From: Liu Bo <bo.li.liu@oracle.com>
Date: Sat, 14 May 2016 00:06:59 +0000 (-0700)
Subject: Btrfs: free sys_array eb as soon as possible
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=1c8b5b6e8b570a8038fa42cf9e7c23782bd4882c;p=linux-beck.git

Btrfs: free sys_array eb as soon as possible

While reading sys_chunk_array in superblock, btrfs creates a temporary
extent buffer.  Since we don't use it after finishing reading
 sys_chunk_array, we don't need to keep it in memory.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index e0290303bb35..fd3e8280b549 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -6630,13 +6630,13 @@ int btrfs_read_sys_array(struct btrfs_root *root)
 		sb_array_offset += len;
 		cur_offset += len;
 	}
-	free_extent_buffer(sb);
+	free_extent_buffer_stale(sb);
 	return ret;
 
 out_short_read:
 	printk(KERN_ERR "BTRFS: sys_array too short to read %u bytes at offset %u\n",
 			len, cur_offset);
-	free_extent_buffer(sb);
+	free_extent_buffer_stale(sb);
 	return -EIO;
 }