linux-kernel - Re: linux-next: build failure after merge of the akpm tree

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Date:	Tue, 24 Sep 2013 20:21:50 -0500
From:	Timur Tabi <timur@...i.org>
To:	Stephen Rothwell <sfr@...b.auug.org.au>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Greg KH <greg@...ah.com>, lkml <linux-kernel@...r.kernel.org>,
	Sergei Trofimovich <slyfox@...too.org>,
	"linux-next@...r.kernel.org" <linux-next@...r.kernel.org>,
	ppc-dev <linuxppc-dev@...ts.ozlabs.org>,
	Timur Tabi <timur@...escale.com>
Subject: Re: linux-next: build failure after merge of the akpm tree

On Tue, Sep 24, 2013 at 8:06 PM, Stephen Rothwell <sfr@...b.auug.org.au> wrote:
> Hi Andrew,
>
> After merging the akpm tree, linux-next builds (powerpc allmodconfig)
> fail like this:
>
> drivers/tty/ehv_bytechan.c:362:1: error: type defaults to 'int' in declaration of 'console_initcall' [-Werror=implicit-int]
>
> Caused by commit 0f01cf96c2d4 ("./Makefile: enable -Werror=implicit-int
> and -Werror=strict-prototypes by default") which has bee in linux-next
> since Aug 16.  This commit exposed that fact that
> drivers/tty/ehv_bytechan.c can be built as a module, but has a
> console_initcall (which is not available to modules).

Is this something new?  This code hasn't changed in over two years, so
I'm surprised it suddenly broke.

> This was
> originally introduced in commit dcd83aaff1c8 ("tty/powerpc: introduce the
> ePAPR embedded hypervisor byte channel driver") in v3.2.
>
> Anyone got a good solution?

How about:

#ifndef MODULE

static int __init ehv_bc_console_init(void)
{
    ...
}
console_initcall(ehv_bc_console_init);
#endif
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