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lockdep: Fix trace_[soft,hard]irqs_[on,off]() recursion 

Commit:

  1efc5da3cf56: [PATCH] order of lockdep off/on in vprintk() should be changed

explains the reason for having raw_local_irq_*() and lockdep_off()
in printk(). Instead of working around the broken recursion detection
of interrupt state tracking, fix it.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: efault@gmx.de
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/20110621153806.185242734@chello.nl
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra 2011-06-21 17:17:27 +02:00 committed by Ingo Molnar
parent 4f2a8d3cf5
commit dd4e5d3ac4
1 changed files with 20 additions and 10 deletions
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30
kernel/lockdep.c
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@ -2478,15 +2478,10 @@ mark_held_locks(struct task_struct *curr, enum mark_type mark)
/*
* Hardirqs will be enabled:
*/
void trace_hardirqs_on_caller(unsigned long ip)
static void __trace_hardirqs_on_caller(unsigned long ip)
{
struct task_struct *curr = current;
time_hardirqs_on(CALLER_ADDR0, ip);
if (unlikely(!debug_locks || current->lockdep_recursion))
return;
if (DEBUG_LOCKS_WARN_ON(unlikely(early_boot_irqs_disabled)))
return;
@ -2502,8 +2497,6 @@ void trace_hardirqs_on_caller(unsigned long ip)
/* we'll do an OFF -> ON transition: */
curr->hardirqs_enabled = 1;
if (DEBUG_LOCKS_WARN_ON(!irqs_disabled()))
return;
if (DEBUG_LOCKS_WARN_ON(current->hardirq_context))
return;
/*
@ -2525,6 +2518,21 @@ void trace_hardirqs_on_caller(unsigned long ip)
curr->hardirq_enable_event = ++curr->irq_events;
debug_atomic_inc(hardirqs_on_events);
}
void trace_hardirqs_on_caller(unsigned long ip)
{
time_hardirqs_on(CALLER_ADDR0, ip);
if (unlikely(!debug_locks || current->lockdep_recursion))
return;
if (DEBUG_LOCKS_WARN_ON(!irqs_disabled()))
return;
current->lockdep_recursion = 1;
__trace_hardirqs_on_caller(ip);
current->lockdep_recursion = 0;
}
EXPORT_SYMBOL(trace_hardirqs_on_caller);
void trace_hardirqs_on(void)
@ -2574,7 +2582,7 @@ void trace_softirqs_on(unsigned long ip)
{
struct task_struct *curr = current;
if (unlikely(!debug_locks))
if (unlikely(!debug_locks || current->lockdep_recursion))
return;
if (DEBUG_LOCKS_WARN_ON(!irqs_disabled()))
@ -2585,6 +2593,7 @@ void trace_softirqs_on(unsigned long ip)
return;
}
current->lockdep_recursion = 1;
/*
* We'll do an OFF -> ON transition:
*/
@ -2599,6 +2608,7 @@ void trace_softirqs_on(unsigned long ip)
*/
if (curr->hardirqs_enabled)
mark_held_locks(curr, SOFTIRQ);
current->lockdep_recursion = 0;
}
/*
@ -2608,7 +2618,7 @@ void trace_softirqs_off(unsigned long ip)
{
struct task_struct *curr = current;
if (unlikely(!debug_locks))
if (unlikely(!debug_locks || current->lockdep_recursion))
return;
if (DEBUG_LOCKS_WARN_ON(!irqs_disabled()))