From: Dave Chinner <dchinner@redhat.com>
Date: Wed, 22 Sep 2010 00:47:20 +0000 (+1000)
Subject: xfs: remove buftarg hash for external devices
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=69d6cc76cff3573ceefda178b75e20878866fdc3;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git

xfs: remove buftarg hash for external devices

For RT and external log devices, we never use hashed buffers on them
now.  Remove the buftarg hash tables that are set up for them.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Alex Elder <aelder@sgi.com>
---

diff --git a/fs/xfs/linux-2.6/xfs_buf.c b/fs/xfs/linux-2.6/xfs_buf.c
index 975d6589394a..251bcdc6352e 100644
--- a/fs/xfs/linux-2.6/xfs_buf.c
+++ b/fs/xfs/linux-2.6/xfs_buf.c
@@ -1458,7 +1458,11 @@ xfs_alloc_bufhash(
 {
 	unsigned int		i;
 
-	btp->bt_hashshift = external ? 3 : 12;	/* 8 or 4096 buckets */
+	if (external) {
+		btp->bt_hash = NULL;
+		return;
+	}
+	btp->bt_hashshift = 12;	/* 4096 buckets */
 	btp->bt_hash = kmem_zalloc_large((1 << btp->bt_hashshift) *
 					 sizeof(xfs_bufhash_t));
 	for (i = 0; i < (1 << btp->bt_hashshift); i++) {