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authorIngo Molnar <mingo@elte.hu>2008-08-11 13:40:56 +0200
committerIngo Molnar <mingo@elte.hu>2008-08-11 13:40:56 +0200
commit251a169c69d1ff07cee7a9bb9fc4faff6b1d2ac3 (patch)
tree3c20c3e080f276848f2ad67aadab44a5d64bfda9 /kernel
parent6679ce6e5f519096612b480d255d9ca97be0c2be (diff)
parent796aadeb1b2db9b5d463946766c5bbfd7717158c (diff)
Merge branch 'linus' into sched/urgent
Diffstat (limited to 'kernel')
-rw-r--r--kernel/audit.c13
-rw-r--r--kernel/auditfilter.c10
-rw-r--r--kernel/auditsc.c11
-rw-r--r--kernel/cgroup.c39
-rw-r--r--kernel/cpuset.c71
-rw-r--r--kernel/dma-coherent.c5
-rw-r--r--kernel/exit.c6
-rw-r--r--kernel/irq/manage.c3
-rw-r--r--kernel/kgdb.c94
-rw-r--r--kernel/marker.c12
-rw-r--r--kernel/mutex.c1
-rw-r--r--kernel/pm_qos_params.c16
-rw-r--r--kernel/printk.c8
-rw-r--r--kernel/relay.c12
-rw-r--r--kernel/resource.c2
-rw-r--r--kernel/sched.c44
-rw-r--r--kernel/semaphore.c4
-rw-r--r--kernel/workqueue.c13
18 files changed, 239 insertions, 125 deletions
diff --git a/kernel/audit.c b/kernel/audit.c
index e092f1c0ce30..4414e93d8750 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -707,12 +707,14 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
if (status_get->mask & AUDIT_STATUS_ENABLED) {
err = audit_set_enabled(status_get->enabled,
loginuid, sessionid, sid);
- if (err < 0) return err;
+ if (err < 0)
+ return err;
}
if (status_get->mask & AUDIT_STATUS_FAILURE) {
err = audit_set_failure(status_get->failure,
loginuid, sessionid, sid);
- if (err < 0) return err;
+ if (err < 0)
+ return err;
}
if (status_get->mask & AUDIT_STATUS_PID) {
int new_pid = status_get->pid;
@@ -725,9 +727,12 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
audit_pid = new_pid;
audit_nlk_pid = NETLINK_CB(skb).pid;
}
- if (status_get->mask & AUDIT_STATUS_RATE_LIMIT)
+ if (status_get->mask & AUDIT_STATUS_RATE_LIMIT) {
err = audit_set_rate_limit(status_get->rate_limit,
loginuid, sessionid, sid);
+ if (err < 0)
+ return err;
+ }
if (status_get->mask & AUDIT_STATUS_BACKLOG_LIMIT)
err = audit_set_backlog_limit(status_get->backlog_limit,
loginuid, sessionid, sid);
@@ -1366,7 +1371,7 @@ int audit_string_contains_control(const char *string, size_t len)
{
const unsigned char *p;
for (p = string; p < (const unsigned char *)string + len && *p; p++) {
- if (*p == '"' || *p < 0x21 || *p > 0x7f)
+ if (*p == '"' || *p < 0x21 || *p > 0x7e)
return 1;
}
return 0;
diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c
index 98c50cc671bb..b7d354e2b0ef 100644
--- a/kernel/auditfilter.c
+++ b/kernel/auditfilter.c
@@ -1022,8 +1022,11 @@ static void audit_update_watch(struct audit_parent *parent,
struct audit_buffer *ab;
ab = audit_log_start(NULL, GFP_KERNEL,
AUDIT_CONFIG_CHANGE);
+ audit_log_format(ab, "auid=%u ses=%u",
+ audit_get_loginuid(current),
+ audit_get_sessionid(current));
audit_log_format(ab,
- "op=updated rules specifying path=");
+ " op=updated rules specifying path=");
audit_log_untrustedstring(ab, owatch->path);
audit_log_format(ab, " with dev=%u ino=%lu\n",
dev, ino);
@@ -1058,7 +1061,10 @@ static void audit_remove_parent_watches(struct audit_parent *parent)
struct audit_buffer *ab;
ab = audit_log_start(NULL, GFP_KERNEL,
AUDIT_CONFIG_CHANGE);
- audit_log_format(ab, "op=remove rule path=");
+ audit_log_format(ab, "auid=%u ses=%u",
+ audit_get_loginuid(current),
+ audit_get_sessionid(current));
+ audit_log_format(ab, " op=remove rule path=");
audit_log_untrustedstring(ab, w->path);
if (r->filterkey) {
audit_log_format(ab, " key=");
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 4699950e65bd..972f8e61d36a 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -243,6 +243,9 @@ static inline int open_arg(int flags, int mask)
static int audit_match_perm(struct audit_context *ctx, int mask)
{
+ if (unlikely(!ctx))
+ return 0;
+
unsigned n = ctx->major;
switch (audit_classify_syscall(ctx->arch, n)) {
case 0: /* native */
@@ -284,6 +287,10 @@ static int audit_match_filetype(struct audit_context *ctx, int which)
{
unsigned index = which & ~S_IFMT;
mode_t mode = which & S_IFMT;
+
+ if (unlikely(!ctx))
+ return 0;
+
if (index >= ctx->name_count)
return 0;
if (ctx->names[index].ino == -1)
@@ -610,7 +617,7 @@ static int audit_filter_rules(struct task_struct *tsk,
if (!result)
return 0;
}
- if (rule->filterkey)
+ if (rule->filterkey && ctx)
ctx->filterkey = kstrdup(rule->filterkey, GFP_ATOMIC);
switch (rule->action) {
case AUDIT_NEVER: *state = AUDIT_DISABLED; break;
@@ -2375,7 +2382,7 @@ int __audit_signal_info(int sig, struct task_struct *t)
struct audit_context *ctx = tsk->audit_context;
if (audit_pid && t->tgid == audit_pid) {
- if (sig == SIGTERM || sig == SIGHUP || sig == SIGUSR1) {
+ if (sig == SIGTERM || sig == SIGHUP || sig == SIGUSR1 || sig == SIGUSR2) {
audit_sig_pid = tsk->pid;
if (tsk->loginuid != -1)
audit_sig_uid = tsk->loginuid;
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 657f8f8d93a5..13932abde159 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -355,6 +355,17 @@ static struct css_set *find_existing_css_set(
return NULL;
}
+static void free_cg_links(struct list_head *tmp)
+{
+ struct cg_cgroup_link *link;
+ struct cg_cgroup_link *saved_link;
+
+ list_for_each_entry_safe(link, saved_link, tmp, cgrp_link_list) {
+ list_del(&link->cgrp_link_list);
+ kfree(link);
+ }
+}
+
/*
* allocate_cg_links() allocates "count" cg_cgroup_link structures
* and chains them on tmp through their cgrp_link_list fields. Returns 0 on
@@ -363,17 +374,12 @@ static struct css_set *find_existing_css_set(
static int allocate_cg_links(int count, struct list_head *tmp)
{
struct cg_cgroup_link *link;
- struct cg_cgroup_link *saved_link;
int i;
INIT_LIST_HEAD(tmp);
for (i = 0; i < count; i++) {
link = kmalloc(sizeof(*link), GFP_KERNEL);
if (!link) {
- list_for_each_entry_safe(link, saved_link, tmp,
- cgrp_link_list) {
- list_del(&link->cgrp_link_list);
- kfree(link);
- }
+ free_cg_links(tmp);
return -ENOMEM;
}
list_add(&link->cgrp_link_list, tmp);
@@ -381,17 +387,6 @@ static int allocate_cg_links(int count, struct list_head *tmp)
return 0;
}
-static void free_cg_links(struct list_head *tmp)
-{
- struct cg_cgroup_link *link;
- struct cg_cgroup_link *saved_link;
-
- list_for_each_entry_safe(link, saved_link, tmp, cgrp_link_list) {
- list_del(&link->cgrp_link_list);
- kfree(link);
- }
-}
-
/*
* find_css_set() takes an existing cgroup group and a
* cgroup object, and returns a css_set object that's
@@ -956,7 +951,6 @@ static int cgroup_get_sb(struct file_system_type *fs_type,
struct super_block *sb;
struct cgroupfs_root *root;
struct list_head tmp_cg_links;
- INIT_LIST_HEAD(&tmp_cg_links);
/* First find the desired set of subsystems */
ret = parse_cgroupfs_options(data, &opts);
@@ -1424,14 +1418,17 @@ static ssize_t cgroup_write_string(struct cgroup *cgrp, struct cftype *cft,
if (buffer == NULL)
return -ENOMEM;
}
- if (nbytes && copy_from_user(buffer, userbuf, nbytes))
- return -EFAULT;
+ if (nbytes && copy_from_user(buffer, userbuf, nbytes)) {
+ retval = -EFAULT;
+ goto out;
+ }
buffer[nbytes] = 0; /* nul-terminate */
strstrip(buffer);
retval = cft->write_string(cgrp, cft, buffer);
if (!retval)
retval = nbytes;
+out:
if (buffer != local_buffer)
kfree(buffer);
return retval;
@@ -2371,7 +2368,7 @@ static int cgroup_mkdir(struct inode *dir, struct dentry *dentry, int mode)
return cgroup_create(c_parent, dentry, mode | S_IFDIR);
}
-static inline int cgroup_has_css_refs(struct cgroup *cgrp)
+static int cgroup_has_css_refs(struct cgroup *cgrp)
{
/* Check the reference count on each subsystem. Since we
* already established that there are no tasks in the
diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index 91cf85b36dd5..d5ab79cf516d 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -54,7 +54,6 @@
#include <asm/uaccess.h>
#include <asm/atomic.h>
#include <linux/mutex.h>
-#include <linux/kfifo.h>
#include <linux/workqueue.h>
#include <linux/cgroup.h>
@@ -486,13 +485,38 @@ static int cpusets_overlap(struct cpuset *a, struct cpuset *b)
static void
update_domain_attr(struct sched_domain_attr *dattr, struct cpuset *c)
{
- if (!dattr)
- return;
if (dattr->relax_domain_level < c->relax_domain_level)
dattr->relax_domain_level = c->relax_domain_level;
return;
}
+static void
+update_domain_attr_tree(struct sched_domain_attr *dattr, struct cpuset *c)
+{
+ LIST_HEAD(q);
+
+ list_add(&c->stack_list, &q);
+ while (!list_empty(&q)) {
+ struct cpuset *cp;
+ struct cgroup *cont;
+ struct cpuset *child;
+
+ cp = list_first_entry(&q, struct cpuset, stack_list);
+ list_del(q.next);
+
+ if (cpus_empty(cp->cpus_allowed))
+ continue;
+
+ if (is_sched_load_balance(cp))
+ update_domain_attr(dattr, cp);
+
+ list_for_each_entry(cont, &cp->css.cgroup->children, sibling) {
+ child = cgroup_cs(cont);
+ list_add_tail(&child->stack_list, &q);
+ }
+ }
+}
+
/*
* rebuild_sched_domains()
*
@@ -532,7 +556,7 @@ update_domain_attr(struct sched_domain_attr *dattr, struct cpuset *c)
* So the reverse nesting would risk an ABBA deadlock.
*
* The three key local variables below are:
- * q - a kfifo queue of cpuset pointers, used to implement a
+ * q - a linked-list queue of cpuset pointers, used to implement a
* top-down scan of all cpusets. This scan loads a pointer
* to each cpuset marked is_sched_load_balance into the
* array 'csa'. For our purposes, rebuilding the schedulers
@@ -567,7 +591,7 @@ update_domain_attr(struct sched_domain_attr *dattr, struct cpuset *c)
void rebuild_sched_domains(void)
{
- struct kfifo *q; /* queue of cpusets to be scanned */
+ LIST_HEAD(q); /* queue of cpusets to be scanned*/
struct cpuset *cp; /* scans q */
struct cpuset **csa; /* array of all cpuset ptrs */
int csn; /* how many cpuset ptrs in csa so far */
@@ -577,7 +601,6 @@ void rebuild_sched_domains(void)
int ndoms; /* number of sched domains in result */
int nslot; /* next empty doms[] cpumask_t slot */
- q = NULL;
csa = NULL;
doms = NULL;
dattr = NULL;
@@ -591,35 +614,42 @@ void rebuild_sched_domains(void)
dattr = kmalloc(sizeof(struct sched_domain_attr), GFP_KERNEL);
if (dattr) {
*dattr = SD_ATTR_INIT;
- update_domain_attr(dattr, &top_cpuset);
+ update_domain_attr_tree(dattr, &top_cpuset);
}
*doms = top_cpuset.cpus_allowed;
goto rebuild;
}
- q = kfifo_alloc(number_of_cpusets * sizeof(cp), GFP_KERNEL, NULL);
- if (IS_ERR(q))
- goto done;
csa = kmalloc(number_of_cpusets * sizeof(cp), GFP_KERNEL);
if (!csa)
goto done;
csn = 0;
- cp = &top_cpuset;
- __kfifo_put(q, (void *)&cp, sizeof(cp));
- while (__kfifo_get(q, (void *)&cp, sizeof(cp))) {
+ list_add(&top_cpuset.stack_list, &q);
+ while (!list_empty(&q)) {
struct cgroup *cont;
struct cpuset *child; /* scans child cpusets of cp */
+ cp = list_first_entry(&q, struct cpuset, stack_list);
+ list_del(q.next);
+
if (cpus_empty(cp->cpus_allowed))
continue;
- if (is_sched_load_balance(cp))
+ /*
+ * All child cpusets contain a subset of the parent's cpus, so
+ * just skip them, and then we call update_domain_attr_tree()
+ * to calc relax_domain_level of the corresponding sched
+ * domain.
+ */
+ if (is_sched_load_balance(cp)) {
csa[csn++] = cp;
+ continue;
+ }
list_for_each_entry(cont, &cp->css.cgroup->children, sibling) {
child = cgroup_cs(cont);
- __kfifo_put(q, (void *)&child, sizeof(cp));
+ list_add_tail(&child->stack_list, &q);
}
}
@@ -686,7 +716,7 @@ restart:
cpus_or(*dp, *dp, b->cpus_allowed);
b->pn = -1;
if (dattr)
- update_domain_attr(dattr
+ update_domain_attr_tree(dattr
+ nslot, b);
}
}
@@ -702,8 +732,6 @@ rebuild:
put_online_cpus();
done:
- if (q && !IS_ERR(q))
- kfifo_free(q);
kfree(csa);
/* Don't kfree(doms) -- partition_sched_domains() does that. */
/* Don't kfree(dattr) -- partition_sched_domains() does that. */
@@ -1833,24 +1861,21 @@ static void remove_tasks_in_empty_cpuset(struct cpuset *cs)
*/
static void scan_for_empty_cpusets(const struct cpuset *root)
{
+ LIST_HEAD(queue);
struct cpuset *cp; /* scans cpusets being updated */
struct cpuset *child; /* scans child cpusets of cp */
- struct list_head queue;
struct cgroup *cont;
nodemask_t oldmems;
- INIT_LIST_HEAD(&queue);
-
list_add_tail((struct list_head *)&root->stack_list, &queue);
while (!list_empty(&queue)) {
- cp = container_of(queue.next, struct cpuset, stack_list);
+ cp = list_first_entry(&queue, struct cpuset, stack_list);
list_del(queue.next);
list_for_each_entry(cont, &cp->css.cgroup->children, sibling) {
child = cgroup_cs(cont);
list_add_tail(&child->stack_list, &queue);
}
- cont = cp->css.cgroup;
/* Continue past cpusets with all cpus, mems online */
if (cpus_subset(cp->cpus_allowed, cpu_online_map) &&
diff --git a/kernel/dma-coherent.c b/kernel/dma-coherent.c
index 7517115a8cce..91e96950cd52 100644
--- a/kernel/dma-coherent.c
+++ b/kernel/dma-coherent.c
@@ -77,15 +77,14 @@ void *dma_mark_declared_memory_occupied(struct device *dev,
{
struct dma_coherent_mem *mem = dev->dma_mem;
int pos, err;
- int pages = (size + (device_addr & ~PAGE_MASK) + PAGE_SIZE - 1);
- pages >>= PAGE_SHIFT;
+ size += device_addr & ~PAGE_MASK;
if (!mem)
return ERR_PTR(-EINVAL);
pos = (device_addr - mem->device_base) >> PAGE_SHIFT;
- err = bitmap_allocate_region(mem->bitmap, pos, get_order(pages));
+ err = bitmap_allocate_region(mem->bitmap, pos, get_order(size));
if (err != 0)
return ERR_PTR(err);
return mem->virt_base + (pos << PAGE_SHIFT);
diff --git a/kernel/exit.c b/kernel/exit.c
index eb4d6470d1d0..38ec40630149 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -911,10 +911,10 @@ static void exit_notify(struct task_struct *tsk, int group_dead)
tsk->exit_signal = SIGCHLD;
signal = tracehook_notify_death(tsk, &cookie, group_dead);
- if (signal > 0)
+ if (signal >= 0)
signal = do_notify_parent(tsk, signal);
- tsk->exit_state = signal < 0 ? EXIT_DEAD : EXIT_ZOMBIE;
+ tsk->exit_state = signal == DEATH_REAP ? EXIT_DEAD : EXIT_ZOMBIE;
/* mt-exec, de_thread() is waiting for us */
if (thread_group_leader(tsk) &&
@@ -927,7 +927,7 @@ static void exit_notify(struct task_struct *tsk, int group_dead)
tracehook_report_death(tsk, signal, cookie, group_dead);
/* If the process is dead, release it - nobody will wait for it */
- if (signal < 0)
+ if (signal == DEATH_REAP)
release_task(tsk);
}
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 152abfd3589f..0314074fa232 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -323,7 +323,8 @@ static int __irq_set_trigger(struct irq_chip *chip, unsigned int irq,
ret = chip->set_type(irq, flags & IRQF_TRIGGER_MASK);
if (ret)
- pr_err("setting flow type for irq %u failed (%pF)\n",
+ pr_err("setting trigger mode %d for irq %u failed (%pF)\n",
+ (int)(flags & IRQF_TRIGGER_MASK),
irq, chip->set_type);
return ret;
diff --git a/kernel/kgdb.c b/kernel/kgdb.c
index 3ec23c3ec97f..eaa21fc9ad1d 100644
--- a/kernel/kgdb.c
+++ b/kernel/kgdb.c
@@ -56,12 +56,14 @@
static int kgdb_break_asap;
+#define KGDB_MAX_THREAD_QUERY 17
struct kgdb_state {
int ex_vector;
int signo;
int err_code;
int cpu;
int pass_exception;
+ unsigned long thr_query;
unsigned long threadid;
long kgdb_usethreadid;
struct pt_regs *linux_regs;
@@ -166,13 +168,6 @@ early_param("nokgdbroundup", opt_nokgdbroundup);
* Weak aliases for breakpoint management,
* can be overriden by architectures when needed:
*/
-int __weak kgdb_validate_break_address(unsigned long addr)
-{
- char tmp_variable[BREAK_INSTR_SIZE];
-
- return probe_kernel_read(tmp_variable, (char *)addr, BREAK_INSTR_SIZE);
-}
-
int __weak kgdb_arch_set_breakpoint(unsigned long addr, char *saved_instr)
{
int err;
@@ -191,6 +186,25 @@ int __weak kgdb_arch_remove_breakpoint(unsigned long addr, char *bundle)
(char *)bundle, BREAK_INSTR_SIZE);
}
+int __weak kgdb_validate_break_address(unsigned long addr)
+{
+ char tmp_variable[BREAK_INSTR_SIZE];
+ int err;
+ /* Validate setting the breakpoint and then removing it. In the
+ * remove fails, the kernel needs to emit a bad message because we
+ * are deep trouble not being able to put things back the way we
+ * found them.
+ */
+ err = kgdb_arch_set_breakpoint(addr, tmp_variable);
+ if (err)
+ return err;
+ err = kgdb_arch_remove_breakpoint(addr, tmp_variable);
+ if (err)
+ printk(KERN_ERR "KGDB: Critical breakpoint error, kernel "
+ "memory destroyed at: %lx", addr);
+ return err;
+}
+
unsigned long __weak kgdb_arch_pc(int exception, struct pt_regs *regs)
{
return instruction_pointer(regs);
@@ -433,9 +447,14 @@ int kgdb_hex2long(char **ptr, unsigned long *long_val)
{
int hex_val;
int num = 0;
+ int negate = 0;
*long_val = 0;
+ if (**ptr == '-') {
+ negate = 1;
+ (*ptr)++;
+ }
while (**ptr) {
hex_val = hex(**ptr);
if (hex_val < 0)
@@ -446,6 +465,9 @@ int kgdb_hex2long(char **ptr, unsigned long *long_val)
(*ptr)++;
}
+ if (negate)
+ *long_val = -*long_val;
+
return num;
}
@@ -515,10 +537,16 @@ static void int_to_threadref(unsigned char *id, int value)
static struct task_struct *getthread(struct pt_regs *regs, int tid)
{
/*
- * Non-positive TIDs are remapped idle tasks:
+ * Non-positive TIDs are remapped to the cpu shadow information
*/
- if (tid <= 0)
- return idle_task(-tid);
+ if (tid == 0 || tid == -1)
+ tid = -atomic_read(&kgdb_active) - 2;
+ if (tid < 0) {
+ if (kgdb_info[-tid - 2].task)
+ return kgdb_info[-tid - 2].task;
+ else
+ return idle_task(-tid - 2);
+ }
/*
* find_task_by_pid_ns() does not take the tasklist lock anymore
@@ -725,14 +753,15 @@ setundefined:
}
/*
- * Remap normal tasks to their real PID, idle tasks to -1 ... -NR_CPUs:
+ * Remap normal tasks to their real PID,
+ * CPU shadow threads are mapped to -CPU - 2
*/
static inline int shadow_pid(int realpid)
{
if (realpid)
return realpid;
- return -1-raw_smp_processor_id();
+ return -raw_smp_processor_id() - 2;
}
static char gdbmsgbuf[BUFMAX + 1];
@@ -826,7 +855,7 @@ static void gdb_cmd_getregs(struct kgdb_state *ks)
local_debuggerinfo = kgdb_info[ks->cpu].debuggerinfo;
} else {
local_debuggerinfo = NULL;
- for (i = 0; i < NR_CPUS; i++) {
+ for_each_online_cpu(i) {
/*
* Try to find the task on some other
* or possibly this node if we do not
@@ -960,10 +989,13 @@ static int gdb_cmd_reboot(struct kgdb_state *ks)
/* Handle the 'q' query packets */
static void gdb_cmd_query(struct kgdb_state *ks)
{
- struct task_struct *thread;
+ struct task_struct *g;
+ struct task_struct *p;
unsigned char thref[8];
char *ptr;
int i;
+ int cpu;
+ int finished = 0;
switch (remcom_in_buffer[1]) {
case 's':
@@ -973,22 +1005,34 @@ static void gdb_cmd_query(struct kgdb_state *ks)
break;
}
- if (remcom_in_buffer[1] == 'f')
- ks->threadid = 1;
-
+ i = 0;
remcom_out_buffer[0] = 'm';
ptr = remcom_out_buffer + 1;
-
- for (i = 0; i < 17; ks->threadid++) {
- thread = getthread(ks->linux_regs, ks->threadid);
- if (thread) {
- int_to_threadref(thref, ks->threadid);
+ if (remcom_in_buffer[1] == 'f') {
+ /* Each cpu is a shadow thread */
+ for_each_online_cpu(cpu) {
+ ks->thr_query = 0;
+ int_to_threadref(thref, -cpu - 2);
pack_threadid(ptr, thref);
ptr += BUF_THREAD_ID_SIZE;
*(ptr++) = ',';
i++;
}
}
+
+ do_each_thread(g, p) {
+ if (i >= ks->thr_query && !finished) {
+ int_to_threadref(thref, p->pid);
+ pack_threadid(ptr, thref);
+ ptr += BUF_THREAD_ID_SIZE;
+ *(ptr++) = ',';
+ ks->thr_query++;
+ if (ks->thr_query % KGDB_MAX_THREAD_QUERY == 0)
+ finished = 1;
+ }
+ i++;
+ } while_each_thread(g, p);
+
*(--ptr) = '\0';
break;
@@ -1011,15 +1055,15 @@ static void gdb_cmd_query(struct kgdb_state *ks)
error_packet(remcom_out_buffer, -EINVAL);
break;
}
- if (ks->threadid > 0) {
+ if ((int)ks->threadid > 0) {
kgdb_mem2hex(getthread(ks->linux_regs,
ks->threadid)->comm,
remcom_out_buffer, 16);
} else {
static char tmpstr[23 + BUF_THREAD_ID_SIZE];
- sprintf(tmpstr, "Shadow task %d for pid 0",
- (int)(-ks->threadid-1));
+ sprintf(tmpstr, "shadowCPU%d",
+ (int)(-ks->threadid - 2));
kgdb_mem2hex(tmpstr, remcom_out_buffer, strlen(tmpstr));
}
break;
diff --git a/kernel/marker.c b/kernel/marker.c
index 971da5317903..7d1faecd7a51 100644
--- a/kernel/marker.c
+++ b/kernel/marker.c
@@ -126,6 +126,11 @@ void marker_probe_cb(const struct marker *mdata, void *call_private, ...)
struct marker_probe_closure *multi;
int i;
/*
+ * Read mdata->ptype before mdata->multi.
+ */
+ smp_rmb();
+ multi = mdata->multi;
+ /*
* multi points to an array, therefore accessing the array
* depends on reading multi. However, even in this case,
* we must insure that the pointer is read _before_ the array
@@ -133,7 +138,6 @@ void marker_probe_cb(const struct marker *mdata, void *call_private, ...)
* in the fast path, so put the explicit barrier here.
*/
smp_read_barrier_depends();
- multi = mdata->multi;
for (i = 0; multi[i].func; i++) {
va_start(args, call_private);
multi[i].func(multi[i].probe_private, call_private,
@@ -175,6 +179,11 @@ void marker_probe_cb_noarg(const struct marker *mdata, void *call_private, ...)
struct marker_probe_closure *multi;
int i;
/*
+ * Read mdata->ptype before mdata->multi.
+ */
+ smp_rmb();
+ multi = mdata->multi;
+ /*
* multi points to an array, therefore accessing the array
* depends on reading multi. However, even in this case,
* we must insure that the pointer is read _before_ the array
@@ -182,7 +191,6 @@ void marker_probe_cb_noarg(const struct marker *mdata, void *call_private, ...)
* in the fast path, so put the explicit barrier here.
*/
smp_read_barrier_depends();
- multi = mdata->multi;
for (i = 0; multi[i].func; i++)
multi[i].func(multi[i].probe_private, call_private,
mdata->format, &args);
diff --git a/kernel/mutex.c b/kernel/mutex.c
index bcdc9ac8ef60..12c779dc65d4 100644
--- a/kernel/mutex.c
+++ b/kernel/mutex.c
@@ -34,6 +34,7 @@
/***
* mutex_init - initialize the mutex
* @lock: the mutex to be initialized
+ * @key: the lock_class_key for the class; used by mutex lock debugging
*
* Initialize the mutex to unlocked state.
*
diff --git a/kernel/pm_qos_params.c b/kernel/pm_qos_params.c
index 8cb757026386..da9c2dda6a4e 100644
--- a/kernel/pm_qos_params.c
+++ b/kernel/pm_qos_params.c
@@ -24,7 +24,7 @@
* requirement that the application has is cleaned up when closes the file
* pointer or exits the pm_qos_object will get an opportunity to clean up.
*
- * mark gross mgross@linux.intel.com
+ * Mark Gross <mgross@linux.intel.com>
*/
#include <linux/pm_qos_params.h>
@@ -211,8 +211,8 @@ EXPORT_SYMBOL_GPL(pm_qos_requirement);
* @value: defines the qos request
*
* This function inserts a new entry in the pm_qos_class list of requested qos
- * performance charactoistics. It recomputes the agregate QoS expectations for
- * the pm_qos_class of parrameters.
+ * performance characteristics. It recomputes the aggregate QoS expectations
+ * for the pm_qos_class of parameters.
*/
int pm_qos_add_requirement(int pm_qos_class, char *name, s32 value)
{
@@ -250,10 +250,10 @@ EXPORT_SYMBOL_GPL(pm_qos_add_requirement);
* @name: identifies the request
* @value: defines the qos request
*
- * Updates an existing qos requierement for the pm_qos_class of parameters along
+ * Updates an existing qos requirement for the pm_qos_class of parameters along
* with updating the target pm_qos_class value.
*
- * If the named request isn't in the lest then no change is made.
+ * If the named request isn't in the list then no change is made.
*/
int pm_qos_update_requirement(int pm_qos_class, char *name, s32 new_value)
{
@@ -287,7 +287,7 @@ EXPORT_SYMBOL_GPL(pm_qos_update_requirement);
* @pm_qos_class: identifies which list of qos request to us
* @name: identifies the request
*
- * Will remove named qos request from pm_qos_class list of parrameters and
+ * Will remove named qos request from pm_qos_class list of parameters and
* recompute the current target value for the pm_qos_class.
*/
void pm_qos_remove_requirement(int pm_qos_class, char *name)
@@ -319,7 +319,7 @@ EXPORT_SYMBOL_GPL(pm_qos_remove_requirement);
* @notifier: notifier block managed by caller.
*
* will register the notifier into a notification chain that gets called
- * uppon changes to the pm_qos_class target value.
+ * upon changes to the pm_qos_class target value.
*/
int pm_qos_add_notifier(int pm_qos_class, struct notifier_block *notifier)
{
@@ -338,7 +338,7 @@ EXPORT_SYMBOL_GPL(pm_qos_add_notifier);
* @notifier: notifier block to be removed.
*
* will remove the notifier from the notification chain that gets called
- * uppon changes to the pm_qos_class target value.
+ * upon changes to the pm_qos_class target value.
*/
int pm_qos_remove_notifier(int pm_qos_class, struct notifier_block *notifier)
{
diff --git a/kernel/printk.c b/kernel/printk.c
index a7f7559c5f6c..b51b1567bb55 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -1309,14 +1309,14 @@ void tty_write_message(struct tty_struct *tty, char *msg)
#if defined CONFIG_PRINTK
-DEFINE_RATELIMIT_STATE(printk_ratelimit_state, 5 * HZ, 10);
/*
* printk rate limiting, lifted from the networking subsystem.
*
- * This enforces a rate limit: not more than one kernel message
- * every printk_ratelimit_jiffies to make a denial-of-service
- * attack impossible.
+ * This enforces a rate limit: not more than 10 kernel messages
+ * every 5s to make a denial-of-service attack impossible.
*/
+DEFINE_RATELIMIT_STATE(printk_ratelimit_state, 5 * HZ, 10);
+
int printk_ratelimit(void)
{
return __ratelimit(&printk_ratelimit_state);
diff --git a/kernel/relay.c b/kernel/relay.c
index 04006ef970b8..8d13a7855c08 100644
--- a/kernel/relay.c
+++ b/kernel/relay.c
@@ -944,6 +944,10 @@ static void relay_file_read_consume(struct rchan_buf *buf,
size_t n_subbufs = buf->chan->n_subbufs;
size_t read_subbuf;
+ if (buf->subbufs_produced == buf->subbufs_consumed &&
+ buf->offset == buf->bytes_consumed)
+ return;
+
if (buf->bytes_consumed + bytes_consumed > subbuf_size) {
relay_subbufs_consumed(buf->chan, buf->cpu, 1);
buf->bytes_consumed = 0;
@@ -975,6 +979,8 @@ static int relay_file_read_avail(struct rchan_buf *buf, size_t read_pos)
relay_file_read_consume(buf, read_pos, 0);
+ consumed = buf->subbufs_consumed;
+
if (unlikely(buf->offset > subbuf_size)) {
if (produced == consumed)
return 0;
@@ -993,8 +999,12 @@ static int relay_file_read_avail(struct rchan_buf *buf, size_t read_pos)
if (consumed > produced)
produced += n_subbufs * subbuf_size;
- if (consumed == produced)
+ if (consumed == produced) {
+ if (buf->offset == subbuf_size &&
+ buf->subbufs_produced > buf->subbufs_consumed)
+ return 1;
return 0;
+ }
return 1;
}
diff --git a/kernel/resource.c b/kernel/resource.c
index 74af2d7cb5a1..f5b518eabefe 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -490,7 +490,7 @@ resource_size_t resource_alignment(struct resource *res)
{
switch (res->flags & (IORESOURCE_SIZEALIGN | IORESOURCE_STARTALIGN)) {
case IORESOURCE_SIZEALIGN:
- return res->end - res->start + 1;
+ return resource_size(res);
case IORESOURCE_STARTALIGN:
return res->start;
default:
diff --git a/kernel/sched.c b/kernel/sched.c
index 0d1717b00225..f0141947c7d5 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -5004,19 +5004,21 @@ recheck:
return -EPERM;
}
+ if (user) {
#ifdef CONFIG_RT_GROUP_SCHED
- /*
- * Do not allow realtime tasks into groups that have no runtime
- * assigned.
- */
- if (user
- && rt_policy(policy) && task_group(p)->rt_bandwidth.rt_runtime == 0)
- return -EPERM;
+ /*
+ * Do not allow realtime tasks into groups that have no runtime
+ * assigned.
+ */
+ if (rt_policy(policy) && task_group(p)->rt_bandwidth.rt_runtime == 0)
+ return -EPERM;
#endif
- retval = security_task_setscheduler(p, policy, param);
- if (retval)
- return retval;
+ retval = security_task_setscheduler(p, policy, param);
+ if (retval)
+ return retval;
+ }
+
/*
* make sure no PI-waiters arrive (or leave) while we are
* changing the priority of the task:
@@ -7671,34 +7673,34 @@ static ssize_t sched_power_savings_store(const char *buf, size_t count, int smt)
}
#ifdef CONFIG_SCHED_MC
-static ssize_t sched_mc_power_savings_show(struct sys_device *dev,
- struct sysdev_attribute *attr, char *page)
+static ssize_t sched_mc_power_savings_show(struct sysdev_class *class,
+ char *page)
{
return sprintf(page, "%u\n", sched_mc_power_savings);
}
-static ssize_t sched_mc_power_savings_store(struct sys_device *dev,
- struct sysdev_attribute *attr,
+static ssize_t sched_mc_power_savings_store(struct sysdev_class *class,
const char *buf, size_t count)
{
return sched_power_savings_store(buf, count, 0);
}
-static SYSDEV_ATTR(sched_mc_power_savings, 0644, sched_mc_power_savings_show,
- sched_mc_power_savings_store);
+static SYSDEV_CLASS_ATTR(sched_mc_power_savings, 0644,
+ sched_mc_power_savings_show,
+ sched_mc_power_savings_store);
#endif
#ifdef CONFIG_SCHED_SMT
-static ssize_t sched_smt_power_savings_show(struct sys_device *dev,
- struct sysdev_attribute *attr, char *page)
+static ssize_t sched_smt_power_savings_show(struct sysdev_class *dev,
+ char *page)
{
return sprintf(page, "%u\n", sched_smt_power_savings);
}
-static ssize_t sched_smt_power_savings_store(struct sys_device *dev,
- struct sysdev_attribute *attr,
+static ssize_t sched_smt_power_savings_store(struct sysdev_class *dev,
const char *buf, size_t count)
{
return sched_power_savings_store(buf, count, 1);
}
-static SYSDEV_ATTR(sched_smt_power_savings, 0644, sched_smt_power_savings_show,
+static SYSDEV_CLASS_ATTR(sched_smt_power_savings, 0644,
+ sched_smt_power_savings_show,
sched_smt_power_savings_store);
#endif
diff --git a/kernel/semaphore.c b/kernel/semaphore.c
index aaaeae8244e7..94a62c0d4ade 100644
--- a/kernel/semaphore.c
+++ b/kernel/semaphore.c
@@ -212,9 +212,7 @@ static inline int __sched __down_common(struct semaphore *sem, long state,
waiter.up = 0;
for (;;) {
- if (state == TASK_INTERRUPTIBLE && signal_pending(task))
- goto interrupted;
- if (state == TASK_KILLABLE && fatal_signal_pending(task))
+ if (signal_pending_state(state, task))
goto interrupted;
if (timeout <= 0)
goto timed_out;
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index ec7e4f62aaff..4a26a1382df0 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -830,10 +830,21 @@ struct workqueue_struct *__create_workqueue_key(const char *name,
start_workqueue_thread(cwq, -1);
} else {
cpu_maps_update_begin();
+ /*
+ * We must place this wq on list even if the code below fails.
+ * cpu_down(cpu) can remove cpu from cpu_populated_map before
+ * destroy_workqueue() takes the lock, in that case we leak
+ * cwq[cpu]->thread.
+ */
spin_lock(&workqueue_lock);
list_add(&wq->list, &workqueues);
spin_unlock(&workqueue_lock);
-
+ /*
+ * We must initialize cwqs for each possible cpu even if we
+ * are going to call destroy_workqueue() finally. Otherwise
+ * cpu_up() can hit the uninitialized cwq once we drop the
+ * lock.
+ */
for_each_possible_cpu(cpu) {
cwq = init_cpu_workqueue(wq, cpu);
if (err || !cpu_online(cpu))

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