linux-kernel - [PATCH v2 1/3] include/linux.h: use linux/magic.h to get XFS_SUPER

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Message-ID: <66f4220d2c2da6ce143114f9635ed8cd4e54af1d.1734611784.git.ojaswin@linux.ibm.com>
Date: Thu, 19 Dec 2024 18:09:13 +0530
From: Ojaswin Mujoo <ojaswin@...ux.ibm.com>
To: linux-ext4@...r.kernel.org, linux-xfs@...r.kernel.org
Cc: Ritesh Harjani <ritesh.list@...il.com>, linux-kernel@...r.kernel.org,
        linux-fsdevel@...r.kernel.org,
        Andrey Albershteyn <aalbersh@...nel.org>,
        "Darrick J . Wong" <djwong@...nel.org>, Christoph Hellwig <hch@....de>
Subject: [PATCH v2 1/3] include/linux.h: use linux/magic.h to get XFS_SUPER_MAGIC

This avoids open coding the magic number

Reviewed-by: Christoph Hellwig <hch@....de>
Signed-off-by: Ojaswin Mujoo <ojaswin@...ux.ibm.com>
---
 include/linux.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/linux.h b/include/linux.h
index e9eb7bfb26a1..b3516d54c51b 100644
--- a/include/linux.h
+++ b/include/linux.h
@@ -37,6 +37,7 @@
 #endif
 #include <unistd.h>
 #include <assert.h>
+#include <linux/magic.h> /* super block magic numbers */
 
 static __inline__ int xfsctl(const char *path, int fd, int cmd, void *p)
 {
@@ -60,7 +61,7 @@ static __inline__ int platform_test_xfs_fd(int fd)
 		return 0;
 	if (!S_ISREG(statbuf.st_mode) && !S_ISDIR(statbuf.st_mode))
 		return 0;
-	return (statfsbuf.f_type == 0x58465342);	/* XFSB */
+	return statfsbuf.f_type == XFS_SUPER_MAGIC;
 }
 
 static __inline__ int platform_test_xfs_path(const char *path)
-- 
2.43.5