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lib: spinlock: Trigger a watchdog bite on spin_dump for rwlock

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Currently dump_stack is printed once a spin_bug is detected for rwlock.
So provide an options to trigger a panic or watchdog bite for debugging
rwlock magic corruptions and lockups.

Change-Id: I20807e8eceb8b81635e58701d1f9f9bd36ab5877
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>
Signed-off-by: Venkata Narendra Kumar Gutta <vnkgutta@codeaurora.org>
This commit is contained in:
Prasad Sodagudi
2015-04-11 06:06:26 +05:30
committed by Venkata Narendra Kumar Gutta
parent 20e5cd9d82
commit 4fa2ab20f5
1 changed files with 5 additions and 0 deletions
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5
kernel/locking/spinlock_debug.c
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@@ -150,6 +150,11 @@ static void rwlock_bug(rwlock_t *lock, const char *msg)
printk(KERN_EMERG "BUG: rwlock %s on CPU#%d, %s/%d, %p\n",
msg, raw_smp_processor_id(), current->comm,
task_pid_nr(current), lock);
#ifdef CONFIG_DEBUG_SPINLOCK_BITE_ON_BUG
msm_trigger_wdog_bite();
#elif defined(CONFIG_DEBUG_SPINLOCK_PANIC_ON_BUG)
BUG();
#endif
dump_stack();
}