diff options
Diffstat (limited to 'fs/block_dev.c')
| -rw-r--r-- | fs/block_dev.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c index 02ae171c4..9a034ca60 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -11,6 +11,7 @@ #include <linux/malloc.h> #include <linux/kmod.h> #include <linux/devfs_fs_kernel.h> +#include <linux/smp_lock.h> #include <asm/uaccess.h> @@ -611,6 +612,7 @@ int blkdev_open(struct inode * inode, struct file * filp) int ret = -ENODEV; struct block_device *bdev = inode->i_bdev; down(&bdev->bd_sem); + lock_kernel(); if (!bdev->bd_op) bdev->bd_op = get_blkfops(MAJOR(inode->i_rdev)); if (bdev->bd_op) { @@ -622,6 +624,7 @@ int blkdev_open(struct inode * inode, struct file * filp) else if (!atomic_read(&bdev->bd_openers)) bdev->bd_op = NULL; } + unlock_kernel(); up(&bdev->bd_sem); return ret; } |