Ian Kent 7cbdb4a286 autofs: use dentry flags to block walks during expire ... Somewhere along the way the autofs expire operation has changed to hold a spin lock over expired dentry selection. The autofs indirect mount expired dentry selection is complicated and quite lengthy so it isn't appropriate to hold a spin lock over the operation. Commit 47be61845c ("fs/dcache.c: avoid soft-lockup in dput()") added a might_sleep() to dput() causing a WARN_ONCE() about this usage to be issued. But the spin lock doesn't need to be held over this check, the autofs dentry info. flags are enough to block walks into dentrys during the expire. I've left the direct mount expire as it is (for now) because it is much simpler and quicker than the indirect mount expire and adding spin lock release and re-aquires would do nothing more than add overhead. Fixes: 47be61845c ("fs/dcache.c: avoid soft-lockup in dput()") Link: http://lkml.kernel.org/r/20160912014017.1773.73060.stgit@pluto.themaw.net Signed-off-by: Ian Kent <raven@themaw.net> Reported-by: Takashi Iwai <tiwai@suse.de> Tested-by: Takashi Iwai <tiwai@suse.de> Cc: Takashi Iwai <tiwai@suse.de> Cc: NeilBrown <neilb@suse.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2016-09-19 15:36:17 -07:00
..
Kconfig	fs/Kconfig: move autofs, autofs4 out	2009-01-22 13:15:54 +03:00
Makefile	autofs4: add miscellaneous device for ioctls	2008-10-16 11:21:39 -07:00
autofs_i.h	autofs races	2016-06-12 11:24:46 -04:00
dev-ioctl.c	autofs4: use pr_xxx() macros directly for logging	2016-03-15 16:55:16 -07:00
expire.c	autofs: use dentry flags to block walks during expire	2016-09-19 15:36:17 -07:00
init.c	autofs4: coding style fixes	2016-03-15 16:55:16 -07:00
inode.c	autofs4: use pr_xxx() macros directly for logging	2016-03-15 16:55:16 -07:00
root.c	qstr: constify instances in autofs4	2016-07-20 23:30:06 -04:00
symlink.c	autofs4: coding style fixes	2016-03-15 16:55:16 -07:00
waitq.c	Merge branch 'work.const-qstr' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2016-08-06 09:49:02 -04:00