btrfs: constify pointer parameters where applicable

We can add const to many parameters, this is for clarity and minor
addition to safety. There are some minor effects, in the assembly
code and .ko measured on release config. This patch does not cover all
possible conversions.

Signed-off-by: David Sterba <dsterba@suse.com>

1 files changed, 11 insertions, 11 deletions

diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index 4d0d0a041faf..31249b5200b7 100644
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -30,7 +30,7 @@
 #include "root-tree.h"
 #include "tree-checker.h"
 
-enum btrfs_qgroup_mode btrfs_qgroup_mode(struct btrfs_fs_info *fs_info)
+enum btrfs_qgroup_mode btrfs_qgroup_mode(const struct btrfs_fs_info *fs_info)
 {
 	if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags))
 		return BTRFS_QGROUP_MODE_DISABLED;
@@ -39,12 +39,12 @@ enum btrfs_qgroup_mode btrfs_qgroup_mode(struct btrfs_fs_info *fs_info)
 	return BTRFS_QGROUP_MODE_FULL;
 }
 
-bool btrfs_qgroup_enabled(struct btrfs_fs_info *fs_info)
+bool btrfs_qgroup_enabled(const struct btrfs_fs_info *fs_info)
 {
 	return btrfs_qgroup_mode(fs_info) != BTRFS_QGROUP_MODE_DISABLED;
 }
 
-bool btrfs_qgroup_full_accounting(struct btrfs_fs_info *fs_info)
+bool btrfs_qgroup_full_accounting(const struct btrfs_fs_info *fs_info)
 {
 	return btrfs_qgroup_mode(fs_info) == BTRFS_QGROUP_MODE_FULL;
 }
@@ -107,7 +107,7 @@ static void qgroup_rsv_release(struct btrfs_fs_info *fs_info,
 
 static void qgroup_rsv_add_by_qgroup(struct btrfs_fs_info *fs_info,
 				     struct btrfs_qgroup *dest,
-				     struct btrfs_qgroup *src)
+				     const struct btrfs_qgroup *src)
 {
 	int i;
 
@@ -117,7 +117,7 @@ static void qgroup_rsv_add_by_qgroup(struct btrfs_fs_info *fs_info,
 
 static void qgroup_rsv_release_by_qgroup(struct btrfs_fs_info *fs_info,
 					 struct btrfs_qgroup *dest,
-					  struct btrfs_qgroup *src)
+					 const struct btrfs_qgroup *src)
 {
 	int i;
 
@@ -141,14 +141,14 @@ static void btrfs_qgroup_update_new_refcnt(struct btrfs_qgroup *qg, u64 seq,
 	qg->new_refcnt += mod;
 }
 
-static inline u64 btrfs_qgroup_get_old_refcnt(struct btrfs_qgroup *qg, u64 seq)
+static inline u64 btrfs_qgroup_get_old_refcnt(const struct btrfs_qgroup *qg, u64 seq)
 {
 	if (qg->old_refcnt < seq)
 		return 0;
 	return qg->old_refcnt - seq;
 }
 
-static inline u64 btrfs_qgroup_get_new_refcnt(struct btrfs_qgroup *qg, u64 seq)
+static inline u64 btrfs_qgroup_get_new_refcnt(const struct btrfs_qgroup *qg, u64 seq)
 {
 	if (qg->new_refcnt < seq)
 		return 0;
@@ -171,7 +171,7 @@ qgroup_rescan_init(struct btrfs_fs_info *fs_info, u64 progress_objectid,
 static void qgroup_rescan_zero_tracking(struct btrfs_fs_info *fs_info);
 
 /* must be called with qgroup_ioctl_lock held */
-static struct btrfs_qgroup *find_qgroup_rb(struct btrfs_fs_info *fs_info,
+static struct btrfs_qgroup *find_qgroup_rb(const struct btrfs_fs_info *fs_info,
 					   u64 qgroupid)
 {
 	struct rb_node *n = fs_info->qgroup_tree.rb_node;
@@ -346,7 +346,7 @@ static int del_relation_rb(struct btrfs_fs_info *fs_info,
 }
 
 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
-int btrfs_verify_qgroup_counts(struct btrfs_fs_info *fs_info, u64 qgroupid,
+int btrfs_verify_qgroup_counts(const struct btrfs_fs_info *fs_info, u64 qgroupid,
 			       u64 rfer, u64 excl)
 {
 	struct btrfs_qgroup *qgroup;
@@ -608,7 +608,7 @@ out:
  * Return false if no reserved space is left.
  * Return true if some reserved space is leaked.
  */
-bool btrfs_check_quota_leak(struct btrfs_fs_info *fs_info)
+bool btrfs_check_quota_leak(const struct btrfs_fs_info *fs_info)
 {
 	struct rb_node *node;
 	bool ret = false;
@@ -4903,7 +4903,7 @@ void btrfs_free_squota_rsv(struct btrfs_fs_info *fs_info, u64 root, u64 rsv_byte
 }
 
 int btrfs_record_squota_delta(struct btrfs_fs_info *fs_info,
-			      struct btrfs_squota_delta *delta)
+			      const struct btrfs_squota_delta *delta)
 {
 	int ret;
 	struct btrfs_qgroup *qgroup;