From: Chris Mason <chris.mason@oracle.com>
Date: Thu, 17 Jan 2008 17:01:41 +0000 (-0500)
Subject: Btrfs: Use blk_congestion_wait on older kernels
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=04005cc7a1feef94237204566ccac38571af7991;p=linux-beck.git

Btrfs: Use blk_congestion_wait on older kernels

Signed-off-by: Chris Mason <chris.mason@oracle.com>
---

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index cd29922d4073..731a534f81f5 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -919,8 +919,13 @@ void btrfs_throttle(struct btrfs_root *root)
 	struct backing_dev_info *bdi;
 
 	bdi = root->fs_info->sb->s_bdev->bd_inode->i_mapping->backing_dev_info;
-	if (root->fs_info->throttles && bdi_write_congested(bdi))
+	if (root->fs_info->throttles && bdi_write_congested(bdi)) {
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,18)
 		congestion_wait(WRITE, HZ/20);
+#else
+		blk_congestion_wait(WRITE, HZ/20);
+#endif
+	}
 }
 
 void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr)