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Commit 4c6eb77c authored by Tingting Yang's avatar Tingting Yang Committed by Prasad Sodagudi
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msm: move printk out of spin lock low_water_lock 



cpu3 stuck in printk more time in spin lock low_water_lock cause cpu0
get spin lock fail and system crashed.

CRs-Fixed: 521570
Change-Id: I75356a4b4171ae2888ce6cce792f569b5ca8cdcf
Signed-off-by: default avatarTingting Yang <tingting@codeaurora.org>
Signed-off-by: default avatarPrasad Sodagudi <psodagud@codeaurora.org>
parent a1a6afd9

kernel/exit.c

+8 −2
Original line number Diff line number Diff line
@@ -650,6 +650,7 @@ static void check_stack_usage(void) 
	static DEFINE_SPINLOCK(low_water_lock);

	static int lowest_to_date = THREAD_SIZE;

	unsigned long free;

	int islower = false;



	free = stack_not_used(current);
@@ -658,11 +659,16 @@ static void check_stack_usage(void) 


	spin_lock(&low_water_lock);

	if (free < lowest_to_date) {

		pr_warn("%s (%d) used greatest stack depth: %lu bytes left\n",

			current->comm, task_pid_nr(current), free);

		lowest_to_date = free;

		islower = true;

	}

	spin_unlock(&low_water_lock);



	if (islower) {

		printk(KERN_WARNING "%s (%d) used greatest stack depth: "

				"%lu bytes left\n",

				current->comm, task_pid_nr(current), free);

	}

}

#else

static inline void check_stack_usage(void) {}