block: don't take lock on changing ra_pages
[linux-2.6.git] / block / compat_ioctl.c
index 67eb93c..f87615d 100644 (file)
@@ -774,9 +774,7 @@ long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
                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 BLKGETSIZE:
                size = bdev->bd_inode->i_size;