Petr Uzel fd51469fb6 block: kill loop_mutex ... Following steps lead to deadlock in kernel: dd if=/dev/zero of=img bs=512 count=1000 losetup -f img mkfs.ext2 /dev/loop0 mount -t ext2 -o loop /dev/loop0 mnt umount mnt/ Stacktrace: [<c102ec04>] irq_exit+0x36/0x59 [<c101502c>] smp_apic_timer_interrupt+0x6b/0x75 [<c127f639>] apic_timer_interrupt+0x31/0x38 [<c101df88>] mutex_spin_on_owner+0x54/0x5b [<fe2250e9>] lo_release+0x12/0x67 [loop] [<c10c4eae>] __blkdev_put+0x7c/0x10c [<c10a4da5>] fput+0xd5/0x1aa [<fe2250cf>] loop_clr_fd+0x1a9/0x1b1 [loop] [<fe225110>] lo_release+0x39/0x67 [loop] [<c10c4eae>] __blkdev_put+0x7c/0x10c [<c10a59d9>] deactivate_locked_super+0x17/0x36 [<c10b6f37>] sys_umount+0x27e/0x2a5 [<c10b6f69>] sys_oldumount+0xb/0xe [<c1002897>] sysenter_do_call+0x12/0x26 [<ffffffff>] 0xffffffff Regression since 2a48fc0ab2, which introduced the private loop_mutex as part of the BKL removal process. As per [1], the mutex can be safely removed. [1] http://www.gossamer-threads.com/lists/linux/kernel/1341930 Addresses: https://bugzilla.novell.com/show_bug.cgi?id=669394 Addresses: https://bugzilla.kernel.org/show_bug.cgi?id=29172 Signed-off-by: Petr Uzel <petr.uzel@suse.cz> Cc: stable@kernel.org Reviewed-by: Nikanth Karthikesan <knikanth@suse.de> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>		2011-03-03 11:53:25 -05:00
..
aoe	drivers/block/aoe/Makefile: replace the use of <module>-objs with <module>-y	2011-01-19 08:25:02 -07:00
drbd	Merge branch 'for-2.6.38/core' of git://git.kernel.dk/linux-2.6-block	2011-01-13 10:45:01 -08:00
paride
amiflop.c
ataflop.c
brd.c
cciss_cmd.h	cciss: reinstate proper FIFO order of command queue list	2011-01-10 21:50:33 +01:00
cciss_scsi.c
cciss_scsi.h
cciss.c	cciss: make cciss_revalidate not loop through CISS_MAX_LUNS volumes unnecessarily.	2011-01-19 08:25:02 -07:00
cciss.h	Merge branch 'for-2.6.38/drivers' of git://git.kernel.dk/linux-2.6-block	2011-01-13 10:50:24 -08:00
cpqarray.c
cpqarray.h
cryptoloop.c
DAC960.c
DAC960.h
floppy.c	Fix over-zealous flush_disk when changing device size.	2011-02-24 17:25:47 +11:00
hd.c
ida_cmd.h
ida_ioctl.h
Kconfig	xen: separate out frontend xenbus	2011-01-05 16:29:17 -05:00
loop.c	block: kill loop_mutex	2011-03-03 11:53:25 -05:00
Makefile	drivers/block/Makefile: replace the use of <module>-objs with <module>-y	2011-01-19 08:25:02 -07:00
mg_disk.c
nbd.c	nbd: remove module-level ioctl mutex	2011-02-11 16:12:20 -08:00
osdblk.c
pktcdvd.c
ps3disk.c
ps3vram.c
rbd_types.h
rbd.c	rbd: fix cleanup when trying to mount inexistent image	2011-01-12 15:15:18 -08:00
smart1,2.h
sunvdc.c
swim3.c
swim_asm.S
swim.c
sx8.c
ub.c
umem.c
umem.h
viodasd.c
virtio_blk.c
xd.c
xd.h
xen-blkfront.c	Merge branch 'for-2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq	2011-01-07 16:58:04 -08:00
xsysace.c
z2ram.c