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Merge branch 'v2.6.24-rc1-lockdep' of git://git.kernel.org/pub/scm/linux/kernel/git/peterz/linux-2.6-lockdep

Browse Source 
* 'v2.6.24-rc1-lockdep' of git://git.kernel.org/pub/scm/linux/kernel/git/peterz/linux-2.6-lockdep:
  lockdep: fix a typo in the __lock_acquire comment
  sched: fix unconditional irq lock
  lockdep: fixup irq tracing
This commit is contained in:
Linus Torvalds 2007-11-03 12:42:52 -07:00
commit a7e1e001f4
10 changed files with 61 additions and 15 deletions
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7
arch/x86/kernel/kprobes_32.c
View File

@ -564,12 +564,7 @@ static int __kprobes post_kprobe_handler(struct pt_regs *regs)
resume_execution(cur, regs, kcb);
regs->eflags |= kcb->kprobe_saved_eflags;
#ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT
if (raw_irqs_disabled_flags(regs->eflags))
trace_hardirqs_off();
else
trace_hardirqs_on();
#endif
trace_hardirqs_fixup_flags(regs->eflags);
/*Restore back the original saved kprobes variables and continue. */
if (kcb->kprobe_status == KPROBE_REENTER) {

7
arch/x86/kernel/kprobes_64.c
View File

@ -551,12 +551,7 @@ int __kprobes post_kprobe_handler(struct pt_regs *regs)
resume_execution(cur, regs, kcb);
regs->eflags |= kcb->kprobe_saved_rflags;
#ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT
if (raw_irqs_disabled_flags(regs->eflags))
trace_hardirqs_off();
else
trace_hardirqs_on();
#endif
trace_hardirqs_fixup_flags(regs->eflags);
/* Restore the original saved kprobes variables and continue. */
if (kcb->kprobe_status == KPROBE_REENTER) {

2
arch/x86/kernel/traps_32.c
View File

@ -789,6 +789,8 @@ void restart_nmi(void)
#ifdef CONFIG_KPROBES
fastcall void __kprobes do_int3(struct pt_regs *regs, long error_code)
{
trace_hardirqs_fixup();
if (notify_die(DIE_INT3, "int3", regs, error_code, 3, SIGTRAP)
== NOTIFY_STOP)
return;

2
arch/x86/kernel/traps_64.c
View File

@ -807,6 +807,8 @@ asmlinkage __kprobes void default_do_nmi(struct pt_regs *regs)
/* runs on IST stack. */
asmlinkage void __kprobes do_int3(struct pt_regs * regs, long error_code)
{
trace_hardirqs_fixup();
if (notify_die(DIE_INT3, "int3", regs, error_code, 3, SIGTRAP) == NOTIFY_STOP) {
return;
}

5
arch/x86/mm/fault_32.c
View File

@ -303,6 +303,11 @@ fastcall void __kprobes do_page_fault(struct pt_regs *regs,
int write, si_code;
int fault;
/*
* We can fault from pretty much anywhere, with unknown IRQ state.
*/
trace_hardirqs_fixup();
/* get the address */
address = read_cr2();

5
arch/x86/mm/fault_64.c
View File

@ -304,6 +304,11 @@ asmlinkage void __kprobes do_page_fault(struct pt_regs *regs,
unsigned long flags;
siginfo_t info;
/*
* We can fault from pretty much anywhere, with unknown IRQ state.
*/
trace_hardirqs_fixup();
tsk = current;
mm = tsk->mm;
prefetchw(&mm->mmap_sem);

21
include/asm-x86/irqflags_32.h
View File

@ -129,6 +129,27 @@ static inline int raw_irqs_disabled(void)
return raw_irqs_disabled_flags(flags);
}
/*
* makes the traced hardirq state match with the machine state
*
* should be a rarely used function, only in places where its
* otherwise impossible to know the irq state, like in traps.
*/
static inline void trace_hardirqs_fixup_flags(unsigned long flags)
{
if (raw_irqs_disabled_flags(flags))
trace_hardirqs_off();
else
trace_hardirqs_on();
}
static inline void trace_hardirqs_fixup(void)
{
unsigned long flags = __raw_local_save_flags();
trace_hardirqs_fixup_flags(flags);
}
#endif /* __ASSEMBLY__ */
/*

20
include/asm-x86/irqflags_64.h
View File

@ -111,6 +111,26 @@ static inline int raw_irqs_disabled(void)
return raw_irqs_disabled_flags(flags);
}
/*
* makes the traced hardirq state match with the machine state
*
* should be a rarely used function, only in places where its
* otherwise impossible to know the irq state, like in traps.
*/
static inline void trace_hardirqs_fixup_flags(unsigned long flags)
{
if (raw_irqs_disabled_flags(flags))
trace_hardirqs_off();
else
trace_hardirqs_on();
}
static inline void trace_hardirqs_fixup(void)
{
unsigned long flags = __raw_local_save_flags();
trace_hardirqs_fixup_flags(flags);
}
/*
* Used in the idle loop; sti takes one instruction cycle
* to complete:

2
kernel/lockdep.c
View File

@ -2424,7 +2424,7 @@ static int __lock_acquire(struct lockdep_map *lock, unsigned int subclass,
return 0;
/*
* Calculate the chain hash: it's the combined has of all the
* Calculate the chain hash: it's the combined hash of all the
* lock keys along the dependency chain. We save the hash value
* at every step so that we can get the current hash easily
* after unlock. The chain hash is then used to cache dependency

5
kernel/sched_debug.c
View File

@ -80,6 +80,7 @@ print_task(struct seq_file *m, struct rq *rq, struct task_struct *p)
static void print_rq(struct seq_file *m, struct rq *rq, int rq_cpu)
{
struct task_struct *g, *p;
unsigned long flags;
SEQ_printf(m,
"\nrunnable tasks:\n"
@ -88,7 +89,7 @@ static void print_rq(struct seq_file *m, struct rq *rq, int rq_cpu)
"------------------------------------------------------"
"----------------------------------------------------\n");
read_lock_irq(&tasklist_lock);
read_lock_irqsave(&tasklist_lock, flags);
do_each_thread(g, p) {
if (!p->se.on_rq || task_cpu(p) != rq_cpu)
@ -97,7 +98,7 @@ static void print_rq(struct seq_file *m, struct rq *rq, int rq_cpu)
print_task(m, rq, p);
} while_each_thread(g, p);
read_unlock_irq(&tasklist_lock);
read_unlock_irqrestore(&tasklist_lock, flags);
}
void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)