[PATCH RFC 5/7] fs/xfs: support `DISABLE_FS_CSUM_VERIFICATION` config option

[Hrutvik Kanabar]

From: Hrutvik Kanabar <hrutvik@xxxxxxxxxx>

When `DISABLE_FS_CSUM_VERIFICATION` is enabled, return truthy value for
`xfs_verify_cksum`, which is the key function implementing checksum
verification for XFS.

Signed-off-by: Hrutvik Kanabar <hrutvik@xxxxxxxxxx>
---
 fs/xfs/libxfs/xfs_cksum.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/fs/xfs/libxfs/xfs_cksum.h b/fs/xfs/libxfs/xfs_cksum.h
index 999a290cfd72..ba55b1afa382 100644
--- a/fs/xfs/libxfs/xfs_cksum.h
+++ b/fs/xfs/libxfs/xfs_cksum.h
@@ -76,7 +76,10 @@ xfs_verify_cksum(char *buffer, size_t length, unsigned long cksum_offset)
 {
 	uint32_t crc = xfs_start_cksum_safe(buffer, length, cksum_offset);
 
-	return *(__le32 *)(buffer + cksum_offset) == xfs_end_cksum(crc);
+	if (IS_ENABLED(CONFIG_DISABLE_FS_CSUM_VERIFICATION))
+		return 1;
+	else
+		return *(__le32 *)(buffer + cksum_offset) == xfs_end_cksum(crc);
 }
 
 #endif /* _XFS_CKSUM_H */
-- 
2.38.0.413.g74048e4d9e-goog