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| author | Bart Van Assche <bart.vanassche@sandisk.com> | 2017-04-27 10:11:21 -0700 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2017-04-27 17:08:42 -0400 |
| commit | 1ea0654e46eb62acc379000be2f16350101ebf85 (patch) | |
| tree | 52dceb575d77441dbbd2a5a2ec9f56f54304a2bc /drivers/md/dm.c | |
| parent | 73cbca6a637eb88738ea5a5cd6a611bbbca8ac19 (diff) | |
| download | linux-stable-1ea0654e46eb62acc379000be2f16350101ebf85.tar.gz linux-stable-1ea0654e46eb62acc379000be2f16350101ebf85.tar.bz2 linux-stable-1ea0654e46eb62acc379000be2f16350101ebf85.zip | |
dm: verify suspend_locking assumptions at runtime
Ensure that the assumptions about the caller holding suspend_lock
are checked at runtime if lockdep is enabled.
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm.c')
| -rw-r--r-- | drivers/md/dm.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c index e602ae0d5d75..9940c9a42665 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -1698,6 +1698,8 @@ static void event_callback(void *context) */ static void __set_size(struct mapped_device *md, sector_t size) { + lockdep_assert_held(&md->suspend_lock); + set_capacity(md->disk, size); i_size_write(md->bdev->bd_inode, (loff_t)size << SECTOR_SHIFT); @@ -2147,8 +2149,6 @@ static void unlock_fs(struct mapped_device *md) * If __dm_suspend returns 0, the device is completely quiescent * now. There is no request-processing activity. All new requests * are being added to md->deferred list. - * - * Caller must hold md->suspend_lock */ static int __dm_suspend(struct mapped_device *md, struct dm_table *map, unsigned suspend_flags, long task_state, @@ -2364,6 +2364,8 @@ static void __dm_internal_suspend(struct mapped_device *md, unsigned suspend_fla { struct dm_table *map = NULL; + lockdep_assert_held(&md->suspend_lock); + if (md->internal_suspend_count++) return; /* nested internal suspend */ |