linux-kernel - [PATCH] ocfs2: Add const to various occurrences of struct ocfs2_lock_res

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Date:   Sun, 19 Feb 2017 21:27:49 +0530
From:   Bhumika Goyal <bhumirks@...il.com>
To:     julia.lawall@...6.fr, mfasheh@...sity.com, jlbec@...lplan.org,
        ocfs2-devel@....oracle.com, linux-kernel@...r.kernel.org
Cc:     Bhumika Goyal <bhumirks@...il.com>
Subject: [PATCH] ocfs2: Add const to various occurrences of struct ocfs2_lock_res_ops

The field l_ops of structure ocfs2_lock_res can be made const as it
never modified after getting initialized. After making this change the
parameter struct ocfs2_lock_res_ops *ops of function
ocfs2_lock_res_init_common can be made const as ops is only stored
in l_ops. Now the structures of type ocfs2_lock_res_ops can be made
const as they are only passed as an argument to the above updated function.

Signed-off-by: Bhumika Goyal <bhumirks@...il.com>
---
 fs/ocfs2/dlmglue.c | 26 +++++++++++++-------------
 fs/ocfs2/ocfs2.h   |  2 +-
 2 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
index 77d1632..885f200 100644
--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -233,12 +233,12 @@ struct ocfs2_lock_res_ops {
  */
 #define LOCK_TYPE_USES_LVB		0x2
 
-static struct ocfs2_lock_res_ops ocfs2_inode_rw_lops = {
+static const struct ocfs2_lock_res_ops ocfs2_inode_rw_lops = {
 	.get_osb	= ocfs2_get_inode_osb,
 	.flags		= 0,
 };
 
-static struct ocfs2_lock_res_ops ocfs2_inode_inode_lops = {
+static const struct ocfs2_lock_res_ops ocfs2_inode_inode_lops = {
 	.get_osb	= ocfs2_get_inode_osb,
 	.check_downconvert = ocfs2_check_meta_downconvert,
 	.set_lvb	= ocfs2_set_meta_lvb,
@@ -246,46 +246,46 @@ struct ocfs2_lock_res_ops {
 	.flags		= LOCK_TYPE_REQUIRES_REFRESH|LOCK_TYPE_USES_LVB,
 };
 
-static struct ocfs2_lock_res_ops ocfs2_super_lops = {
+static const struct ocfs2_lock_res_ops ocfs2_super_lops = {
 	.flags		= LOCK_TYPE_REQUIRES_REFRESH,
 };
 
-static struct ocfs2_lock_res_ops ocfs2_rename_lops = {
+static const struct ocfs2_lock_res_ops ocfs2_rename_lops = {
 	.flags		= 0,
 };
 
-static struct ocfs2_lock_res_ops ocfs2_nfs_sync_lops = {
+static const struct ocfs2_lock_res_ops ocfs2_nfs_sync_lops = {
 	.flags		= 0,
 };
 
-static struct ocfs2_lock_res_ops ocfs2_orphan_scan_lops = {
+static const struct ocfs2_lock_res_ops ocfs2_orphan_scan_lops = {
 	.flags		= LOCK_TYPE_REQUIRES_REFRESH|LOCK_TYPE_USES_LVB,
 };
 
-static struct ocfs2_lock_res_ops ocfs2_dentry_lops = {
+static const struct ocfs2_lock_res_ops ocfs2_dentry_lops = {
 	.get_osb	= ocfs2_get_dentry_osb,
 	.post_unlock	= ocfs2_dentry_post_unlock,
 	.downconvert_worker = ocfs2_dentry_convert_worker,
 	.flags		= 0,
 };
 
-static struct ocfs2_lock_res_ops ocfs2_inode_open_lops = {
+static const struct ocfs2_lock_res_ops ocfs2_inode_open_lops = {
 	.get_osb	= ocfs2_get_inode_osb,
 	.flags		= 0,
 };
 
-static struct ocfs2_lock_res_ops ocfs2_flock_lops = {
+static const struct ocfs2_lock_res_ops ocfs2_flock_lops = {
 	.get_osb	= ocfs2_get_file_osb,
 	.flags		= 0,
 };
 
-static struct ocfs2_lock_res_ops ocfs2_qinfo_lops = {
+static const struct ocfs2_lock_res_ops ocfs2_qinfo_lops = {
 	.set_lvb	= ocfs2_set_qinfo_lvb,
 	.get_osb	= ocfs2_get_qinfo_osb,
 	.flags		= LOCK_TYPE_REQUIRES_REFRESH | LOCK_TYPE_USES_LVB,
 };
 
-static struct ocfs2_lock_res_ops ocfs2_refcount_block_lops = {
+static const struct ocfs2_lock_res_ops ocfs2_refcount_block_lops = {
 	.check_downconvert = ocfs2_check_refcount_downconvert,
 	.downconvert_worker = ocfs2_refcount_convert_worker,
 	.flags		= 0,
@@ -497,7 +497,7 @@ static inline void ocfs2_init_start_time(struct ocfs2_mask_waiter *mw)
 static void ocfs2_lock_res_init_common(struct ocfs2_super *osb,
 				       struct ocfs2_lock_res *res,
 				       enum ocfs2_lock_type type,
-				       struct ocfs2_lock_res_ops *ops,
+				       const struct ocfs2_lock_res_ops *ops,
 				       void *priv)
 {
 	res->l_type          = type;
@@ -539,7 +539,7 @@ void ocfs2_inode_lock_res_init(struct ocfs2_lock_res *res,
 			       unsigned int generation,
 			       struct inode *inode)
 {
-	struct ocfs2_lock_res_ops *ops;
+	const struct ocfs2_lock_res_ops *ops;
 
 	switch(type) {
 		case OCFS2_LOCK_TYPE_RW:
diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h
index 7e5958b..691e0813 100644
--- a/fs/ocfs2/ocfs2.h
+++ b/fs/ocfs2/ocfs2.h
@@ -167,7 +167,7 @@ struct ocfs2_lock_stats {
 
 struct ocfs2_lock_res {
 	void                    *l_priv;
-	struct ocfs2_lock_res_ops *l_ops;
+	const struct ocfs2_lock_res_ops *l_ops;
 
 
 	struct list_head         l_blocked_list;
-- 
1.9.1