linux/arch
Arnd Bergmann 6e9624b8ca block: push down BKL into .open and .release
The open and release block_device_operations are currently
called with the BKL held. In order to change that, we must
first make sure that all drivers that currently rely
on this have no regressions.

This blindly pushes the BKL into all .open and .release
operations for all block drivers to prepare for the
next step. The drivers can subsequently replace the BKL
with their own locks or remove it completely when it can
be shown that it is not needed.

The functions blkdev_get and blkdev_put are the only
remaining users of the big kernel lock in the block
layer, besides a few uses in the ioctl code, none
of which need to serialize with blkdev_{get,put}.

Most of these two functions is also under the protection
of bdev->bd_mutex, including the actual calls to
->open and ->release, and the common code does not
access any global data structures that need the BKL.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2010-08-07 18:25:34 +02:00
..
alpha remove needless ISA_DMA_THRESHOLD 2010-08-07 18:15:50 +02:00
arm Merge master.kernel.org:/home/rmk/linux-2.6-arm 2010-07-30 19:02:51 -07:00
avr32 remove needless ISA_DMA_THRESHOLD 2010-08-07 18:15:50 +02:00
blackfin remove needless ISA_DMA_THRESHOLD 2010-08-07 18:15:50 +02:00
cris remove needless ISA_DMA_THRESHOLD 2010-08-07 18:15:50 +02:00
frv remove needless ISA_DMA_THRESHOLD 2010-08-07 18:15:50 +02:00
h8300 remove needless ISA_DMA_THRESHOLD 2010-08-07 18:15:50 +02:00
ia64 remove needless ISA_DMA_THRESHOLD 2010-08-07 18:15:50 +02:00
m32r remove needless ISA_DMA_THRESHOLD 2010-08-07 18:15:50 +02:00
m68k remove needless ISA_DMA_THRESHOLD 2010-08-07 18:15:50 +02:00
m68knommu Merge branch 'for-35' of git://repo.or.cz/linux-kbuild 2010-06-01 08:55:52 -07:00
microblaze remove needless ISA_DMA_THRESHOLD 2010-08-07 18:15:50 +02:00
mips remove needless ISA_DMA_THRESHOLD 2010-08-07 18:15:50 +02:00
mn10300 remove needless ISA_DMA_THRESHOLD 2010-08-07 18:15:50 +02:00
parisc remove needless ISA_DMA_THRESHOLD 2010-08-07 18:15:50 +02:00
powerpc remove needless ISA_DMA_THRESHOLD 2010-08-07 18:15:50 +02:00
s390 remove needless ISA_DMA_THRESHOLD 2010-08-07 18:15:50 +02:00
score remove needless ISA_DMA_THRESHOLD 2010-08-07 18:15:50 +02:00
sh remove needless ISA_DMA_THRESHOLD 2010-08-07 18:15:50 +02:00
sparc remove needless ISA_DMA_THRESHOLD 2010-08-07 18:15:50 +02:00
um block: push down BKL into .open and .release 2010-08-07 18:25:34 +02:00
x86 remove needless ISA_DMA_THRESHOLD 2010-08-07 18:15:50 +02:00
xtensa remove needless ISA_DMA_THRESHOLD 2010-08-07 18:15:50 +02:00
.gitignore
Kconfig