libmount: define BTRFS_TEST_MAGIC if missing

* libmount/src/utils.c (BTRFS_TEST_MAGIC): Conditionally add define
which is used since commit v2.24-243-g6a52473.

Signed-off-by: Bernhard Voelker <mail@bernhard-voelker.de>

diff --git a/libmount/src/utils.c b/libmount/src/utils.c
index d402b7ef5dc1b91c1be919626104e84fba6cff98..2541a22bec76962d087cab8286117904429afcd0 100644 (file)
--- a/libmount/src/utils.c
+++ b/libmount/src/utils.c
@@ -333,6 +333,9 @@ int mnt_fstype_is_netfs(const char *type)
 #ifndef CONFIGFS_SUPER_MAGIC
 # define CONFIGFS_SUPER_MAGIC  0x62656570
 #endif
+#ifndef BTRFS_TEST_MAGIC
+# define BTRFS_TEST_MAGIC      0x73727279
+#endif
 
 const char *mnt_statfs_get_fstype(struct statfs *vfs)
 {