Commit 5c015374 authored Apr 11, 2015 by Prasad Sodagudi

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



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>

parent 78e2a700

kernel/locking/spinlock_debug.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -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();
		}