]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
md/raid5: Remove use of sh->lock in sync_request
authorNeilBrown <neilb@suse.de>
Tue, 26 Jul 2011 01:19:49 +0000 (11:19 +1000)
committerNeilBrown <neilb@suse.de>
Tue, 26 Jul 2011 01:19:49 +0000 (11:19 +1000)
commit83206d66b65118d995c38746f21edc2bb8564b49
tree69e1c082cb33d19a508c764da613e0c6b5ced27b
parentffd96e35c16a99fdb490cc5723b8e32135ae5883
md/raid5: Remove use of sh->lock in sync_request

This is the start of a series of patches to remove sh->lock.

sync_request takes sh->lock before setting STRIPE_SYNCING to ensure
there is no race with testing it in handle_stripe[56].

Instead, use a new flag STRIPE_SYNC_REQUESTED and test it early
in handle_stripe[56] (after getting the same lock) and perform the
same set/clear operations if it was set.

Signed-off-by: NeilBrown <neilb@suse.de>
Reviewed-by: Namhyung Kim <namhyung@gmail.com>
drivers/md/raid5.c
drivers/md/raid5.h