xfs: mark the record passed into btree init_key functions as const

These functions initialize a key from a record, but they aren't supposed
to modify the record.  Mark it const.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>

fs/xfs/libxfs/xfs_alloc_btree.c

@@ -178,7 +178,7 @@ xfs_allocbt_get_maxrecs(
 STATIC void
 xfs_allocbt_init_key_from_rec(
 	union xfs_btree_key		*key,
-	union xfs_btree_rec	*rec)
+	const union xfs_btree_rec	*rec)
 {
 	key->alloc.ar_startblock = rec->alloc.ar_startblock;
 	key->alloc.ar_blockcount = rec->alloc.ar_blockcount;
@@ -187,7 +187,7 @@ xfs_allocbt_init_key_from_rec(
 STATIC void
 xfs_bnobt_init_high_key_from_rec(
 	union xfs_btree_key		*key,
-	union xfs_btree_rec	*rec)
+	const union xfs_btree_rec	*rec)
 {
 	__u32				x;
 
@@ -200,7 +200,7 @@ xfs_bnobt_init_high_key_from_rec(
 STATIC void
 xfs_cntbt_init_high_key_from_rec(
 	union xfs_btree_key		*key,
-	union xfs_btree_rec	*rec)
+	const union xfs_btree_rec	*rec)
 {
 	key->alloc.ar_blockcount = rec->alloc.ar_blockcount;
 	key->alloc.ar_startblock = 0;

fs/xfs/libxfs/xfs_bmap_btree.c

@@ -78,7 +78,7 @@ xfs_bmbt_disk_get_all(
  */
 xfs_filblks_t
 xfs_bmbt_disk_get_blockcount(
-	xfs_bmbt_rec_t	*r)
+	const struct xfs_bmbt_rec	*r)
 {
 	return (xfs_filblks_t)(be64_to_cpu(r->l1) & xfs_mask64lo(21));
 }
@@ -88,7 +88,7 @@ xfs_bmbt_disk_get_blockcount(
  */
 xfs_fileoff_t
 xfs_bmbt_disk_get_startoff(
-	xfs_bmbt_rec_t	*r)
+	const struct xfs_bmbt_rec	*r)
 {
 	return ((xfs_fileoff_t)be64_to_cpu(r->l0) &
 		 xfs_mask64lo(64 - BMBT_EXNTFLAG_BITLEN)) >> 9;
@@ -353,7 +353,7 @@ xfs_bmbt_get_dmaxrecs(
 STATIC void
 xfs_bmbt_init_key_from_rec(
 	union xfs_btree_key		*key,
-	union xfs_btree_rec	*rec)
+	const union xfs_btree_rec	*rec)
 {
 	key->bmbt.br_startoff =
 		cpu_to_be64(xfs_bmbt_disk_get_startoff(&rec->bmbt));
@@ -362,7 +362,7 @@ xfs_bmbt_init_key_from_rec(
 STATIC void
 xfs_bmbt_init_high_key_from_rec(
 	union xfs_btree_key		*key,
-	union xfs_btree_rec	*rec)
+	const union xfs_btree_rec	*rec)
 {
 	key->bmbt.br_startoff = cpu_to_be64(
 			xfs_bmbt_disk_get_startoff(&rec->bmbt) +

fs/xfs/libxfs/xfs_bmap_btree.h

@@ -88,8 +88,8 @@ extern void xfs_bmdr_to_bmbt(struct xfs_inode *, xfs_bmdr_block_t *, int,
 			struct xfs_btree_block *, 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(xfs_bmbt_rec_t *r);
-extern xfs_fileoff_t xfs_bmbt_disk_get_startoff(xfs_bmbt_rec_t *r);
+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);
 
 extern void xfs_bmbt_to_bmdr(struct xfs_mount *, struct xfs_btree_block *, int,

fs/xfs/libxfs/xfs_btree.h

@@ -130,13 +130,13 @@ struct xfs_btree_ops {
 
 	/* init values of btree structures */
 	void	(*init_key_from_rec)(union xfs_btree_key *key,
-				     union xfs_btree_rec *rec);
+				     const union xfs_btree_rec *rec);
 	void	(*init_rec_from_cur)(struct xfs_btree_cur *cur,
 				     union xfs_btree_rec *rec);
 	void	(*init_ptr_from_cur)(struct xfs_btree_cur *cur,
 				     union xfs_btree_ptr *ptr);
 	void	(*init_high_key_from_rec)(union xfs_btree_key *key,
-					  union xfs_btree_rec *rec);
+					  const union xfs_btree_rec *rec);
 
 	/* difference between key value and cursor value */
 	int64_t (*key_diff)(struct xfs_btree_cur *cur,

fs/xfs/libxfs/xfs_ialloc_btree.c

@@ -189,7 +189,7 @@ xfs_inobt_get_maxrecs(
 STATIC void
 xfs_inobt_init_key_from_rec(
 	union xfs_btree_key		*key,
-	union xfs_btree_rec	*rec)
+	const union xfs_btree_rec	*rec)
 {
 	key->inobt.ir_startino = rec->inobt.ir_startino;
 }
@@ -197,7 +197,7 @@ xfs_inobt_init_key_from_rec(
 STATIC void
 xfs_inobt_init_high_key_from_rec(
 	union xfs_btree_key		*key,
-	union xfs_btree_rec	*rec)
+	const union xfs_btree_rec	*rec)
 {
 	__u32				x;
 

fs/xfs/libxfs/xfs_refcount_btree.c

@@ -136,7 +136,7 @@ xfs_refcountbt_get_maxrecs(
 STATIC void
 xfs_refcountbt_init_key_from_rec(
 	union xfs_btree_key		*key,
-	union xfs_btree_rec	*rec)
+	const union xfs_btree_rec	*rec)
 {
 	key->refc.rc_startblock = rec->refc.rc_startblock;
 }
@@ -144,7 +144,7 @@ xfs_refcountbt_init_key_from_rec(
 STATIC void
 xfs_refcountbt_init_high_key_from_rec(
 	union xfs_btree_key		*key,
-	union xfs_btree_rec	*rec)
+	const union xfs_btree_rec	*rec)
 {
 	__u32				x;
 

fs/xfs/libxfs/xfs_rmap_btree.c

@@ -157,7 +157,7 @@ xfs_rmapbt_get_maxrecs(
 STATIC void
 xfs_rmapbt_init_key_from_rec(
 	union xfs_btree_key		*key,
-	union xfs_btree_rec	*rec)
+	const union xfs_btree_rec	*rec)
 {
 	key->rmap.rm_startblock = rec->rmap.rm_startblock;
 	key->rmap.rm_owner = rec->rmap.rm_owner;
@@ -174,7 +174,7 @@ xfs_rmapbt_init_key_from_rec(
 STATIC void
 xfs_rmapbt_init_high_key_from_rec(
 	union xfs_btree_key		*key,
-	union xfs_btree_rec	*rec)
+	const union xfs_btree_rec	*rec)
 {
 	uint64_t			off;
 	int				adj;