Subject: Re: linux-next: block tree build failure

From: Jens Axboe <[email-masked]>
Date: Tue, 7 Jul 2009 08:38:46 +0200

On Tue, Jul 07 2009, Stephen Rothwell wrote:
> 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                    [email-masked]
> 
> From: Stephen Rothwell <[email-masked]>
> Date: Tue, 7 Jul 2009 13:34:26 +1000
> Subject: [PATCH] block: pdflush fixup
> 
> Signed-off-by: Stephen Rothwell <[email-masked]>
> ---
>  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))

That is correct! I have just now updated for-next as well, so your next
pull should lose this fixup.

-- 
Jens Axboe