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From:   Michael Ellerman <mpe@ellerman.id.au>
To:     Christophe Leroy <christophe.leroy@c-s.fr>,
        Andrew Morton <akpm@linux-foundation.org>,
        Colin Ian King <colin.king@canonical.com>,
        Kees Cook <keescook@chromium.org>
Cc:     linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH] lib: fix build failure in CONFIG_DEBUG_VIRTUAL test
In-Reply-To: <40d63adb6058b1fbb4082ca6f15225cb6e76bd62.1544429175.git.christophe.leroy@c-s.fr>
References: <40d63adb6058b1fbb4082ca6f15225cb6e76bd62.1544429175.git.christophe.leroy@c-s.fr>
Date:   Thu, 13 Dec 2018 14:09:45 +1100
Message-ID: <874lbiw29y.fsf@concordia.ellerman.id.au>
MIME-Version: 1.0
Content-Type: text/plain
Sender: linux-kernel-owner@vger.kernel.org
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Christophe Leroy <christophe.leroy@c-s.fr> writes:

> On several arches, virt_to_phys() is in io.h
>
> Build fails without it:
>
>   CC      lib/test_debug_virtual.o
> lib/test_debug_virtual.c: In function 'test_debug_virtual_init':
> lib/test_debug_virtual.c:26:7: error: implicit declaration of function 'virt_to_phys' [-Werror=implicit-function-declaration]
>   pa = virt_to_phys(va);
>        ^
>
> Fixes: e4dace361552 ("lib: add test module for CONFIG_DEBUG_VIRTUAL")
> CC: stable@vger.kernel.org
> Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
> ---
>  lib/test_debug_virtual.c | 1 +
>  1 file changed, 1 insertion(+)

I'm going to take this via the powerpc tree, because otherwise
Christophe's patch to implement CONFIG_DEBUG_VIRTUAL for powerpc will
break the build for us.

Hopefully no one minds :)

cheers