linux-kernel - linux-next: block tree build failure

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Date:	Tue, 7 Jul 2009 13:49:08 +1000
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Jens Axboe <jens.axboe@...cle.com>
Cc:	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>
Subject: linux-next: block tree build failure

Hi Jens,

Today's linux-next build (powerpc ppc64_defconfig) failed like this:

fs/sync.c: In function 'sys_sync':
fs/sync.c:121: error: implicit declaration of function 'wakeup_pdflush'

Caused by commit 1728603e84b339be5d5abd392ed3ec5936253863 ("writeback:
switch to per-bdi threads for flushing data") from the block tree
interacting with commit 3beab0b42413e83a7907db7176b54c840fc75a81
("sys_sync(): fix 16% performance regression in ffsb create_4k test")
from Linus' tree.

I added the following patch as part of the block tree merge for today.  I
have no idea if it is correct.
-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au

From: Stephen Rothwell <sfr@...b.auug.org.au>
Date: Tue, 7 Jul 2009 13:34:26 +1000
Subject: [PATCH] block: pdflush fixup

Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
---
 fs/sync.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/fs/sync.c b/fs/sync.c
index 3422ba6..bf03fc7 100644
--- a/fs/sync.c
+++ b/fs/sync.c
@@ -118,7 +118,7 @@ restart:
  */
 SYSCALL_DEFINE0(sync)
 {
-	wakeup_pdflush(0);
+	wakeup_flusher_threads(0);
 	sync_filesystems(0);
 	sync_filesystems(1);
 	if (unlikely(laptop_mode))
-- 
1.6.3.3

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