[PATCH] get rid of struct file use in blkdev_ioctl() BLKBSZSET

We need to do bd_claim() only if file hadn't been opened with O_EXCL
and then we have no need to use file itself as owner.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/block/ioctl.c b/block/ioctl.c
index bd214cb..14b7f2c 100644 (file)
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -343,10 +343,11 @@ int blkdev_ioctl(struct inode *inode, struct file *file, unsigned cmd,
                        return -EINVAL;
                if (get_user(n, (int __user *) arg))
                        return -EFAULT;
-               if (bd_claim(bdev, file) < 0)
+               if (!(mode & FMODE_EXCL) && bd_claim(bdev, &bdev) < 0)
                        return -EBUSY;
                ret = set_blocksize(bdev, n);
-               bd_release(bdev);
+               if (!(mode & FMODE_EXCL))
+                       bd_release(bdev);
                return ret;
        case BLKPG:
                lock_kernel();