btrfs: compression: inline cleanup_workspace_manager

Replace loop calling to all algos with a list of direct calls to the
cleanup manager callback. When that becomes trivial it is replaced by
direct call to the helper.
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/compression.c

@@ -53,6 +53,7 @@ int zstd_decompress(struct list_head *ws, unsigned char *data_in,
 		struct page *dest_page, unsigned long start_byte, size_t srclen,
 		size_t destlen);
 void zstd_init_workspace_manager(void);
+void zstd_cleanup_workspace_manager(void);
 
 static const char* const btrfs_compress_types[] = { "", "zlib", "lzo", "zstd" };
 
@@ -861,11 +862,6 @@ struct heuristic_ws {
 
 static struct workspace_manager heuristic_wsm;
 
-static void heuristic_cleanup_workspace_manager(void)
-{
-	btrfs_cleanup_workspace_manager(BTRFS_COMPRESS_NONE);
-}
-
 static struct list_head *heuristic_get_workspace(unsigned int level)
 {
 	return btrfs_get_workspace(&heuristic_wsm, level);
@@ -917,7 +913,6 @@ static struct list_head *alloc_heuristic_ws(unsigned int level)
 
 const struct btrfs_compress_op btrfs_heuristic_compress = {
 	.workspace_manager = &heuristic_wsm,
-	.cleanup_workspace_manager = heuristic_cleanup_workspace_manager,
 	.get_workspace = heuristic_get_workspace,
 	.put_workspace = heuristic_put_workspace,
 	.alloc_workspace = alloc_heuristic_ws,
@@ -960,7 +955,7 @@ static void btrfs_init_workspace_manager(int type)
 	}
 }
 
-void btrfs_cleanup_workspace_manager(int type)
+static void btrfs_cleanup_workspace_manager(int type)
 {
 	struct workspace_manager *wsman;
 	struct list_head *ws;
@@ -1199,10 +1194,10 @@ void __init btrfs_init_compress(void)
 
 void __cold btrfs_exit_compress(void)
 {
-	int i;
-
-	for (i = 0; i < BTRFS_NR_WORKSPACE_MANAGERS; i++)
-		btrfs_compress_op[i]->cleanup_workspace_manager();
+	btrfs_cleanup_workspace_manager(BTRFS_COMPRESS_NONE);
+	btrfs_cleanup_workspace_manager(BTRFS_COMPRESS_ZLIB);
+	btrfs_cleanup_workspace_manager(BTRFS_COMPRESS_LZO);
+	zstd_cleanup_workspace_manager();
 }
 
 /*

fs/btrfs/compression.h

@@ -123,11 +123,8 @@ struct workspace_manager {
 struct list_head *btrfs_get_workspace(struct workspace_manager *wsm,
 				      unsigned int level);
 void btrfs_put_workspace(struct workspace_manager *wsm, struct list_head *ws);
-void btrfs_cleanup_workspace_manager(int type);
 
 struct btrfs_compress_op {
-	void (*cleanup_workspace_manager)(void);
-
 	struct list_head *(*get_workspace)(unsigned int level);
 
 	void (*put_workspace)(struct list_head *ws);

fs/btrfs/lzo.c

@@ -63,11 +63,6 @@ struct workspace {
 
 static struct workspace_manager wsm;
 
-static void lzo_cleanup_workspace_manager(void)
-{
-	btrfs_cleanup_workspace_manager(BTRFS_COMPRESS_LZO);
-}
-
 static struct list_head *lzo_get_workspace(unsigned int level)
 {
 	return btrfs_get_workspace(&wsm, level);
@@ -499,7 +494,6 @@ int lzo_decompress(struct list_head *ws, unsigned char *data_in,
 
 const struct btrfs_compress_op btrfs_lzo_compress = {
 	.workspace_manager	= &wsm,
-	.cleanup_workspace_manager = lzo_cleanup_workspace_manager,
 	.get_workspace		= lzo_get_workspace,
 	.put_workspace		= lzo_put_workspace,
 	.alloc_workspace	= lzo_alloc_workspace,

fs/btrfs/zlib.c

@@ -29,11 +29,6 @@ struct workspace {
 
 static struct workspace_manager wsm;
 
-static void zlib_cleanup_workspace_manager(void)
-{
-	btrfs_cleanup_workspace_manager(BTRFS_COMPRESS_ZLIB);
-}
-
 static struct list_head *zlib_get_workspace(unsigned int level)
 {
 	struct list_head *ws = btrfs_get_workspace(&wsm, level);
@@ -410,7 +405,6 @@ int zlib_decompress(struct list_head *ws, unsigned char *data_in,
 
 const struct btrfs_compress_op btrfs_zlib_compress = {
 	.workspace_manager	= &wsm,
-	.cleanup_workspace_manager = zlib_cleanup_workspace_manager,
 	.get_workspace		= zlib_get_workspace,
 	.put_workspace		= zlib_put_workspace,
 	.alloc_workspace	= zlib_alloc_workspace,

fs/btrfs/zstd.c

@@ -194,7 +194,7 @@ void zstd_init_workspace_manager(void)
 	}
 }
 
-static void zstd_cleanup_workspace_manager(void)
+void zstd_cleanup_workspace_manager(void)
 {
 	struct workspace *workspace;
 	int i;
@@ -709,7 +709,6 @@ int zstd_decompress(struct list_head *ws, unsigned char *data_in,
 const struct btrfs_compress_op btrfs_zstd_compress = {
 	/* ZSTD uses own workspace manager */
 	.workspace_manager = NULL,
-	.cleanup_workspace_manager = zstd_cleanup_workspace_manager,
 	.get_workspace = zstd_get_workspace,
 	.put_workspace = zstd_put_workspace,
 	.alloc_workspace = zstd_alloc_workspace,