From 6de43703108bb1d3fc9495b3e8107d6ec72f97e4 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Wed, 7 Jul 2010 16:51:27 +0200 Subject: [PATCH] block: remove BKL from BLKROSET and BLKFLSBUF We only call the functions set_device_ro(), invalidate_bdev(), sync_filesystem() and sync_blockdev() while holding the BKL in these commands. All of these are also done in other code paths without the BKL, which leads me to the conclusion that the BKL is not needed here either. The reason we hold it here is that it was originally pushed down into the ioctl function from vfs_ioctl. Signed-off-by: Arnd Bergmann Reviewed-by: Christoph Hellwig Signed-off-by: Jens Axboe --- block/ioctl.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/block/ioctl.c b/block/ioctl.c index 9d91e830b320..60f477c91eef 100644 --- a/block/ioctl.c +++ b/block/ioctl.c @@ -197,10 +197,8 @@ int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd, if (ret != -EINVAL && ret != -ENOTTY) return ret; - lock_kernel(); fsync_bdev(bdev); invalidate_bdev(bdev); - unlock_kernel(); return 0; case BLKROSET: @@ -212,9 +210,7 @@ int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd, return -EACCES; if (get_user(n, (int __user *)(arg))) return -EFAULT; - lock_kernel(); set_device_ro(bdev, n); - unlock_kernel(); return 0; case BLKDISCARD: {