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| author | NeilBrown <neilb@suse.de> | 2014-12-15 12:56:58 +1100 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2015-02-06 09:32:55 +1100 |
| commit | 978a7a47cae79ae7a7b5a1e80bfcaef6ee700312 (patch) | |
| tree | f9f479f5a662ddc9cd482d0e46c7e21e3ca3783b /drivers/md/bitmap.c | |
| parent | 36d091f4759d194c99f0705d412afe208622b45a (diff) | |
| download | lwn-978a7a47cae79ae7a7b5a1e80bfcaef6ee700312.tar.gz lwn-978a7a47cae79ae7a7b5a1e80bfcaef6ee700312.zip | |
md/bitmap: protect clearing of ->bitmap by mddev->lock
This makes it safe to inspect the struct while holding only
the spinlock.
Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md/bitmap.c')
| -rw-r--r-- | drivers/md/bitmap.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c index 1695ee5f3ffc..3424b1915fc4 100644 --- a/drivers/md/bitmap.c +++ b/drivers/md/bitmap.c @@ -1619,7 +1619,9 @@ void bitmap_destroy(struct mddev *mddev) return; mutex_lock(&mddev->bitmap_info.mutex); + spin_lock(&mddev->lock); mddev->bitmap = NULL; /* disconnect from the md device */ + spin_unlock(&mddev->lock); mutex_unlock(&mddev->bitmap_info.mutex); if (mddev->thread) mddev->thread->timeout = MAX_SCHEDULE_TIMEOUT; |