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authorNeilBrown <neilb@suse.de>2011-02-21 10:25:57 +0300
committerNeilBrown <neilb@suse.de>2011-02-21 10:25:57 +0300
commitda9cf5050a2e3dbc3cf26a8d908482eb4485ed49 (patch)
treed5e7ea4ef419d07d294e88b47a4aaf2676a605eb /fs/internal.h
parent8f5f02c460b7ca74ce55ce126ce0c1e58a3f923d (diff)
downloadlinux-da9cf5050a2e3dbc3cf26a8d908482eb4485ed49.tar.xz
md: avoid spinlock problem in blk_throtl_exit
blk_throtl_exit assumes that ->queue_lock still exists, so make sure that it does. To do this, we stop redirecting ->queue_lock to conf->device_lock and leave it pointing where it is initialised - __queue_lock. As the blk_plug functions check the ->queue_lock is held, we now take that spin_lock explicitly around the plug functions. We don't need the locking, just the warning removal. This is needed for any kernel with the blk_throtl code, which is which is 2.6.37 and later. Cc: stable@kernel.org Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'fs/internal.h')
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