From: Kai Song <songkai01@inspur.com>
Date: Sun, 3 Oct 2021 08:06:56 +0000 (+0800)
Subject: btrfs: zoned: use kmemdup() to replace kmalloc + memcpy
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=64259baa396f185cdb44eeb9432fd9b85b178a9a;p=linux.git

btrfs: zoned: use kmemdup() to replace kmalloc + memcpy

Fix memdup.cocci warning:
fs/btrfs/zoned.c:1198:23-30: WARNING opportunity for kmemdup

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Kai Song <songkai01@inspur.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---

diff --git a/fs/btrfs/zoned.c b/fs/btrfs/zoned.c
index 14ea6797bf492..67d932d707984 100644
--- a/fs/btrfs/zoned.c
+++ b/fs/btrfs/zoned.c
@@ -1195,14 +1195,12 @@ int btrfs_load_block_group_zone_info(struct btrfs_block_group *cache, bool new)
 
 	map = em->map_lookup;
 
-	cache->physical_map = kmalloc(map_lookup_size(map->num_stripes), GFP_NOFS);
+	cache->physical_map = kmemdup(map, map_lookup_size(map->num_stripes), GFP_NOFS);
 	if (!cache->physical_map) {
 		ret = -ENOMEM;
 		goto out;
 	}
 
-	memcpy(cache->physical_map, map, map_lookup_size(map->num_stripes));
-
 	alloc_offsets = kcalloc(map->num_stripes, sizeof(*alloc_offsets), GFP_NOFS);
 	if (!alloc_offsets) {
 		ret = -ENOMEM;