[PATCH 15/45] xfs: mark the record passed into xchk_btree functions as const

["Darrick J. Wong" <djwong@xxxxxxxxxx>]

From: Darrick J. Wong <djwong@xxxxxxxxxx>

Source kernel commit: 22ece4e836beff1df528ee09cf21ca5fab7235f5

xchk_btree calls a user-supplied function to validate each btree record
that it finds.  Those functions are not supposed to change the record
data, so mark the parameter const.

Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
---
 include/xfs_arch.h      |   10 +++++-----
 libxfs/xfs_bmap_btree.c |    2 +-
 libxfs/xfs_bmap_btree.h |    3 ++-
 3 files changed, 8 insertions(+), 7 deletions(-)


diff --git a/include/xfs_arch.h b/include/xfs_arch.h
index 7f973249..d46ae470 100644
--- a/include/xfs_arch.h
+++ b/include/xfs_arch.h
@@ -232,19 +232,19 @@ static inline void be64_add_cpu(__be64 *a, __s64 b)
 	*a = cpu_to_be64(be64_to_cpu(*a) + b);
 }
 
-static inline uint16_t get_unaligned_be16(void *p)
+static inline uint16_t get_unaligned_be16(const void *p)
 {
-	uint8_t *__p = p;
+	const uint8_t *__p = p;
 	return __p[0] << 8 | __p[1];
 }
 
-static inline uint32_t get_unaligned_be32(void *p)
+static inline uint32_t get_unaligned_be32(const void *p)
 {
-	uint8_t *__p = p;
+	const uint8_t *__p = p;
         return (uint32_t)__p[0] << 24 | __p[1] << 16 | __p[2] << 8 | __p[3];
 }
 
-static inline uint64_t get_unaligned_be64(void *p)
+static inline uint64_t get_unaligned_be64(const void *p)
 {
 	return (uint64_t)get_unaligned_be32(p) << 32 |
 			   get_unaligned_be32(p + 4);
diff --git a/libxfs/xfs_bmap_btree.c b/libxfs/xfs_bmap_btree.c
index acaf2941..9e2e9926 100644
--- a/libxfs/xfs_bmap_btree.c
+++ b/libxfs/xfs_bmap_btree.c
@@ -56,7 +56,7 @@ xfs_bmdr_to_bmbt(
 
 void
 xfs_bmbt_disk_get_all(
-	struct xfs_bmbt_rec	*rec,
+	const struct xfs_bmbt_rec *rec,
 	struct xfs_bmbt_irec	*irec)
 {
 	uint64_t		l0 = get_unaligned_be64(&rec->l0);
diff --git a/libxfs/xfs_bmap_btree.h b/libxfs/xfs_bmap_btree.h
index 209ded1e..eda85512 100644
--- a/libxfs/xfs_bmap_btree.h
+++ b/libxfs/xfs_bmap_btree.h
@@ -90,7 +90,8 @@ extern void xfs_bmdr_to_bmbt(struct xfs_inode *, xfs_bmdr_block_t *, int,
 void xfs_bmbt_disk_set_all(struct xfs_bmbt_rec *r, struct xfs_bmbt_irec *s);
 extern xfs_filblks_t xfs_bmbt_disk_get_blockcount(const struct xfs_bmbt_rec *r);
 extern xfs_fileoff_t xfs_bmbt_disk_get_startoff(const struct xfs_bmbt_rec *r);
-extern void xfs_bmbt_disk_get_all(xfs_bmbt_rec_t *r, xfs_bmbt_irec_t *s);
+void xfs_bmbt_disk_get_all(const struct xfs_bmbt_rec *r,
+		struct xfs_bmbt_irec *s);
 
 extern void xfs_bmbt_to_bmdr(struct xfs_mount *, struct xfs_btree_block *, int,
 			xfs_bmdr_block_t *, int);