btrfs: zlib: don't cache sectorsize in a local variable

The sectorsize is used once or at most twice in the callbacks, no need
to cache it on stack.

Signed-off-by: David Sterba <dsterba@suse.com>

Author: kdave

fs/btrfs/zlib.c

@@ -71,7 +71,6 @@ static bool need_special_buffer(struct btrfs_fs_info *fs_info)
 
 struct list_head *zlib_alloc_workspace(struct btrfs_fs_info *fs_info, unsigned int level)
 {
-	const u32 blocksize = fs_info->sectorsize;
 	struct workspace *workspace;
 	int workspacesize;
 
@@ -91,8 +90,8 @@ struct list_head *zlib_alloc_workspace(struct btrfs_fs_info *fs_info, unsigned i
 		workspace->buf_size = ZLIB_DFLTCC_BUF_SIZE;
 	}
 	if (!workspace->buf) {
-		workspace->buf = kmalloc(blocksize, GFP_KERNEL);
-		workspace->buf_size = blocksize;
+		workspace->buf = kmalloc(fs_info->sectorsize, GFP_KERNEL);
+		workspace->buf_size = fs_info->sectorsize;
 	}
 	if (!workspace->strm.workspace || !workspace->buf)
 		goto fail;
@@ -159,7 +158,6 @@ int zlib_compress_bio(struct list_head *ws, struct compressed_bio *cb)
 	char *data_in = NULL;
 	struct folio *in_folio = NULL;
 	struct folio *out_folio = NULL;
-	const u32 blocksize = fs_info->sectorsize;
 	const u64 orig_end = start + len;
 
 	ret = zlib_deflateInit(&workspace->strm, workspace->level);
@@ -240,7 +238,7 @@ int zlib_compress_bio(struct list_head *ws, struct compressed_bio *cb)
 		}
 
 		/* We're making it bigger, give up. */
-		if (workspace->strm.total_in > blocksize * 2 &&
+		if (workspace->strm.total_in > fs_info->sectorsize * 2 &&
 		    workspace->strm.total_in < workspace->strm.total_out) {
 			ret = -E2BIG;
 			goto out;