projects
/
GitHub
/
mt8127
/
android_kernel_alcatel_ttab.git
/ blobdiff
commit
grep
author
committer
pickaxe
?
search:
re
summary
|
shortlog
|
log
|
commit
|
commitdiff
|
tree
raw
| inline |
side by side
elevator: Fix a race in elevator switching and md device initialization
[GitHub/mt8127/android_kernel_alcatel_ttab.git]
/
block
/
elevator.c
diff --git
a/block/elevator.c
b/block/elevator.c
index 668394d185885bc3fcc878697878a4cb07be899e..02d4390afeebde962cd328c9a6a64fe37b3c91fd 100644
(file)
--- a/
block/elevator.c
+++ b/
block/elevator.c
@@
-186,6
+186,12
@@
int elevator_init(struct request_queue *q, char *name)
struct elevator_type *e = NULL;
int err;
+ /*
+ * q->sysfs_lock must be held to provide mutual exclusion between
+ * elevator_switch() and here.
+ */
+ lockdep_assert_held(&q->sysfs_lock);
+
if (unlikely(q->elevator))
return 0;