linux-kernel - Re: [PATCH] cxl: Fix error handling

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Message-ID: <CA+r1ZhiJW6xQ1VwgLudFzFBxkKzkURv7MZhWtmSevRHc9aUyxA@mail.gmail.com>
Date:   Tue, 1 Nov 2016 16:36:35 -0700
From:   Jim Davis <jim.epost@...il.com>
To:     Michael Ellerman <mpe@...erman.id.au>
Cc:     Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        imunsie@....ibm.com, fbarrat@...ux.vnet.ibm.com,
        kernel-janitors@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] cxl: Fix error handling

On Sun, Oct 30, 2016 at 10:37 PM, Michael Ellerman <mpe@...erman.id.au> wrote:
> Christophe JAILLET <christophe.jaillet@...adoo.fr> writes:
>
>> 'cxl_dev_context_init()' returns an error pointer in case of error, not
>> NULL. So test it with IS_ERR.
>>
>> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
>> ---
>> un-compiled because I don't have the required  cross build environment.
>
> Do you run Ubuntu or Fedora? If so it's just a dnf/apt-get away:
>
> $ sudo dnf install gcc-c++-powerpc64-linux-gnu binutils-powerpc64-linux-gnu gcc-powerpc64-linux-gnu
> or
> $ sudo apt-get install gcc-powerpc64le-linux-gnu gcc-powerpc-linux-gnu libc-dev-powerpc-cross libc-dev-ppc64el-cross
>
> More here:
>
> https://github.com/linuxppc/linux/wiki/Building-powerpc-kernels

Cool; the little-endian build worked fine, but

jim@...bstar:~/linux-rc$ make ARCH=powerpc
CROSS_COMPILE=powerpc64-linux-gnu- vmlinux
make: powerpc64-linux-gnu-gcc: Command not found
make: powerpc64-linux-gnu-gcc: Command not found
scripts/kconfig/conf  --silentoldconfig Kconfig
make: powerpc64-linux-gnu-gcc: Command not found

This is on Ubuntu 16.04; there's a /usr/bin/powerpc64le-linux-gnu-gcc
from installing gcc-powerpc64le-linux-gnu, and a
/usr/bin/powerpc-linux-gnu-gcc from installing gcc-powerpc-linux-gnu,
but no /usr/bin/powerpc64-linux-gnu-gcc.

-- 
Jim