tree be13a8b673d117ec3d186f2911f4ebae3da857dd
parent 804f1594cc3deb161e531a43d90c501f0db2635a
author Jan Kara <jack@suse.cz> 1143111617 -0800
committer Linus Torvalds <torvalds@g5.osdl.org> 1143128290 -0800

[PATCH] Fix oops in invalidate_dquots()

When quota is being turned off we assumed that all the references to dquots
were already dropped.  That need not be true as inodes being deleted are
not on superblock's inodes list and hence we need not reach it when
removing quota references from inodes.  So invalidate_dquots() has to wait
for all the users of dquots (as quota is already marked as turned off, no
new references can be acquired and so this is bound to happen rather
early).  When we do this, we can also remove the iprune_sem locking as it
was protecting us against exactly the same problem when freeing inodes
icache memory.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>