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Subject[PATCH mm] kasan: initialize read-write lock in stack ring
Date
From: Andrey Konovalov <andreyknvl@google.com>

Use __RW_LOCK_UNLOCKED to initialize stack_ring.lock.

Reported-by: Yu Zhao <yuzhao@google.com>
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>

---

Andrew, could you please fold this patch into:
"kasan: implement stack ring for tag-based modes".
---
mm/kasan/tags.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/mm/kasan/tags.c b/mm/kasan/tags.c
index 9d867cae1b7b..67a222586846 100644
--- a/mm/kasan/tags.c
+++ b/mm/kasan/tags.c
@@ -36,7 +36,9 @@ DEFINE_STATIC_KEY_TRUE(kasan_flag_stacktrace);
/* Non-zero, as initial pointer values are 0. */
#define STACK_RING_BUSY_PTR ((void *)1)

-struct kasan_stack_ring stack_ring;
+struct kasan_stack_ring stack_ring = {
+ .lock = __RW_LOCK_UNLOCKED(stack_ring.lock)
+};

/* kasan.stacktrace=off/on */
static int __init early_kasan_flag_stacktrace(char *arg)
--
2.25.1
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