mm: zpool: constify the zpool_ops

The structure zpool_ops is not modified so make the pointer to it a
pointer to const.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: Dan Streetman <ddstreet@ieee.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

5 files changed, 9 insertions, 8 deletions

diff --git a/include/linux/zpool.h b/include/linux/zpool.h
index d30eff3..c924a28 100644
--- a/include/linux/zpool.h
+++ b/include/linux/zpool.h
@@ -37,7 +37,7 @@ enum zpool_mapmode {
 };
 
 struct zpool *zpool_create_pool(char *type, char *name,
-			gfp_t gfp, struct zpool_ops *ops);
+			gfp_t gfp, const struct zpool_ops *ops);
 
 char *zpool_get_type(struct zpool *pool);
 
@@ -81,7 +81,7 @@ struct zpool_driver {
 	atomic_t refcount;
 	struct list_head list;
 
-	void *(*create)(char *name, gfp_t gfp, struct zpool_ops *ops,
+	void *(*create)(char *name, gfp_t gfp, const struct zpool_ops *ops,
 			struct zpool *zpool);
 	void (*destroy)(void *pool);
 
diff --git a/mm/zbud.c b/mm/zbud.c
index f3bf6f7..6f8158d 100644
--- a/mm/zbud.c
+++ b/mm/zbud.c
@@ -99,7 +99,7 @@ struct zbud_pool {
 	struct zbud_ops *ops;
 #ifdef CONFIG_ZPOOL
 	struct zpool *zpool;
-	struct zpool_ops *zpool_ops;
+	const struct zpool_ops *zpool_ops;
 #endif
 };
 
@@ -138,7 +138,7 @@ static struct zbud_ops zbud_zpool_ops = {
 };
 
 static void *zbud_zpool_create(char *name, gfp_t gfp,
-			       struct zpool_ops *zpool_ops,
+			       const struct zpool_ops *zpool_ops,
 			       struct zpool *zpool)
 {
 	struct zbud_pool *pool;
diff --git a/mm/zpool.c b/mm/zpool.c
index 722a4f6..951db32 100644
--- a/mm/zpool.c
+++ b/mm/zpool.c
@@ -22,7 +22,7 @@ struct zpool {
 
 	struct zpool_driver *driver;
 	void *pool;
-	struct zpool_ops *ops;
+	const struct zpool_ops *ops;
 
 	struct list_head list;
 };
@@ -115,7 +115,7 @@ static void zpool_put_driver(struct zpool_driver *driver)
  * Returns: New zpool on success, NULL on failure.
  */
 struct zpool *zpool_create_pool(char *type, char *name, gfp_t gfp,
-		struct zpool_ops *ops)
+		const struct zpool_ops *ops)
 {
 	struct zpool_driver *driver;
 	struct zpool *zpool;
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 0891204..f135b1b 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -311,7 +311,8 @@ static void record_obj(unsigned long handle, unsigned long obj)
 
 #ifdef CONFIG_ZPOOL
 
-static void *zs_zpool_create(char *name, gfp_t gfp, struct zpool_ops *zpool_ops,
+static void *zs_zpool_create(char *name, gfp_t gfp,
+			     const struct zpool_ops *zpool_ops,
 			     struct zpool *zpool)
 {
 	return zs_create_pool(name, gfp);
diff --git a/mm/zswap.c b/mm/zswap.c
index 09208c7..48a1d08 100644
--- a/mm/zswap.c
+++ b/mm/zswap.c
@@ -755,7 +755,7 @@ static void zswap_frontswap_invalidate_area(unsigned type)
 	zswap_trees[type] = NULL;
 }
 
-static struct zpool_ops zswap_zpool_ops = {
+static const struct zpool_ops zswap_zpool_ops = {
 	.evict = zswap_writeback_entry
 };