linux-kernel - [PATCH 2/2] configfs: Constify ct_item_ops in struct config_item

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Message-ID: <f43cb57418a7f59e883be8eedc7d6abe802a2094.1761390472.git.christophe.jaillet@wanadoo.fr>
Date: Sat, 25 Oct 2025 13:15:38 +0200
From: Christophe JAILLET <christophe.jaillet@...adoo.fr>
To: a.hindborg@...nel.org,
	leitao@...ian.org
Cc: linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org,
	Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH 2/2] configfs: Constify ct_item_ops in struct config_item_type

Make 'ct_item_ops' const in struct config_item_type.
This allows constification of many structures which hold some function
pointers.

Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
Compile tested only files that explicitly use ct_group_ops.

The script used for that is:
  while IFS= read -r -d '' file; do
    obj="${file%.c}.o" ; echo -e "\nCompiling $file" ; make "$obj"
  done < <(git grep --name-only -z ct_item_ops '*.c')
---
 fs/configfs/file.c       | 2 +-
 include/linux/configfs.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/configfs/file.c b/fs/configfs/file.c
index 0ad32150611e..affe4742bbb5 100644
--- a/fs/configfs/file.c
+++ b/fs/configfs/file.c
@@ -30,7 +30,7 @@ struct configfs_buffer {
 	size_t			count;
 	loff_t			pos;
 	char			* page;
-	struct configfs_item_operations	* ops;
+	const struct configfs_item_operations	*ops;
 	struct mutex		mutex;
 	int			needs_read_fill;
 	bool			read_in_progress;
diff --git a/include/linux/configfs.h b/include/linux/configfs.h
index 31a7d7124460..ef65c75beeaa 100644
--- a/include/linux/configfs.h
+++ b/include/linux/configfs.h
@@ -64,7 +64,7 @@ extern void config_item_put(struct config_item *);
 
 struct config_item_type {
 	struct module				*ct_owner;
-	struct configfs_item_operations		*ct_item_ops;
+	const struct configfs_item_operations	*ct_item_ops;
 	const struct configfs_group_operations	*ct_group_ops;
 	struct configfs_attribute		**ct_attrs;
 	struct configfs_bin_attribute		**ct_bin_attrs;
-- 
2.51.0