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authorLinus Torvalds <torvalds@linux-foundation.org>2020-04-07 12:33:37 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-04-07 12:33:37 -0700
commitd5d247661e869b71e4db5ca69b08b9607895d496 (patch)
tree12442d9817e30edcd6b0e100aeb883bd517ce832 /arch/openrisc
parentf9db97d751870cbffc85f4aa0d8aca8a79432691 (diff)
parent9737e2c5f0bc768b58416ec070bd96c91c52a153 (diff)
Merge tag 'for-linus' of git://github.com/openrisc/linux
Pull OpenRISC updates from Stafford Horne: "A few cleanups all over the place, things of note: - Enable the clone3 syscall - Remove CONFIG_CROSS_COMPILE from Krzysztof Kozlowski - Update to use mmgrab from Julia Lawall" * tag 'for-linus' of git://github.com/openrisc/linux: openrisc: Remove obsolete show_trace_task function openrisc: Cleanup copy_thread_tls docs and comments openrisc: Enable the clone3 syscall openrisc: Convert copy_thread to copy_thread_tls openrisc: use mmgrab openrisc: configs: Cleanup CONFIG_CROSS_COMPILE
Diffstat (limited to 'arch/openrisc')
-rw-r--r--arch/openrisc/Kconfig1
-rw-r--r--arch/openrisc/configs/or1ksim_defconfig1
-rw-r--r--arch/openrisc/configs/simple_smp_defconfig1
-rw-r--r--arch/openrisc/include/uapi/asm/unistd.h1
-rw-r--r--arch/openrisc/kernel/process.c18
-rw-r--r--arch/openrisc/kernel/smp.c3
-rw-r--r--arch/openrisc/kernel/traps.c7
7 files changed, 10 insertions, 22 deletions
diff --git a/arch/openrisc/Kconfig b/arch/openrisc/Kconfig
index 7e94fe37cb2f..8588996165ae 100644
--- a/arch/openrisc/Kconfig
+++ b/arch/openrisc/Kconfig
@@ -16,6 +16,7 @@ config OPENRISC
select HANDLE_DOMAIN_IRQ
select GPIOLIB
select HAVE_ARCH_TRACEHOOK
+ select HAVE_COPY_THREAD_TLS
select SPARSE_IRQ
select GENERIC_IRQ_CHIP
select GENERIC_IRQ_PROBE
diff --git a/arch/openrisc/configs/or1ksim_defconfig b/arch/openrisc/configs/or1ksim_defconfig
index d8ff4f8ffb88..75f2da324d0e 100644
--- a/arch/openrisc/configs/or1ksim_defconfig
+++ b/arch/openrisc/configs/or1ksim_defconfig
@@ -1,4 +1,3 @@
-CONFIG_CROSS_COMPILE="or1k-linux-"
CONFIG_NO_HZ=y
CONFIG_LOG_BUF_SHIFT=14
CONFIG_BLK_DEV_INITRD=y
diff --git a/arch/openrisc/configs/simple_smp_defconfig b/arch/openrisc/configs/simple_smp_defconfig
index 64278992df9c..ff49d868e040 100644
--- a/arch/openrisc/configs/simple_smp_defconfig
+++ b/arch/openrisc/configs/simple_smp_defconfig
@@ -1,4 +1,3 @@
-CONFIG_CROSS_COMPILE="or1k-linux-"
CONFIG_LOCALVERSION="-simple-smp"
CONFIG_NO_HZ=y
CONFIG_LOG_BUF_SHIFT=14
diff --git a/arch/openrisc/include/uapi/asm/unistd.h b/arch/openrisc/include/uapi/asm/unistd.h
index 566f8c4f8047..fae34c60fa88 100644
--- a/arch/openrisc/include/uapi/asm/unistd.h
+++ b/arch/openrisc/include/uapi/asm/unistd.h
@@ -24,6 +24,7 @@
#define __ARCH_WANT_SET_GET_RLIMIT
#define __ARCH_WANT_SYS_FORK
#define __ARCH_WANT_SYS_CLONE
+#define __ARCH_WANT_SYS_CLONE3
#define __ARCH_WANT_TIME32_SYSCALLS
#include <asm-generic/unistd.h>
diff --git a/arch/openrisc/kernel/process.c b/arch/openrisc/kernel/process.c
index b06f84f6676f..6bcdca424e11 100644
--- a/arch/openrisc/kernel/process.c
+++ b/arch/openrisc/kernel/process.c
@@ -117,12 +117,12 @@ void release_thread(struct task_struct *dead_task)
extern asmlinkage void ret_from_fork(void);
/*
- * copy_thread
+ * copy_thread_tls
* @clone_flags: flags
* @usp: user stack pointer or fn for kernel thread
* @arg: arg to fn for kernel thread; always NULL for userspace thread
* @p: the newly created task
- * @regs: CPU context to copy for userspace thread; always NULL for kthread
+ * @tls: the Thread Local Storage pointer for the new process
*
* At the top of a newly initialized kernel stack are two stacked pt_reg
* structures. The first (topmost) is the userspace context of the thread.
@@ -148,8 +148,8 @@ extern asmlinkage void ret_from_fork(void);
*/
int
-copy_thread(unsigned long clone_flags, unsigned long usp,
- unsigned long arg, struct task_struct *p)
+copy_thread_tls(unsigned long clone_flags, unsigned long usp,
+ unsigned long arg, struct task_struct *p, unsigned long tls)
{
struct pt_regs *userregs;
struct pt_regs *kregs;
@@ -179,16 +179,10 @@ copy_thread(unsigned long clone_flags, unsigned long usp,
userregs->sp = usp;
/*
- * For CLONE_SETTLS set "tp" (r10) to the TLS pointer passed to sys_clone.
- *
- * The kernel entry is:
- * int clone (long flags, void *child_stack, int *parent_tid,
- * int *child_tid, struct void *tls)
- *
- * This makes the source r7 in the kernel registers.
+ * For CLONE_SETTLS set "tp" (r10) to the TLS pointer.
*/
if (clone_flags & CLONE_SETTLS)
- userregs->gpr[10] = userregs->gpr[7];
+ userregs->gpr[10] = tls;
userregs->gpr[11] = 0; /* Result from fork() */
diff --git a/arch/openrisc/kernel/smp.c b/arch/openrisc/kernel/smp.c
index 7d518ee8bddc..bd1e660bbc89 100644
--- a/arch/openrisc/kernel/smp.c
+++ b/arch/openrisc/kernel/smp.c
@@ -14,6 +14,7 @@
#include <linux/smp.h>
#include <linux/cpu.h>
#include <linux/sched.h>
+#include <linux/sched/mm.h>
#include <linux/irq.h>
#include <asm/cpuinfo.h>
#include <asm/mmu_context.h>
@@ -113,7 +114,7 @@ asmlinkage __init void secondary_start_kernel(void)
* All kernel threads share the same mm context; grab a
* reference and switch to it.
*/
- atomic_inc(&mm->mm_count);
+ mmgrab(mm);
current->active_mm = mm;
cpumask_set_cpu(cpu, mm_cpumask(mm));
diff --git a/arch/openrisc/kernel/traps.c b/arch/openrisc/kernel/traps.c
index 932a8ec2b520..c11aa2e17ce0 100644
--- a/arch/openrisc/kernel/traps.c
+++ b/arch/openrisc/kernel/traps.c
@@ -55,13 +55,6 @@ void show_stack(struct task_struct *task, unsigned long *esp)
unwind_stack(NULL, esp, print_trace);
}
-void show_trace_task(struct task_struct *tsk)
-{
- /*
- * TODO: SysRq-T trace dump...
- */
-}
-
void show_registers(struct pt_regs *regs)
{
int i;

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