[PATCH] zsmalloc: calling zs_map_object() from irq is a bug

[Sergey Senozhatsky]

Use BUG_ON(in_interrupt()) in zs_map_object(). Calling this
function from IRQ is a bug, because we use per-CPU mappings
and interrupt may corrupt those buffers.

Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@xxxxxxxxx>
---
 mm/zsmalloc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 7c38e850a8fc..685049a9048d 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -1349,7 +1349,7 @@ void *zs_map_object(struct zs_pool *pool, unsigned long handle,
 	 * pools/users, we can't allow mapping in interrupt context
 	 * because it can corrupt another users mappings.
 	 */
-	WARN_ON_ONCE(in_interrupt());
+	BUG_ON(in_interrupt());
 
 	/* From now on, migration cannot move the object */
 	pin_tag(handle);
-- 
2.14.1