diff options
| -rw-r--r-- | fs/btrfs/ioctl.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 9ea0550..78d2048 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -368,9 +368,8 @@ static noinline int btrfs_ioctl_fitrim(struct file *file, void __user *arg) int btrfs_is_empty_uuid(u8 *uuid) { - static char empty_uuid[BTRFS_UUID_SIZE] = {0}; - - return !memcmp(uuid, empty_uuid, BTRFS_UUID_SIZE); + BUILD_BUG_ON(BTRFS_UUID_SIZE > PAGE_SIZE); + return !memcmp(uuid, empty_zero_page, BTRFS_UUID_SIZE); } static noinline int create_subvol(struct inode *dir, |