btrfs-progs: treat super.magic as an le64

The super block magic is a le64 whose value looks like an unterminated
string in memory.  The lack of null termination leads to clumsy use of
string functions and causes static analysis tools to warn that the
string will be unterminated.

So let's just treat it as the le64 that it is.  Endian wrappers are used
on the constant so that they're compiled into run-time constants.

Signed-off-by: Zach Brown <zab@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/ctree.h b/ctree.h
index d0f6062f..18b68e1b 100644
--- a/ctree.h
+++ b/ctree.h
@@ -28,7 +28,7 @@
 
 struct btrfs_root;
 struct btrfs_trans_handle;
-#define BTRFS_MAGIC "_BHRfS_M"
+#define BTRFS_MAGIC 0x4D5F53665248425F /* ascii _BHRfS_M, no null */
 
 #define BTRFS_MAX_LEVEL 8