Subject: Re: linux-next: build failure after merge of the rcu tree

From: "Paul E. McKenney" <[email-masked]>
Date: Mon, 16 Apr 2012 10:02:30 -0700

On Mon, Apr 16, 2012 at 02:11:17PM +1000, Stephen Rothwell wrote:
> Hi Paul,
> 
> After merging the rcu tree, today's linux-next build (powerpc
> ppc64_defconfig) failed like this:
> 
> fs/binfmt_misc.c: In function 'create_entry':
> fs/binfmt_misc.c:314:2: error: implicit declaration of function '_copy_from_user' [-Werror=implicit-function-declaration]
> 
> Caused by commit d17faaa53e2e ("fs: Silence bogus copy_to_user() build
> errors").  _copy_from_user() appears to only exist for the x86 and tile
> architectures ...
> 
> I have used the rcu tree from next-20120413 for today.

<red face>

It turns out that bug that commit d17faaa53e2e was working around has
been fixed in 3.4-rc2, so I have dropped that patch and reposted the
series.  Please accept my apologies for the hassle!

							Thanx, Paul