From: Al Viro Date: Wed, 6 May 2009 02:10:44 +0000 (-0400) Subject: No need to do lock_super() for exclusion in generic_shutdown_super() X-Git-Tag: v2.6.31-rc1~375^2~47 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a9e220f8322e2b0e0b8903fe00265461cffad3f0;p=pandora-kernel.git No need to do lock_super() for exclusion in generic_shutdown_super() We can't run into contention on it. All other callers of lock_super() either hold s_umount (and we have it exclusive) or hold an active reference to superblock in question, which prevents the call of generic_shutdown_super() while the reference is held. So we can replace lock_super(s) with get_fs_excl() in generic_shutdown_super() (and corresponding change for unlock_super(), of course). Since ext4 expects s_lock held for its put_super, take lock_super() into it. The rest of filesystems do not care at all. Signed-off-by: Al Viro --- Reading git-diff-tree failed