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: 969097
Change-Id: I75356a4b4171ae2888ce6cce792f569b5ca8cdcf
Signed-off-by: Tingting Yang <tingting@codeaurora.org>
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>
Signed-off-by: Minming Qi <mqi@codeaurora.org>
diff --git a/kernel/exit.c b/kernel/exit.c
index 2c18194..ee8c601 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -717,6 +717,7 @@
static DEFINE_SPINLOCK(low_water_lock);
static int lowest_to_date = THREAD_SIZE;
unsigned long free;
+ int islower = false;
free = stack_not_used(current);
@@ -725,11 +726,15 @@
spin_lock(&low_water_lock);
if (free < lowest_to_date) {
- pr_info("%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) {
+ pr_info("%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) {}