diff options
| author | Jason Baron <[email protected]> | 2014-07-02 15:52:44 +0000 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2014-07-16 13:38:21 +0200 |
| commit | 5cd08fbfdb6baa9fe98f530b76898fc5725a6289 (patch) | |
| tree | b4f9df78a954c306cacea7372d920d1eb373140f /fs/jbd2/commit.c | |
| parent | 6e76ea8a8209386c3cc7ee5594e6ea5d25525cf2 (diff) | |
sched: Fix static_key race with sched_feat()
As pointed out by Andi Kleen, the usage of static keys can be racy in
sched_feat_disable() vs. sched_feat_enable(). Currently, we first check the
value of keys->enabled, and subsequently update the branch direction. This,
can be racy and can potentially leave the keys in an inconsistent state.
Take the i_mutex around these calls to resolve the race.
Reported-by: Andi Kleen <[email protected]>
Signed-off-by: Jason Baron <[email protected]>
Signed-off-by: Peter Zijlstra <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: [email protected]
Link: http://lkml.kernel.org/r/9d7780c83db26683955cd01e6bc654ee2586e67f.1404315388.git.jbaron@akamai.com
Signed-off-by: Ingo Molnar <[email protected]>
Diffstat (limited to 'fs/jbd2/commit.c')
0 files changed, 0 insertions, 0 deletions