btrfs: Use __u64 in exported linux/btrfs.h.

This patch fixes this build error.

/usr/include/linux/btrfs.h:121:3: error: unknown type name ‘u64’
   u64 devid;
   ^~~

Fixes: 6b526ed70cf1 ("btrfs: introduce device delete by devid")
Signed-off-by: Vinson Lee <vlee@freedesktop.org>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/include/uapi/linux/btrfs.h b/include/uapi/linux/btrfs.h
index 23c6960..2bdd1e3 100644 (file)
--- a/include/uapi/linux/btrfs.h
+++ b/include/uapi/linux/btrfs.h
@@ -118,7 +118,7 @@ struct btrfs_ioctl_vol_args_v2 {
        };
        union {
                char name[BTRFS_SUBVOL_NAME_MAX + 1];
-               u64 devid;
+               __u64 devid;
        };
 };