staging: lustre: Use kmemdup rather than duplicating its implementation

---
 drivers/staging/lustre/lustre/llite/xattr_cache.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
 
diff --git a/drivers/staging/lustre/lustre/llite/xattr_cache.c b/drivers/staging/lustre/lustre/llite/xattr_cache.c
index 7e2fcfe..da190f9 100644
--- a/drivers/staging/lustre/lustre/llite/xattr_cache.c
+++ b/drivers/staging/lustre/lustre/llite/xattr_cache.c
@@ -132,11 +132,10 @@ static int ll_xattr_cache_add(struct list_head *cache,
 		       xattr->xe_namelen);
 		goto err_name;
 	}
-	xattr->xe_value = kzalloc(xattr_val_len, GFP_NOFS);
+	xattr->xe_value = kmemdup(xattr_val, xattr_val_len, GFP_NOFS);
 	if (!xattr->xe_value)
 		goto err_value;
 
-	memcpy(xattr->xe_value, xattr_val, xattr_val_len);
 	xattr->xe_vallen = xattr_val_len;
 	list_add(&xattr->xe_list, cache);