netdev - Re: [PATCH] devlink: fix libc and kernel headers collision

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Message-ID: <20190603090259.GA29017@dell5510>
Date:   Mon, 3 Jun 2019 11:02:59 +0200
From:   Petr Vorel <pvorel@...e.cz>
To:     Baruch Siach <baruch@...s.co.il>
Cc:     Stephen Hemminger <stephen@...workplumber.org>,
        netdev@...r.kernel.org, Aya Levin <ayal@...lanox.com>,
        Moshe Shemesh <moshe@...lanox.com>
Subject: Re: [PATCH] devlink: fix libc and kernel headers collision

Hi,

> Since commit 2f1242efe9d ("devlink: Add devlink health show command") we
> use the sys/sysinfo.h header for the sysinfo(2) system call. But since
> iproute2 carries a local version of the kernel struct sysinfo, this
> causes a collision with libc that do not rely on kernel defined sysinfo
> like musl libc:

> In file included from devlink.c:25:0:
> .../sysroot/usr/include/sys/sysinfo.h:10:8: error: redefinition of 'struct sysinfo'
>  struct sysinfo {
>         ^~~~~~~
> In file included from ../include/uapi/linux/kernel.h:5:0,
>                  from ../include/uapi/linux/netlink.h:5,
>                  from ../include/uapi/linux/genetlink.h:6,
>                  from devlink.c:21:
> ../include/uapi/linux/sysinfo.h:8:8: note: originally defined here
>  struct sysinfo {
> 		^~~~~~~

> Rely on the kernel header alone to avoid kernel and userspace headers
> collision of definitions.

Reviewed-by: Petr Vorel <pvorel@...e.cz>


Kind regards,
Petr