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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>		14 years ago
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aoe	drivers/block/aoe/Makefile: replace the use of <module>-objs with <module>-y	14 years ago
drbd	Merge branch 'for-2.6.38/core' of git://git.kernel.dk/linux-2.6-block	14 years ago
paride	Merge branch 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl	14 years ago
DAC960.c	Merge branch 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl	14 years ago
DAC960.h	…
Kconfig	xen: separate out frontend xenbus	14 years ago
Makefile	drivers/block/Makefile: replace the use of <module>-objs with <module>-y	14 years ago
amiflop.c	block: fix amiga and atari floppy driver compile warning	14 years ago
ataflop.c	block: fix amiga and atari floppy driver compile warning	14 years ago
brd.c	Merge branch 'for-2.6.37/barrier' of git://git.kernel.dk/linux-2.6-block	14 years ago
cciss.c	cciss: make cciss_revalidate not loop through CISS_MAX_LUNS volumes unnecessarily.	14 years ago
cciss.h	Merge branch 'for-2.6.38/drivers' of git://git.kernel.dk/linux-2.6-block	14 years ago
cciss_cmd.h	cciss: reinstate proper FIFO order of command queue list	14 years ago
cciss_scsi.c	SCSI host lock push-down	14 years ago
cciss_scsi.h	…
cpqarray.c	block: autoconvert trivial BKL users to private mutex	15 years ago
cpqarray.h	…
cryptoloop.c	…
floppy.c	Fix over-zealous flush_disk when changing device size.	14 years ago
hd.c	…
ida_cmd.h	…
ida_ioctl.h	…
loop.c	block: kill loop_mutex	14 years ago
mg_disk.c	…
nbd.c	nbd: remove module-level ioctl mutex	14 years ago
osdblk.c	block: remove spurious uses of REQ_HARDBARRIER	15 years ago
pktcdvd.c	block: make blkdev_get/put() handle exclusive access	14 years ago
ps3disk.c	Merge branch 'for-2.6.37/barrier' of git://git.kernel.dk/linux-2.6-block	14 years ago
ps3vram.c	…
rbd.c	rbd: fix cleanup when trying to mount inexistent image	14 years ago
rbd_types.h	rbd: introduce rados block device (rbd), based on libceph	14 years ago
smart1,2.h	…
sunvdc.c	…
swim.c	block: autoconvert trivial BKL users to private mutex	15 years ago
swim3.c	block: autoconvert trivial BKL users to private mutex	15 years ago
swim_asm.S	…
sx8.c	…
ub.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6	14 years ago
umem.c	…
umem.h	…
viodasd.c	block: autoconvert trivial BKL users to private mutex	15 years ago
virtio_blk.c	Merge branch 'for-2.6.37/barrier' of git://git.kernel.dk/linux-2.6-block	14 years ago
xd.c	block: autoconvert trivial BKL users to private mutex	15 years ago
xd.h	…
xen-blkfront.c	Merge branch 'for-2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq	14 years ago
xsysace.c	Merge branch 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6	14 years ago
z2ram.c	drivers/block/z2ram.c: correct printing of sector_t	14 years ago