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authorIngo Molnar <mingo@elte.hu>2006-12-13 00:34:43 -0800
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-13 09:05:50 -0800
commit3117df0453828bd045c16244e6f50e5714667a8a (patch)
tree4f24e5b4024359dd42c91b84cbc25280f21b7314 /kernel/lockdep.c
parent27c3b23226fc649de47e4886ccbf994482f388ba (diff)
[PATCH] lockdep: print irq-trace info on asserts
When we print an assert due to scheduling-in-atomic bugs, and if lockdep is enabled, then the IRQ tracing information of lockdep can be printed to pinpoint the code location that disabled interrupts. This saved me quite a bit of debugging time in cases where the backtrace did not identify the irq-disabling site well enough. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel/lockdep.c')
-rw-r--r--kernel/lockdep.c6
1 files changed, 1 insertions, 5 deletions
diff --git a/kernel/lockdep.c b/kernel/lockdep.c
index 69e92c6b047..07a3d74a84b 100644
--- a/kernel/lockdep.c
+++ b/kernel/lockdep.c
@@ -1447,7 +1447,7 @@ check_usage_backwards(struct task_struct *curr, struct held_lock *this,
return print_irq_inversion_bug(curr, backwards_match, this, 0, irqclass);
}
-static inline void print_irqtrace_events(struct task_struct *curr)
+void print_irqtrace_events(struct task_struct *curr)
{
printk("irq event stamp: %u\n", curr->irq_events);
printk("hardirqs last enabled at (%u): ", curr->hardirq_enable_event);
@@ -1460,10 +1460,6 @@ static inline void print_irqtrace_events(struct task_struct *curr)
print_ip_sym(curr->softirq_disable_ip);
}
-#else
-static inline void print_irqtrace_events(struct task_struct *curr)
-{
-}
#endif
static int