[PATCH 3/6] mm/kasan, slub: don't disable interrupts when object leaves quarantine

Andrey Ryabinin
2016-08-02T18:45:36Z

SLUB doesn't require disabled interrupts to call ___cache_free().

Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
---
mm/kasan/quarantine.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/mm/kasan/quarantine.c b/mm/kasan/quarantine.c
index 65793f1..4852625 100644
--- a/mm/kasan/quarantine.c
+++ b/mm/kasan/quarantine.c
@@ -147,10 +147,14 @@ static void qlink_free(struct qlist_node *qlink, struct kmem_cache *cache)
struct kasan_alloc_meta *alloc_info = get_alloc_info(cache, object);
unsigned long flags;

- local_irq_save(flags);
+ if (IS_ENABLED(CONFIG_SLAB))
+ local_irq_save(flags);
+
alloc_info->state = KASAN_STATE_FREE;
___cache_free(cache, object, _THIS_IP_);
- local_irq_restore(flags);
+
+ if (IS_ENABLED(CONFIG_SLAB))
+ local_irq_restore(flags);
}

static void qlist_free_all(struct qlist_head *q, struct kmem_cache *cache)
--
2.7.3