summaryrefslogtreecommitdiffstats
path: root/kernel
diff options
context:
space:
mode:
Diffstat (limited to 'kernel')
-rw-r--r--kernel/exit.c2
-rw-r--r--kernel/fork.c2
-rw-r--r--kernel/futex.c5
-rw-r--r--kernel/irq/manage.c1
-rw-r--r--kernel/kprobes.c134
-rw-r--r--kernel/module.c1
-rw-r--r--kernel/posix-cpu-timers.c6
-rw-r--r--kernel/power/snapshot.c19
-rw-r--r--kernel/power/swsusp.c45
-rw-r--r--kernel/printk.c1
-rw-r--r--kernel/ptrace.c82
-rw-r--r--kernel/sched.c5
-rw-r--r--kernel/softirq.c3
-rw-r--r--kernel/softlockup.c3
-rw-r--r--kernel/sys.c26
-rw-r--r--kernel/sysctl.c5
-rw-r--r--kernel/workqueue.c2
17 files changed, 216 insertions, 126 deletions
diff --git a/kernel/exit.c b/kernel/exit.c
index 537394b25e8..452a1d11617 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -28,6 +28,7 @@
#include <linux/cpuset.h>
#include <linux/syscalls.h>
#include <linux/signal.h>
+#include <linux/cn_proc.h>
#include <asm/uaccess.h>
#include <asm/unistd.h>
@@ -863,6 +864,7 @@ fastcall NORET_TYPE void do_exit(long code)
module_put(tsk->binfmt->module);
tsk->exit_code = code;
+ proc_exit_connector(tsk);
exit_notify(tsk);
#ifdef CONFIG_NUMA
mpol_free(tsk->mempolicy);
diff --git a/kernel/fork.c b/kernel/fork.c
index 8a069612eac..efac2c58ec7 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -42,6 +42,7 @@
#include <linux/profile.h>
#include <linux/rmap.h>
#include <linux/acct.h>
+#include <linux/cn_proc.h>
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
@@ -1143,6 +1144,7 @@ static task_t *copy_process(unsigned long clone_flags,
__get_cpu_var(process_counts)++;
}
+ proc_fork_connector(p);
if (!current->signal->tty && p->signal->tty)
p->signal->tty = NULL;
diff --git a/kernel/futex.c b/kernel/futex.c
index 3b4d5ad44cc..aca8d10704f 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -365,6 +365,11 @@ retry:
if (bh1 != bh2)
spin_unlock(&bh2->lock);
+ if (unlikely(op_ret != -EFAULT)) {
+ ret = op_ret;
+ goto out;
+ }
+
/* futex_atomic_op_inuser needs to both read and write
* *(int __user *)uaddr2, but we can't modify it
* non-atomically. Therefore, if get_user below is not
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 1cfdb08ddf2..3bd7226d15f 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -24,6 +24,7 @@ cpumask_t __cacheline_aligned pending_irq_cpumask[NR_IRQS];
/**
* synchronize_irq - wait for pending IRQ handlers (on other CPUs)
+ * @irq: interrupt number to wait for
*
* This function waits for any pending IRQ handlers for this interrupt
* to complete before returning. If you use this function while
diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index ce4915dd683..5beda378cc7 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -32,7 +32,6 @@
* <prasanna@in.ibm.com> added function-return probes.
*/
#include <linux/kprobes.h>
-#include <linux/spinlock.h>
#include <linux/hash.h>
#include <linux/init.h>
#include <linux/slab.h>
@@ -49,9 +48,9 @@
static struct hlist_head kprobe_table[KPROBE_TABLE_SIZE];
static struct hlist_head kretprobe_inst_table[KPROBE_TABLE_SIZE];
-unsigned int kprobe_cpu = NR_CPUS;
-static DEFINE_SPINLOCK(kprobe_lock);
-static struct kprobe *curr_kprobe;
+static DEFINE_SPINLOCK(kprobe_lock); /* Protects kprobe_table */
+DEFINE_SPINLOCK(kretprobe_lock); /* Protects kretprobe_inst_table */
+static DEFINE_PER_CPU(struct kprobe *, kprobe_instance) = NULL;
/*
* kprobe->ainsn.insn points to the copy of the instruction to be
@@ -153,50 +152,31 @@ void __kprobes free_insn_slot(kprobe_opcode_t *slot)
}
}
-/* Locks kprobe: irqs must be disabled */
-void __kprobes lock_kprobes(void)
+/* We have preemption disabled.. so it is safe to use __ versions */
+static inline void set_kprobe_instance(struct kprobe *kp)
{
- unsigned long flags = 0;
-
- /* Avoiding local interrupts to happen right after we take the kprobe_lock
- * and before we get a chance to update kprobe_cpu, this to prevent
- * deadlock when we have a kprobe on ISR routine and a kprobe on task
- * routine
- */
- local_irq_save(flags);
-
- spin_lock(&kprobe_lock);
- kprobe_cpu = smp_processor_id();
-
- local_irq_restore(flags);
+ __get_cpu_var(kprobe_instance) = kp;
}
-void __kprobes unlock_kprobes(void)
+static inline void reset_kprobe_instance(void)
{
- unsigned long flags = 0;
-
- /* Avoiding local interrupts to happen right after we update
- * kprobe_cpu and before we get a a chance to release kprobe_lock,
- * this to prevent deadlock when we have a kprobe on ISR routine and
- * a kprobe on task routine
- */
- local_irq_save(flags);
-
- kprobe_cpu = NR_CPUS;
- spin_unlock(&kprobe_lock);
-
- local_irq_restore(flags);
+ __get_cpu_var(kprobe_instance) = NULL;
}
-/* You have to be holding the kprobe_lock */
+/*
+ * This routine is called either:
+ * - under the kprobe_lock spinlock - during kprobe_[un]register()
+ * OR
+ * - with preemption disabled - from arch/xxx/kernel/kprobes.c
+ */
struct kprobe __kprobes *get_kprobe(void *addr)
{
struct hlist_head *head;
struct hlist_node *node;
+ struct kprobe *p;
head = &kprobe_table[hash_ptr(addr, KPROBE_HASH_BITS)];
- hlist_for_each(node, head) {
- struct kprobe *p = hlist_entry(node, struct kprobe, hlist);
+ hlist_for_each_entry_rcu(p, node, head, hlist) {
if (p->addr == addr)
return p;
}
@@ -211,13 +191,13 @@ static int __kprobes aggr_pre_handler(struct kprobe *p, struct pt_regs *regs)
{
struct kprobe *kp;
- list_for_each_entry(kp, &p->list, list) {
+ list_for_each_entry_rcu(kp, &p->list, list) {
if (kp->pre_handler) {
- curr_kprobe = kp;
+ set_kprobe_instance(kp);
if (kp->pre_handler(kp, regs))
return 1;
}
- curr_kprobe = NULL;
+ reset_kprobe_instance();
}
return 0;
}
@@ -227,11 +207,11 @@ static void __kprobes aggr_post_handler(struct kprobe *p, struct pt_regs *regs,
{
struct kprobe *kp;
- list_for_each_entry(kp, &p->list, list) {
+ list_for_each_entry_rcu(kp, &p->list, list) {
if (kp->post_handler) {
- curr_kprobe = kp;
+ set_kprobe_instance(kp);
kp->post_handler(kp, regs, flags);
- curr_kprobe = NULL;
+ reset_kprobe_instance();
}
}
return;
@@ -240,12 +220,14 @@ static void __kprobes aggr_post_handler(struct kprobe *p, struct pt_regs *regs,
static int __kprobes aggr_fault_handler(struct kprobe *p, struct pt_regs *regs,
int trapnr)
{
+ struct kprobe *cur = __get_cpu_var(kprobe_instance);
+
/*
* if we faulted "during" the execution of a user specified
* probe handler, invoke just that probe's fault handler
*/
- if (curr_kprobe && curr_kprobe->fault_handler) {
- if (curr_kprobe->fault_handler(curr_kprobe, regs, trapnr))
+ if (cur && cur->fault_handler) {
+ if (cur->fault_handler(cur, regs, trapnr))
return 1;
}
return 0;
@@ -253,17 +235,18 @@ static int __kprobes aggr_fault_handler(struct kprobe *p, struct pt_regs *regs,
static int __kprobes aggr_break_handler(struct kprobe *p, struct pt_regs *regs)
{
- struct kprobe *kp = curr_kprobe;
- if (curr_kprobe && kp->break_handler) {
- if (kp->break_handler(kp, regs)) {
- curr_kprobe = NULL;
- return 1;
- }
+ struct kprobe *cur = __get_cpu_var(kprobe_instance);
+ int ret = 0;
+
+ if (cur && cur->break_handler) {
+ if (cur->break_handler(cur, regs))
+ ret = 1;
}
- curr_kprobe = NULL;
- return 0;
+ reset_kprobe_instance();
+ return ret;
}
+/* Called with kretprobe_lock held */
struct kretprobe_instance __kprobes *get_free_rp_inst(struct kretprobe *rp)
{
struct hlist_node *node;
@@ -273,6 +256,7 @@ struct kretprobe_instance __kprobes *get_free_rp_inst(struct kretprobe *rp)
return NULL;
}
+/* Called with kretprobe_lock held */
static struct kretprobe_instance __kprobes *get_used_rp_inst(struct kretprobe
*rp)
{
@@ -283,6 +267,7 @@ static struct kretprobe_instance __kprobes *get_used_rp_inst(struct kretprobe
return NULL;
}
+/* Called with kretprobe_lock held */
void __kprobes add_rp_inst(struct kretprobe_instance *ri)
{
/*
@@ -301,6 +286,7 @@ void __kprobes add_rp_inst(struct kretprobe_instance *ri)
hlist_add_head(&ri->uflist, &ri->rp->used_instances);
}
+/* Called with kretprobe_lock held */
void __kprobes recycle_rp_inst(struct kretprobe_instance *ri)
{
/* remove rp inst off the rprobe_inst_table */
@@ -334,13 +320,13 @@ void __kprobes kprobe_flush_task(struct task_struct *tk)
struct hlist_node *node, *tmp;
unsigned long flags = 0;
- spin_lock_irqsave(&kprobe_lock, flags);
+ spin_lock_irqsave(&kretprobe_lock, flags);
head = kretprobe_inst_table_head(current);
hlist_for_each_entry_safe(ri, node, tmp, head, hlist) {
if (ri->task == tk)
recycle_rp_inst(ri);
}
- spin_unlock_irqrestore(&kprobe_lock, flags);
+ spin_unlock_irqrestore(&kretprobe_lock, flags);
}
/*
@@ -351,9 +337,12 @@ static int __kprobes pre_handler_kretprobe(struct kprobe *p,
struct pt_regs *regs)
{
struct kretprobe *rp = container_of(p, struct kretprobe, kp);
+ unsigned long flags = 0;
/*TODO: consider to only swap the RA after the last pre_handler fired */
+ spin_lock_irqsave(&kretprobe_lock, flags);
arch_prepare_kretprobe(rp, regs);
+ spin_unlock_irqrestore(&kretprobe_lock, flags);
return 0;
}
@@ -384,13 +373,13 @@ static int __kprobes add_new_kprobe(struct kprobe *old_p, struct kprobe *p)
struct kprobe *kp;
if (p->break_handler) {
- list_for_each_entry(kp, &old_p->list, list) {
+ list_for_each_entry_rcu(kp, &old_p->list, list) {
if (kp->break_handler)
return -EEXIST;
}
- list_add_tail(&p->list, &old_p->list);
+ list_add_tail_rcu(&p->list, &old_p->list);
} else
- list_add(&p->list, &old_p->list);
+ list_add_rcu(&p->list, &old_p->list);
return 0;
}
@@ -408,18 +397,18 @@ static inline void add_aggr_kprobe(struct kprobe *ap, struct kprobe *p)
ap->break_handler = aggr_break_handler;
INIT_LIST_HEAD(&ap->list);
- list_add(&p->list, &ap->list);
+ list_add_rcu(&p->list, &ap->list);
INIT_HLIST_NODE(&ap->hlist);
- hlist_del(&p->hlist);
- hlist_add_head(&ap->hlist,
+ hlist_del_rcu(&p->hlist);
+ hlist_add_head_rcu(&ap->hlist,
&kprobe_table[hash_ptr(ap->addr, KPROBE_HASH_BITS)]);
}
/*
* This is the second or subsequent kprobe at the address - handle
* the intricacies
- * TODO: Move kcalloc outside the spinlock
+ * TODO: Move kcalloc outside the spin_lock
*/
static int __kprobes register_aggr_kprobe(struct kprobe *old_p,
struct kprobe *p)
@@ -445,7 +434,7 @@ static int __kprobes register_aggr_kprobe(struct kprobe *old_p,
static inline void cleanup_kprobe(struct kprobe *p, unsigned long flags)
{
arch_disarm_kprobe(p);
- hlist_del(&p->hlist);
+ hlist_del_rcu(&p->hlist);
spin_unlock_irqrestore(&kprobe_lock, flags);
arch_remove_kprobe(p);
}
@@ -453,11 +442,10 @@ static inline void cleanup_kprobe(struct kprobe *p, unsigned long flags)
static inline void cleanup_aggr_kprobe(struct kprobe *old_p,
struct kprobe *p, unsigned long flags)
{
- list_del(&p->list);
- if (list_empty(&old_p->list)) {
+ list_del_rcu(&p->list);
+ if (list_empty(&old_p->list))
cleanup_kprobe(old_p, flags);
- kfree(old_p);
- } else
+ else
spin_unlock_irqrestore(&kprobe_lock, flags);
}
@@ -480,9 +468,9 @@ int __kprobes register_kprobe(struct kprobe *p)
if ((ret = arch_prepare_kprobe(p)) != 0)
goto rm_kprobe;
+ p->nmissed = 0;
spin_lock_irqsave(&kprobe_lock, flags);
old_p = get_kprobe(p->addr);
- p->nmissed = 0;
if (old_p) {
ret = register_aggr_kprobe(old_p, p);
goto out;
@@ -490,7 +478,7 @@ int __kprobes register_kprobe(struct kprobe *p)
arch_copy_kprobe(p);
INIT_HLIST_NODE(&p->hlist);
- hlist_add_head(&p->hlist,
+ hlist_add_head_rcu(&p->hlist,
&kprobe_table[hash_ptr(p->addr, KPROBE_HASH_BITS)]);
arch_arm_kprobe(p);
@@ -511,10 +499,16 @@ void __kprobes unregister_kprobe(struct kprobe *p)
spin_lock_irqsave(&kprobe_lock, flags);
old_p = get_kprobe(p->addr);
if (old_p) {
+ /* cleanup_*_kprobe() does the spin_unlock_irqrestore */
if (old_p->pre_handler == aggr_pre_handler)
cleanup_aggr_kprobe(old_p, p, flags);
else
cleanup_kprobe(p, flags);
+
+ synchronize_sched();
+ if (old_p->pre_handler == aggr_pre_handler &&
+ list_empty(&old_p->list))
+ kfree(old_p);
} else
spin_unlock_irqrestore(&kprobe_lock, flags);
}
@@ -591,13 +585,13 @@ void __kprobes unregister_kretprobe(struct kretprobe *rp)
unregister_kprobe(&rp->kp);
/* No race here */
- spin_lock_irqsave(&kprobe_lock, flags);
+ spin_lock_irqsave(&kretprobe_lock, flags);
free_rp_inst(rp);
while ((ri = get_used_rp_inst(rp)) != NULL) {
ri->rp = NULL;
hlist_del(&ri->uflist);
}
- spin_unlock_irqrestore(&kprobe_lock, flags);
+ spin_unlock_irqrestore(&kretprobe_lock, flags);
}
static int __init init_kprobes(void)
diff --git a/kernel/module.c b/kernel/module.c
index ff5c500ab62..2ea929d51ad 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -37,6 +37,7 @@
#include <linux/stop_machine.h>
#include <linux/device.h>
#include <linux/string.h>
+#include <linux/sched.h>
#include <asm/uaccess.h>
#include <asm/semaphore.h>
#include <asm/cacheflush.h>
diff --git a/kernel/posix-cpu-timers.c b/kernel/posix-cpu-timers.c
index 91a89426494..84af54c39e1 100644
--- a/kernel/posix-cpu-timers.c
+++ b/kernel/posix-cpu-timers.c
@@ -497,7 +497,7 @@ static void process_timer_rebalance(struct task_struct *p,
left = cputime_div(cputime_sub(expires.cpu, val.cpu),
nthreads);
do {
- if (!unlikely(t->flags & PF_EXITING)) {
+ if (likely(!(t->flags & PF_EXITING))) {
ticks = cputime_add(prof_ticks(t), left);
if (cputime_eq(t->it_prof_expires,
cputime_zero) ||
@@ -512,7 +512,7 @@ static void process_timer_rebalance(struct task_struct *p,
left = cputime_div(cputime_sub(expires.cpu, val.cpu),
nthreads);
do {
- if (!unlikely(t->flags & PF_EXITING)) {
+ if (likely(!(t->flags & PF_EXITING))) {
ticks = cputime_add(virt_ticks(t), left);
if (cputime_eq(t->it_virt_expires,
cputime_zero) ||
@@ -527,7 +527,7 @@ static void process_timer_rebalance(struct task_struct *p,
nsleft = expires.sched - val.sched;
do_div(nsleft, nthreads);
do {
- if (!unlikely(t->flags & PF_EXITING)) {
+ if (likely(!(t->flags & PF_EXITING))) {
ns = t->sched_time + nsleft;
if (t->it_sched_expires == 0 ||
t->it_sched_expires > ns) {
diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c
index 42a62870439..723f5179883 100644
--- a/kernel/power/snapshot.c
+++ b/kernel/power/snapshot.c
@@ -168,9 +168,8 @@ static unsigned count_data_pages(void)
{
struct zone *zone;
unsigned long zone_pfn;
- unsigned n;
+ unsigned int n = 0;
- n = 0;
for_each_zone (zone) {
if (is_highmem(zone))
continue;
@@ -250,10 +249,10 @@ static inline void fill_pb_page(struct pbe *pbpage)
* of memory pages allocated with alloc_pagedir()
*/
-void create_pbe_list(struct pbe *pblist, unsigned nr_pages)
+void create_pbe_list(struct pbe *pblist, unsigned int nr_pages)
{
struct pbe *pbpage, *p;
- unsigned num = PBES_PER_PAGE;
+ unsigned int num = PBES_PER_PAGE;
for_each_pb_page (pbpage, pblist) {
if (num >= nr_pages)
@@ -293,9 +292,9 @@ static void *alloc_image_page(void)
* On each page we set up a list of struct_pbe elements.
*/
-struct pbe *alloc_pagedir(unsigned nr_pages)
+struct pbe *alloc_pagedir(unsigned int nr_pages)
{
- unsigned num;
+ unsigned int num;
struct pbe *pblist, *pbe;
if (!nr_pages)
@@ -329,7 +328,7 @@ void swsusp_free(void)
for_each_zone(zone) {
for (zone_pfn = 0; zone_pfn < zone->spanned_pages; ++zone_pfn)
if (pfn_valid(zone_pfn + zone->zone_start_pfn)) {
- struct page * page;
+ struct page *page;
page = pfn_to_page(zone_pfn + zone->zone_start_pfn);
if (PageNosave(page) && PageNosaveFree(page)) {
ClearPageNosave(page);
@@ -348,7 +347,7 @@ void swsusp_free(void)
* free pages.
*/
-static int enough_free_mem(unsigned nr_pages)
+static int enough_free_mem(unsigned int nr_pages)
{
pr_debug("swsusp: available memory: %u pages\n", nr_free_pages());
return nr_free_pages() > (nr_pages + PAGES_FOR_IO +
@@ -356,7 +355,7 @@ static int enough_free_mem(unsigned nr_pages)
}
-static struct pbe *swsusp_alloc(unsigned nr_pages)
+static struct pbe *swsusp_alloc(unsigned int nr_pages)
{
struct pbe *pblist, *p;
@@ -380,7 +379,7 @@ static struct pbe *swsusp_alloc(unsigned nr_pages)
asmlinkage int swsusp_save(void)
{
- unsigned nr_pages;
+ unsigned int nr_pages;
pr_debug("swsusp: critical section: \n");
if (save_highmem()) {
diff --git a/kernel/power/swsusp.c b/kernel/power/swsusp.c
index 12db1d2ad61..e1ab28b9b21 100644
--- a/kernel/power/swsusp.c
+++ b/kernel/power/swsusp.c
@@ -85,18 +85,11 @@ unsigned int nr_copy_pages __nosavedata = 0;
/* Suspend pagedir is allocated before final copy, therefore it
must be freed after resume
- Warning: this is evil. There are actually two pagedirs at time of
- resume. One is "pagedir_save", which is empty frame allocated at
- time of suspend, that must be freed. Second is "pagedir_nosave",
- allocated at time of resume, that travels through memory not to
- collide with anything.
-
Warning: this is even more evil than it seems. Pagedirs this file
talks about are completely different from page directories used by
MMU hardware.
*/
suspend_pagedir_t *pagedir_nosave __nosavedata = NULL;
-suspend_pagedir_t *pagedir_save;
#define SWSUSP_SIG "S1SUSPEND"
@@ -122,8 +115,8 @@ static struct swsusp_info swsusp_info;
static unsigned short swapfile_used[MAX_SWAPFILES];
static unsigned short root_swap;
-static int write_page(unsigned long addr, swp_entry_t * loc);
-static int bio_read_page(pgoff_t page_off, void * page);
+static int write_page(unsigned long addr, swp_entry_t *loc);
+static int bio_read_page(pgoff_t page_off, void *page);
static u8 key_iv[MAXKEY+MAXIV];
@@ -355,7 +348,7 @@ static void lock_swapdevices(void)
* This is a partial improvement, since we will at least return other
* errors, though we need to eventually fix the damn code.
*/
-static int write_page(unsigned long addr, swp_entry_t * loc)
+static int write_page(unsigned long addr, swp_entry_t *loc)
{
swp_entry_t entry;
int error = 0;
@@ -383,9 +376,9 @@ static int write_page(unsigned long addr, swp_entry_t * loc)
static void data_free(void)
{
swp_entry_t entry;
- struct pbe * p;
+ struct pbe *p;
- for_each_pbe(p, pagedir_nosave) {
+ for_each_pbe (p, pagedir_nosave) {
entry = p->swap_address;
if (entry.val)
swap_free(entry);
@@ -492,8 +485,8 @@ static void free_pagedir_entries(void)
static int write_pagedir(void)
{
int error = 0;
- unsigned n = 0;
- struct pbe * pbe;
+ unsigned int n = 0;
+ struct pbe *pbe;
printk( "Writing pagedir...");
for_each_pb_page (pbe, pagedir_nosave) {
@@ -543,7 +536,7 @@ static int write_suspend_image(void)
* We should only consider resume_device.
*/
-int enough_swap(unsigned nr_pages)
+int enough_swap(unsigned int nr_pages)
{
struct sysinfo i;
@@ -694,7 +687,7 @@ static int check_pagedir(struct pbe *pblist)
* restore from the loaded pages later. We relocate them here.
*/
-static struct pbe * swsusp_pagedir_relocate(struct pbe *pblist)
+static struct pbe *swsusp_pagedir_relocate(struct pbe *pblist)
{
struct zone *zone;
unsigned long zone_pfn;
@@ -770,7 +763,7 @@ static struct pbe * swsusp_pagedir_relocate(struct pbe *pblist)
static atomic_t io_done = ATOMIC_INIT(0);
-static int end_io(struct bio * bio, unsigned int num, int err)
+static int end_io(struct bio *bio, unsigned int num, int err)
{
if (!test_bit(BIO_UPTODATE, &bio->bi_flags))
panic("I/O error reading memory image");
@@ -778,7 +771,7 @@ static int end_io(struct bio * bio, unsigned int num, int err)
return 0;
}
-static struct block_device * resume_bdev;
+static struct block_device *resume_bdev;
/**
* submit - submit BIO request.
@@ -791,10 +784,10 @@ static struct block_device * resume_bdev;
* Then submit it and wait.
*/
-static int submit(int rw, pgoff_t page_off, void * page)
+static int submit(int rw, pgoff_t page_off, void *page)
{
int error = 0;
- struct bio * bio;
+ struct bio *bio;
bio = bio_alloc(GFP_ATOMIC, 1);
if (!bio)
@@ -823,12 +816,12 @@ static int submit(int rw, pgoff_t page_off, void * page)
return error;
}
-static int bio_read_page(pgoff_t page_off, void * page)
+static int bio_read_page(pgoff_t page_off, void *page)
{
return submit(READ, page_off, page);
}
-static int bio_write_page(pgoff_t page_off, void * page)
+static int bio_write_page(pgoff_t page_off, void *page)
{
return submit(WRITE, page_off, page);
}
@@ -838,7 +831,7 @@ static int bio_write_page(pgoff_t page_off, void * page)
* I really don't think that it's foolproof but more than nothing..
*/
-static const char * sanity_check(void)
+static const char *sanity_check(void)
{
dump_info();
if (swsusp_info.version_code != LINUX_VERSION_CODE)
@@ -864,7 +857,7 @@ static const char * sanity_check(void)
static int check_header(void)
{
- const char * reason = NULL;
+ const char *reason = NULL;
int error;
if ((error = bio_read_page(swp_offset(swsusp_header.swsusp_info), &swsusp_info)))
@@ -912,7 +905,7 @@ static int check_sig(void)
static int data_read(struct pbe *pblist)
{
- struct pbe * p;
+ struct pbe *p;
int error = 0;
int i = 0;
int mod = swsusp_info.image_pages / 100;
@@ -950,7 +943,7 @@ static int data_read(struct pbe *pblist)
static int read_pagedir(struct pbe *pblist)
{
struct pbe *pbpage, *p;
- unsigned i = 0;
+ unsigned int i = 0;
int error;
if (!pblist)
diff --git a/kernel/printk.c b/kernel/printk.c
index 3cb9708209b..e9be027bc93 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -806,7 +806,6 @@ void console_unblank(void)
c->unblank();
release_console_sem();
}
-EXPORT_SYMBOL(console_unblank);
/*
* Return the console tty driver structure and its associated index
diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index 863eee8bff4..5b8dd98a230 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -406,3 +406,85 @@ int ptrace_request(struct task_struct *child, long request,
return ret;
}
+
+#ifndef __ARCH_SYS_PTRACE
+static int ptrace_get_task_struct(long request, long pid,
+ struct task_struct **childp)
+{
+ struct task_struct *child;
+ int ret;
+
+ /*
+ * Callers use child == NULL as an indication to exit early even
+ * when the return value is 0, so make sure it is non-NULL here.
+ */
+ *childp = NULL;
+
+ if (request == PTRACE_TRACEME) {
+ /*
+ * Are we already being traced?
+ */
+ if (current->ptrace & PT_PTRACED)
+ return -EPERM;
+ ret = security_ptrace(current->parent, current);
+ if (ret)
+ return -EPERM;
+ /*
+ * Set the ptrace bit in the process ptrace flags.
+ */
+ current->ptrace |= PT_PTRACED;
+ return 0;
+ }
+
+ /*
+ * You may not mess with init
+ */
+ if (pid == 1)
+ return -EPERM;
+
+ ret = -ESRCH;
+ read_lock(&tasklist_lock);
+ child = find_task_by_pid(pid);
+ if (child)
+ get_task_struct(child);
+ read_unlock(&tasklist_lock);
+ if (!child)
+ return -ESRCH;
+
+ *childp = child;
+ return 0;
+}
+
+asmlinkage long sys_ptrace(long request, long pid, long addr, long data)
+{
+ struct task_struct *child;
+ long ret;
+
+ /*
+ * This lock_kernel fixes a subtle race with suid exec
+ */
+ lock_kernel();
+ ret = ptrace_get_task_struct(request, pid, &child);
+ if (!child)
+ goto out;
+
+ if (request == PTRACE_ATTACH) {
+ ret = ptrace_attach(child);
+ goto out;
+ }
+
+ ret = ptrace_check_attach(child, request == PTRACE_KILL);
+ if (ret < 0)
+ goto out_put_task_struct;
+
+ ret = arch_ptrace(child, request, addr, data);
+ if (ret < 0)
+ goto out_put_task_struct;
+
+ out_put_task_struct:
+ put_task_struct(child);
+ out:
+ unlock_kernel();
+ return ret;
+}
+#endif /* __ARCH_SYS_PTRACE */
diff --git a/kernel/sched.c b/kernel/sched.c
index b4f4eb61353..3ce26954be1 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -3563,8 +3563,6 @@ int idle_cpu(int cpu)
return cpu_curr(cpu) == cpu_rq(cpu)->idle;
}
-EXPORT_SYMBOL_GPL(idle_cpu);
-
/**
* idle_task - return the idle task for a given cpu.
* @cpu: the processor in question.
@@ -4680,7 +4678,8 @@ static int migration_call(struct notifier_block *nfb, unsigned long action,
#ifdef CONFIG_HOTPLUG_CPU
case CPU_UP_CANCELED:
/* Unbind it from offline cpu so it can run. Fall thru. */
- kthread_bind(cpu_rq(cpu)->migration_thread,smp_processor_id());
+ kthread_bind(cpu_rq(cpu)->migration_thread,
+ any_online_cpu(cpu_online_map));
kthread_stop(cpu_rq(cpu)->migration_thread);
cpu_rq(cpu)->migration_thread = NULL;
break;
diff --git a/kernel/softirq.c b/kernel/softirq.c
index f766b2fc48b..ad3295cdded 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -470,7 +470,8 @@ static int __devinit cpu_callback(struct notifier_block *nfb,
#ifdef CONFIG_HOTPLUG_CPU
case CPU_UP_CANCELED:
/* Unbind so it can run. Fall thru. */
- kthread_bind(per_cpu(ksoftirqd, hotcpu), smp_processor_id());
+ kthread_bind(per_cpu(ksoftirqd, hotcpu),
+ any_online_cpu(cpu_online_map));
case CPU_DEAD:
p = per_cpu(ksoftirqd, hotcpu);
per_cpu(ksoftirqd, hotcpu) = NULL;
diff --git a/kernel/softlockup.c b/kernel/softlockup.c
index 75976209cea..a2dcceb9437 100644
--- a/kernel/softlockup.c
+++ b/kernel/softlockup.c
@@ -123,7 +123,8 @@ cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu)
#ifdef CONFIG_HOTPLUG_CPU
case CPU_UP_CANCELED:
/* Unbind so it can run. Fall thru. */
- kthread_bind(per_cpu(watchdog_task, hotcpu), smp_processor_id());
+ kthread_bind(per_cpu(watchdog_task, hotcpu),
+ any_online_cpu(cpu_online_map));
case CPU_DEAD:
p = per_cpu(watchdog_task, hotcpu);
per_cpu(watchdog_task, hotcpu) = NULL;
diff --git a/kernel/sys.c b/kernel/sys.c
index 2fa1ed18123..c43b3e22bbd 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -28,6 +28,7 @@
#include <linux/suspend.h>
#include <linux/tty.h>
#include <linux/signal.h>
+#include <linux/cn_proc.h>
#include <linux/compat.h>
#include <linux/syscalls.h>
@@ -375,18 +376,21 @@ void emergency_restart(void)
}
EXPORT_SYMBOL_GPL(emergency_restart);
-/**
- * kernel_restart - reboot the system
- *
- * Shutdown everything and perform a clean reboot.
- * This is not safe to call in interrupt context.
- */
void kernel_restart_prepare(char *cmd)
{
notifier_call_chain(&reboot_notifier_list, SYS_RESTART, cmd);
system_state = SYSTEM_RESTART;
device_shutdown();
}
+
+/**
+ * kernel_restart - reboot the system
+ * @cmd: pointer to buffer containing command to execute for restart
+ * or %NULL
+ *
+ * Shutdown everything and perform a clean reboot.
+ * This is not safe to call in interrupt context.
+ */
void kernel_restart(char *cmd)
{
kernel_restart_prepare(cmd);
@@ -623,6 +627,7 @@ asmlinkage long sys_setregid(gid_t rgid, gid_t egid)
current->egid = new_egid;
current->gid = new_rgid;
key_fsgid_changed(current);
+ proc_id_connector(current, PROC_EVENT_GID);
return 0;
}
@@ -662,6 +667,7 @@ asmlinkage long sys_setgid(gid_t gid)
return -EPERM;
key_fsgid_changed(current);
+ proc_id_connector(current, PROC_EVENT_GID);
return 0;
}
@@ -751,6 +757,7 @@ asmlinkage long sys_setreuid(uid_t ruid, uid_t euid)
current->fsuid = current->euid;
key_fsuid_changed(current);
+ proc_id_connector(current, PROC_EVENT_UID);
return security_task_post_setuid(old_ruid, old_euid, old_suid, LSM_SETID_RE);
}
@@ -798,6 +805,7 @@ asmlinkage long sys_setuid(uid_t uid)
current->suid = new_suid;
key_fsuid_changed(current);
+ proc_id_connector(current, PROC_EVENT_UID);
return security_task_post_setuid(old_ruid, old_euid, old_suid, LSM_SETID_ID);
}
@@ -846,6 +854,7 @@ asmlinkage long sys_setresuid(uid_t ruid, uid_t euid, uid_t suid)
current->suid = suid;
key_fsuid_changed(current);
+ proc_id_connector(current, PROC_EVENT_UID);
return security_task_post_setuid(old_ruid, old_euid, old_suid, LSM_SETID_RES);
}
@@ -898,6 +907,7 @@ asmlinkage long sys_setresgid(gid_t rgid, gid_t egid, gid_t sgid)
current->sgid = sgid;
key_fsgid_changed(current);
+ proc_id_connector(current, PROC_EVENT_GID);
return 0;
}
@@ -940,6 +950,7 @@ asmlinkage long sys_setfsuid(uid_t uid)
}
key_fsuid_changed(current);
+ proc_id_connector(current, PROC_EVENT_UID);
security_task_post_setuid(old_fsuid, (uid_t)-1, (uid_t)-1, LSM_SETID_FS);
@@ -968,6 +979,7 @@ asmlinkage long sys_setfsgid(gid_t gid)
}
current->fsgid = gid;
key_fsgid_changed(current);
+ proc_id_connector(current, PROC_EVENT_GID);
}
return old_fsgid;
}
@@ -1485,8 +1497,6 @@ EXPORT_SYMBOL(in_egroup_p);
DECLARE_RWSEM(uts_sem);
-EXPORT_SYMBOL(uts_sem);
-
asmlinkage long sys_newuname(struct new_utsname __user * name)
{
int errno = 0;
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 8e56e249554..c4f35f96884 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -952,7 +952,7 @@ static ctl_table fs_table[] = {
.data = &aio_nr,
.maxlen = sizeof(aio_nr),
.mode = 0444,
- .proc_handler = &proc_dointvec,
+ .proc_handler = &proc_doulongvec_minmax,
},
{
.ctl_name = FS_AIO_MAX_NR,
@@ -960,7 +960,7 @@ static ctl_table fs_table[] = {
.data = &aio_max_nr,
.maxlen = sizeof(aio_max_nr),
.mode = 0644,
- .proc_handler = &proc_dointvec,
+ .proc_handler = &proc_doulongvec_minmax,
},
#ifdef CONFIG_INOTIFY
{
@@ -1997,6 +1997,7 @@ int proc_dointvec_jiffies(ctl_table *table, int write, struct file *filp,
* @filp: the file structure
* @buffer: the user buffer
* @lenp: the size of the user buffer
+ * @ppos: pointer to the file position
*
* Reads/writes up to table->maxlen/sizeof(unsigned int) integer
* values from/to the user buffer, treated as an ASCII string.
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 7cee222231b..42df83d7fad 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -524,7 +524,7 @@ static int __devinit workqueue_cpu_callback(struct notifier_block *nfb,
list_for_each_entry(wq, &workqueues, list) {
/* Unbind so it can run. */
kthread_bind(per_cpu_ptr(wq->cpu_wq, hotcpu)->thread,
- smp_processor_id());
+ any_online_cpu(cpu_online_map));
cleanup_workqueue_thread(wq, hotcpu);
}
break;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-19 14:34:12 +0000