __GFP_COLD);
- int cpu;
again:
- cpu = get_cpu();
if (likely(order == 0)) {
struct per_cpu_pages *pcp;
struct list_head *list;
- pcp = &zone_pcp(zone, cpu)->pcp;
- list = &pcp->lists[migratetype];
local_irq_save(flags);
+ pcp = &this_cpu_ptr(zone->pageset)->pcp;
+ list = &pcp->lists[migratetype];
if (list_empty(list)) {
pcp->count += rmqueue_bulk(zone, 0,
pcp->batch, list,
@@ -1232,7 +1229,6 @@ again:
__count_zone_vm_events(PGALLOC, zone, 1 << order);
zone_statistics(preferred_zone, zone);
local_irq_restore(flags);
- put_cpu();
VM_BUG_ON(bad_range(zone, page));
if (prep_new_page(page, order, gfp_flags))
@@ -1241,7 +1237,6 @@ again:
failed:
local_irq_restore(flags);
- put_cpu();
return NULL;
}
@@ -2180,7 +2175,7 @@ void show_free_areas(void)
for_each_online_cpu(cpu) {
struct per_cpu_pageset *pageset;
- pageset = zone_pcp(zone, cpu);
+ pageset = per_cpu_ptr(zone->pageset, cpu);
printk("CPU %4d: hi:%5d, btch:%4d usd:%4d\n",
cpu, pageset->pcp.high,
@@ -2745,10 +2740,29 @@ static void build_zonelist_cache(pg_data_t *pgdat)
#endif /* CONFIG_NUMA */
+/*
+ * Boot pageset table. One per cpu which is going to be used for all
+ * zones and all nodes. The parameters will be set in such a way
+ * that an item put on a list will immediately be handed over to
+ * the buddy list. This is safe since pageset manipulation is done
+ * with interrupts disabled.
+ *
+ * The boot_pagesets must be kept even after bootup is complete for
+ * unused processors and/or zones. They do play a role for bootstrapping
+ * hotplugged processors.
+ *
+ * zoneinfo_show() and maybe other functions do
+ * not check if the processor is online before following the pageset pointer.
+ * Other parts of the kernel may not check if the zone is available.
+ */
+static void setup_pageset(struct per_cpu_pageset *p, unsigned long batch);
+static DEFINE_PER_CPU(struct per_cpu_pageset, boot_pageset);
+
/* return values int ....just for stop_machine() */
static int __build_all_zonelists(void *dummy)
{
int nid;
+ int cpu;
#ifdef CONFIG_NUMA
memset(node_load, 0, sizeof(node_load));
@@ -2759,6 +2773,23 @@ static int __build_all_zonelists(void *dummy)
build_zonelists(pgdat);
build_zonelist_cache(pgdat);
}
+
+ /*
+ * Initialize the boot_pagesets that are going to be used
+ * for bootstrapping processors. The real pagesets for
+ * each zone will be allocated later when the per cpu
+ * allocator is available.
+ *
+ * boot_pagesets are used also for bootstrapping offline
+ * cpus if the system is already booted because the pagesets
+ * are needed to initialize allocators on a specific cpu too.
+ * F.e. the percpu allocator needs the page allocator which
+ * needs the percpu allocator in order to allocate its pagesets
+ * (a chicken-egg dilemma).
+ */
+ for_each_possible_cpu(cpu)
+ setup_pageset(&per_cpu(boot_pageset, cpu), 0);
+
return 0;
}
@@ -3096,121 +3127,33 @@ static void setup_pagelist_highmark(struct per_cpu_pageset *p,
pcp->batch = PAGE_SHIFT * 8;
}
-
-#ifdef CONFIG_NUMA
-/*
- * Boot pageset table. One per cpu which is going to be used for all
- * zones and all nodes. The parameters will be set in such a way
- * that an item put on a list will immediately be handed over to
- * the buddy list. This is safe since pageset manipulation is done
- * with interrupts disabled.
- *
- * Some NUMA counter updates may also be caught by the boot pagesets.
- *
- * The boot_pagesets must be kept even after bootup is complete for
- * unused processors and/or zones. They do play a role for bootstrapping
- * hotplugged processors.
- *
- * zoneinfo_show() and maybe other functions do
- * not check if the processor is online before following the pageset pointer.
- * Other parts of the kernel may not check if the zone is available.
- */
-static struct per_cpu_pageset boot_pageset[NR_CPUS];
-
/*
- * Dynamically allocate memory for the
- * per cpu pageset array in struct zone.
+ * Allocate per cpu pagesets and initialize them.
+ * Before this call only boot pagesets were available.
+ * Boot pagesets will no longer be used by this processorr
+ * after setup_per_cpu_pageset().
*/
-static int __cpuinit process_zones(int cpu)
+void __init setup_per_cpu_pageset(void)
{
- struct zone *zone, *dzone;
- int node = cpu_to_node(cpu);
-
- node_set_state(node, N_CPU); /* this node has a cpu */
+ struct zone *zone;
+ int cpu;
for_each_populated_zone(zone) {
- zone_pcp(zone, cpu) = kmalloc_node(sizeof(struct per_cpu_pageset),
- GFP_KERNEL, node);
- if (!zone_pcp(zone, cpu))
- goto bad;
-
- setup_pageset(zone_pcp(zone, cpu), zone_batchsize(zone));
-
- if (percpu_pagelist_fraction)
- setup_pagelist_highmark(zone_pcp(zone, cpu),
- (zone->present_pages / percpu_pagelist_fraction));
- }
-
- return 0;
-bad:
- for_each_zone(dzone) {
- if (!populated_zone(dzone))
- continue;
- if (dzone == zone)
- break;
- kfree(zone_pcp(dzone, cpu));
- zone_pcp(dzone, cpu) = &boot_pageset[cpu];
- }
- return -ENOMEM;
-}
+ zone->pageset = alloc_percpu(struct per_cpu_pageset);
-static inline void free_zone_pagesets(int cpu)
-{
- struct zone *zone;
-
- for_each_zone(zone) {
- struct per_cpu_pageset *pset = zone_pcp(zone, cpu);
+ for_each_possible_cpu(cpu) {
+ struct per_cpu_pageset *pcp = per_cpu_ptr(zone->pageset, cpu);
- /* Free per_cpu_pageset if it is slab allocated */
- if (pset != &boot_pageset[cpu])
- kfree(pset);
- zone_pcp(zone, cpu) = &boot_pageset[cpu];
- }
-}
+ setup_pageset(pcp, zone_batchsize(zone));
-static int __cpuinit pageset_cpuup_callback(struct notifier_block *nfb,
- unsigned long action,
- void *hcpu)
-{
- int cpu = (long)hcpu;
- int ret = NOTIFY_OK;
-
- switch (action) {
- case CPU_UP_PREPARE:
- case CPU_UP_PREPARE_FROZEN:
- if (process_zones(cpu))
- ret = NOTIFY_BAD;
- break;
- case CPU_UP_CANCELED:
- case CPU_UP_CANCELED_FROZEN:
- case CPU_DEAD:
- case CPU_DEAD_FROZEN:
- free_zone_pagesets(cpu);
- break;
- default:
- break;
+ if (percpu_pagelist_fraction)
+ setup_pagelist_highmark(pcp,
+ (zone->present_pages /
+ percpu_pagelist_fraction));
+ }
}
- return ret;
}
-static struct notifier_block __cpuinitdata pageset_notifier =
- { &pageset_cpuup_callback, NULL, 0 };
-
-void __init setup_per_cpu_pageset(void)
-{
- int err;
-
- /* Initialize per_cpu_pageset for cpu 0.
- * A cpuup callback will do this for every cpu
- * as it comes online
- */
- err = process_zones(smp_processor_id());
- BUG_ON(err);
- register_cpu_notifier(&pageset_notifier);
-}
-
-#endif
-
static noinline __init_refok
int zone_wait_table_init(struct zone *zone, unsigned long zone_size_pages)
{
@@ -3264,7 +3207,7 @@ static int __zone_pcp_update(void *data)
struct per_cpu_pageset *pset;
struct per_cpu_pages *pcp;
- pset = zone_pcp(zone, cpu);
+ pset = per_cpu_ptr(zone->pageset, cpu);
pcp = &pset->pcp;
local_irq_save(flags);
@@ -3282,21 +3225,17 @@ void zone_pcp_update(struct zone *zone)
static __meminit void zone_pcp_init(struct zone *zone)
{
- int cpu;
- unsigned long batch = zone_batchsize(zone);
+ /*
+ * per cpu subsystem is not up at this point. The following code
+ * relies on the ability of the linker to provide the
+ * offset of a (static) per cpu variable into the per cpu area.
+ */
+ zone->pageset = &boot_pageset;
- for (cpu = 0; cpu < NR_CPUS; cpu++) {
-#ifdef CONFIG_NUMA
- /* Early boot. Slab allocator not functional yet */
- zone_pcp(zone, cpu) = &boot_pageset[cpu];
- setup_pageset(&boot_pageset[cpu],0);
-#else
- setup_pageset(zone_pcp(zone,cpu), batch);
-#endif
- }
if (zone->present_pages)
- printk(KERN_DEBUG " %s zone: %lu pages, LIFO batch:%lu\n",
- zone->name, zone->present_pages, batch);
+ printk(KERN_DEBUG " %s zone: %lu pages, LIFO batch:%u\n",
+ zone->name, zone->present_pages,
+ zone_batchsize(zone));
}
__meminit int init_currently_empty_zone(struct zone *zone,
@@ -4810,10 +4749,11 @@ int percpu_pagelist_fraction_sysctl_handler(ctl_table *table, int write,
if (!write || (ret == -EINVAL))
return ret;
for_each_populated_zone(zone) {
- for_each_online_cpu(cpu) {
+ for_each_possible_cpu(cpu) {
unsigned long high;
high = zone->present_pages / percpu_pagelist_fraction;
- setup_pagelist_highmark(zone_pcp(zone, cpu), high);
+ setup_pagelist_highmark(
+ per_cpu_ptr(zone->pageset, cpu), high);
}
}
return 0;
diff --git a/mm/percpu.c b/mm/percpu.c
index 083e7c91e5f6..768419d44ad7 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -80,13 +80,15 @@
/* default addr <-> pcpu_ptr mapping, override in asm/percpu.h if necessary */
#ifndef __addr_to_pcpu_ptr
#define __addr_to_pcpu_ptr(addr) \
- (void *)((unsigned long)(addr) - (unsigned long)pcpu_base_addr \
- + (unsigned long)__per_cpu_start)
+ (void __percpu *)((unsigned long)(addr) - \
+ (unsigned long)pcpu_base_addr + \
+ (unsigned long)__per_cpu_start)
#endif
#ifndef __pcpu_ptr_to_addr
#define __pcpu_ptr_to_addr(ptr) \
- (void *)((unsigned long)(ptr) + (unsigned long)pcpu_base_addr \
- - (unsigned long)__per_cpu_start)
+ (void __force *)((unsigned long)(ptr) + \
+ (unsigned long)pcpu_base_addr - \
+ (unsigned long)__per_cpu_start)
#endif
struct pcpu_chunk {
@@ -913,11 +915,10 @@ static void pcpu_depopulate_chunk(struct pcpu_chunk *chunk, int off, int size)
int rs, re;
/* quick path, check whether it's empty already */
- pcpu_for_each_unpop_region(chunk, rs, re, page_start, page_end) {
- if (rs == page_start && re == page_end)
- return;
- break;
- }
+ rs = page_start;
+ pcpu_next_unpop(chunk, &rs, &re, page_end);
+ if (rs == page_start && re == page_end)
+ return;
/* immutable chunks can't be depopulated */
WARN_ON(chunk->immutable);
@@ -968,11 +969,10 @@ static int pcpu_populate_chunk(struct pcpu_chunk *chunk, int off, int size)
int rs, re, rc;
/* quick path, check whether all pages are already there */
- pcpu_for_each_pop_region(chunk, rs, re, page_start, page_end) {
- if (rs == page_start && re == page_end)
- goto clear;
- break;
- }
+ rs = page_start;
+ pcpu_next_pop(chunk, &rs, &re, page_end);
+ if (rs == page_start && re == page_end)
+ goto clear;
/* need to allocate and map pages, this chunk can't be immutable */
WARN_ON(chunk->immutable);
@@ -1067,7 +1067,7 @@ static struct pcpu_chunk *alloc_pcpu_chunk(void)
* RETURNS:
* Percpu pointer to the allocated area on success, NULL on failure.
*/
-static void *pcpu_alloc(size_t size, size_t align, bool reserved)
+static void __percpu *pcpu_alloc(size_t size, size_t align, bool reserved)
{
static int warn_limit = 10;
struct pcpu_chunk *chunk;
@@ -1196,7 +1196,7 @@ fail_unlock_mutex:
* RETURNS:
* Percpu pointer to the allocated area on success, NULL on failure.
*/
-void *__alloc_percpu(size_t size, size_t align)
+void __percpu *__alloc_percpu(size_t size, size_t align)
{
return pcpu_alloc(size, align, false);
}
@@ -1217,7 +1217,7 @@ EXPORT_SYMBOL_GPL(__alloc_percpu);
* RETURNS:
* Percpu pointer to the allocated area on success, NULL on failure.
*/
-void *__alloc_reserved_percpu(size_t size, size_t align)
+void __percpu *__alloc_reserved_percpu(size_t size, size_t align)
{
return pcpu_alloc(size, align, true);
}
@@ -1269,7 +1269,7 @@ static void pcpu_reclaim(struct work_struct *work)
* CONTEXT:
* Can be called from atomic context.
*/
-void free_percpu(void *ptr)
+void free_percpu(void __percpu *ptr)
{
void *addr;
struct pcpu_chunk *chunk;
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 6051fbab67ba..fc5aa183bc45 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -139,7 +139,8 @@ static void refresh_zone_stat_thresholds(void)
threshold = calculate_threshold(zone);
for_each_online_cpu(cpu)
- zone_pcp(zone, cpu)->stat_threshold = threshold;
+ per_cpu_ptr(zone->pageset, cpu)->stat_threshold
+ = threshold;
}
}
@@ -149,7 +150,8 @@ static void refresh_zone_stat_thresholds(void)
void __mod_zone_page_state(struct zone *zone, enum zone_stat_item item,
int delta)
{
- struct per_cpu_pageset *pcp = zone_pcp(zone, smp_processor_id());
+ struct per_cpu_pageset *pcp = this_cpu_ptr(zone->pageset);
+
s8 *p = pcp->vm_stat_diff + item;
long x;
@@ -202,7 +204,7 @@ EXPORT_SYMBOL(mod_zone_page_state);
*/
void __inc_zone_state(struct zone *zone, enum zone_stat_item item)
{
- struct per_cpu_pageset *pcp = zone_pcp(zone, smp_processor_id());
+ struct per_cpu_pageset *pcp = this_cpu_ptr(zone->pageset);
s8 *p = pcp->vm_stat_diff + item;
(*p)++;
@@ -223,7 +225,7 @@ EXPORT_SYMBOL(__inc_zone_page_state);
void __dec_zone_state(struct zone *zone, enum zone_stat_item item)
{
- struct per_cpu_pageset *pcp = zone_pcp(zone, smp_processor_id());
+ struct per_cpu_pageset *pcp = this_cpu_ptr(zone->pageset);
s8 *p = pcp->vm_stat_diff + item;
(*p)--;
@@ -300,7 +302,7 @@ void refresh_cpu_vm_stats(int cpu)
for_each_populated_zone(zone) {
struct per_cpu_pageset *p;
- p = zone_pcp(zone, cpu);
+ p = per_cpu_ptr(zone->pageset, cpu);
for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++)
if (p->vm_stat_diff[i]) {
@@ -741,7 +743,7 @@ static void zoneinfo_show_print(struct seq_file *m, pg_data_t *pgdat,
for_each_online_cpu(i) {
struct per_cpu_pageset *pageset;
- pageset = zone_pcp(zone, i);
+ pageset = per_cpu_ptr(zone->pageset, i);
seq_printf(m,
"\n cpu: %i"
"\n count: %i"
@@ -906,6 +908,7 @@ static int __cpuinit vmstat_cpuup_callback(struct notifier_block *nfb,
case CPU_ONLINE:
case CPU_ONLINE_FROZEN:
start_cpu_timer(cpu);
+ node_set_state(cpu_to_node(cpu), N_CPU);
break;
case CPU_DOWN_PREPARE:
case CPU_DOWN_PREPARE_FROZEN:

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