mm: frontswap: remove casting from function calls through ops structure

Removes unneeded casts.

Reviewed-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

mm/frontswap.c

@@ -111,7 +111,7 @@ void __frontswap_init(unsigned type)
 	if (sis->frontswap_map == NULL)
 		return;
 	if (frontswap_enabled)
-		(*frontswap_ops.init)(type);
+		frontswap_ops.init(type);
 }
 EXPORT_SYMBOL(__frontswap_init);
 
@@ -134,7 +134,7 @@ int __frontswap_store(struct page *page)
 	BUG_ON(sis == NULL);
 	if (frontswap_test(sis, offset))
 		dup = 1;
-	ret = (*frontswap_ops.store)(type, offset, page);
+	ret = frontswap_ops.store(type, offset, page);
 	if (ret == 0) {
 		frontswap_set(sis, offset);
 		inc_frontswap_succ_stores();
@@ -173,7 +173,7 @@ int __frontswap_load(struct page *page)
 	BUG_ON(!PageLocked(page));
 	BUG_ON(sis == NULL);
 	if (frontswap_test(sis, offset))
-		ret = (*frontswap_ops.load)(type, offset, page);
+		ret = frontswap_ops.load(type, offset, page);
 	if (ret == 0)
 		inc_frontswap_loads();
 	return ret;
@@ -190,7 +190,7 @@ void __frontswap_invalidate_page(unsigned type, pgoff_t offset)
 
 	BUG_ON(sis == NULL);
 	if (frontswap_test(sis, offset)) {
-		(*frontswap_ops.invalidate_page)(type, offset);
+		frontswap_ops.invalidate_page(type, offset);
 		atomic_dec(&sis->frontswap_pages);
 		frontswap_clear(sis, offset);
 		inc_frontswap_invalidates();
@@ -209,7 +209,7 @@ void __frontswap_invalidate_area(unsigned type)
 	BUG_ON(sis == NULL);
 	if (sis->frontswap_map == NULL)
 		return;
-	(*frontswap_ops.invalidate_area)(type);
+	frontswap_ops.invalidate_area(type);
 	atomic_set(&sis->frontswap_pages, 0);
 	memset(sis->frontswap_map, 0, sis->max / sizeof(long));
 }