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| author | Wu Fengguang <fengguang.wu@intel.com> | 2008-11-25 09:08:39 +0100 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2008-12-29 08:28:43 +0100 |
| commit | 7c239517d9f18427fc2e7ed259fb3b866595f5af (patch) | |
| tree | cd2149cc2f2eb0faa83d38fe64e1228f7c703a85 /block/ioctl.c | |
| parent | 42364690992e592c05f85c76fda4055820b48c1b (diff) | |
| download | lwn-7c239517d9f18427fc2e7ed259fb3b866595f5af.tar.gz lwn-7c239517d9f18427fc2e7ed259fb3b866595f5af.zip | |
block: don't take lock on changing ra_pages
There's no need to take queue_lock or kernel_lock when modifying
bdi->ra_pages. So remove them. Also remove out of date comment for
queue_max_sectors_store().
Signed-off-by: Wu Fengguang <wfg@linux.intel.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block/ioctl.c')
| -rw-r--r-- | block/ioctl.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/block/ioctl.c b/block/ioctl.c index d03985b04d67..0f22e629b13c 100644 --- a/block/ioctl.c +++ b/block/ioctl.c @@ -323,9 +323,7 @@ int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd, bdi = blk_get_backing_dev_info(bdev); if (bdi == NULL) return -ENOTTY; - lock_kernel(); bdi->ra_pages = (arg * 512) / PAGE_CACHE_SIZE; - unlock_kernel(); return 0; case BLKBSZSET: /* set the logical block size */ |