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| author | Ingo Molnar <mingo@elte.hu> | 2006-12-13 00:34:43 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.osdl.org> | 2006-12-13 09:05:50 -0800 |
| commit | 3117df0453828bd045c16244e6f50e5714667a8a (patch) | |
| tree | 4f24e5b4024359dd42c91b84cbc25280f21b7314 /kernel/lockdep.c | |
| parent | 27c3b23226fc649de47e4886ccbf994482f388ba (diff) | |
| download | lwn-3117df0453828bd045c16244e6f50e5714667a8a.tar.gz lwn-3117df0453828bd045c16244e6f50e5714667a8a.zip | |
[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.c | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/kernel/lockdep.c b/kernel/lockdep.c index 69e92c6b0472..07a3d74a84be 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 |