From: David Sterba <dsterba@suse.com>
Date: Wed, 31 May 2017 16:40:02 +0000 (+0200)
Subject: btrfs: send: use kvmalloc in iterate_dir_item
X-Git-Tag: v4.13-rc1~150^2~65
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=f11f74416ae6e63a6d6db9c5b22666a0aa57b881;p=karo-tx-linux.git

btrfs: send: use kvmalloc in iterate_dir_item

We use a growing buffer for xattrs larger than a page size, at some
point vmalloc is unconditionally used for larger buffers. We can still
try to avoid it using the kvmalloc helper.

Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---

diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index 924b1d941b53..7416b17c0eac 100644
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -1083,7 +1083,7 @@ static int iterate_dir_item(struct btrfs_root *root, struct btrfs_path *path,
 				buf = tmp;
 			}
 			if (!buf) {
-				buf = vmalloc(buf_len);
+				buf = kvmalloc(buf_len, GFP_KERNEL);
 				if (!buf) {
 					ret = -ENOMEM;
 					goto out;