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authorNeilBrown <neilb@suse.de>2010-06-01 19:37:29 +1000
committerNeilBrown <neilb@suse.de>2010-07-26 12:53:08 +1000
commit2ac8740151b082f045e58010eb92560c3a23a0e9 (patch)
tree39bff686e28f033339c6d1cf47042b6dc1586c2f /drivers/md/raid5.h
parent11d8a6e3719519fbc0e2c9d61b6fa931b84bf813 (diff)
downloadlinux-2ac8740151b082f045e58010eb92560c3a23a0e9.tar.bz2
md/raid5: add simple plugging infrastructure.
md/raid5 uses the plugging infrastructure provided by the block layer and 'struct request_queue'. However when we plug raid5 under dm there is no request queue so we cannot use that. So create a similar infrastructure that is much lighter weight and use it for raid5. Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md/raid5.h')
-rw-r--r--drivers/md/raid5.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/md/raid5.h b/drivers/md/raid5.h
index d6470dec667a..6acd458f239d 100644
--- a/drivers/md/raid5.h
+++ b/drivers/md/raid5.h
@@ -398,6 +398,9 @@ struct raid5_private_data {
* (fresh device added).
* Cleared when a sync completes.
*/
+
+ struct plug_handle plug;
+
/* per cpu variables */
struct raid5_percpu {
struct page *spare_page; /* Used when checking P/Q in raid6 */