linux-kernel - Re: [PATCH] net/3com/3c515: Fix MODULE_ARCH

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Date:   Sat, 11 Apr 2020 21:10:15 +0300
From:   Leon Romanovsky <leon@...nel.org>
To:     Borislav Petkov <bp@...en8.de>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Tom Lendacky <thomas.lendacky@....com>,
        Keyur Chudgar <keyur@...amperecomputing.com>,
        Don Fry <pcnet32@...ntier.com>,
        Veaceslav Falico <vfalico@...il.com>,
        Jay Vosburgh <j.vosburgh@...il.com>, linux-acenic@...site.dk,
        Maxime Ripard <mripard@...nel.org>,
        Heiko Stuebner <heiko@...ech.de>,
        Mark Einon <mark.einon@...il.com>,
        Chris Snook <chris.snook@...il.com>,
        linux-rockchip@...ts.infradead.org,
        Iyappan Subramanian <iyappan@...amperecomputing.com>,
        Igor Russkikh <irusskikh@...vell.com>,
        David Dillow <dave@...dillows.org>,
        Netanel Belgazal <netanel@...zon.com>,
        Quan Nguyen <quan@...amperecomputing.com>,
        Jay Cliburn <jcliburn@...il.com>,
        Lino Sanfilippo <LinoSanfilippo@....de>,
        linux-arm-kernel@...ts.infradead.org,
        Andreas Larsson <andreas@...sler.com>,
        Andy Gospodarek <andy@...yhouse.net>, netdev@...r.kernel.org,
        Thor Thayer <thor.thayer@...ux.intel.com>,
        linux-kernel@...r.kernel.org, Ion Badulescu <ionut@...ula.org>,
        Arthur Kiyanovski <akiyano@...zon.com>,
        Jes Sorensen <jes@...ined-monkey.org>,
        nios2-dev@...ts.rocketboards.org, Chen-Yu Tsai <wens@...e.org>
Subject: Re: [PATCH] net/3com/3c515: Fix MODULE_ARCH_VERMAGIC redefinition

On Sat, Apr 11, 2020 at 07:35:04PM +0200, Borislav Petkov wrote:
> On Sat, Apr 11, 2020 at 07:11:56PM +0300, Leon Romanovsky wrote:
> > Probably, this is the right change, but I have a feeling that the right
> > solution will be inside headers itself. It is a little bit strange that
> > both very common kernel headers like module.h and vermagic.h are location
> > dependant.
>
> Judging by how only a couple of net drivers include vermagic.h directly,
> doh, of course:
>
> diff --git a/drivers/net/ethernet/3com/3c509.c b/drivers/net/ethernet/3com/3c509.c
> index b762176a1406..139d0120f511 100644
> --- a/drivers/net/ethernet/3com/3c509.c
> +++ b/drivers/net/ethernet/3com/3c509.c
> @@ -85,7 +85,6 @@
>  #include <linux/device.h>
>  #include <linux/eisa.h>
>  #include <linux/bitops.h>
> -#include <linux/vermagic.h>
>
>  #include <linux/uaccess.h>
>  #include <asm/io.h>
> diff --git a/drivers/net/ethernet/3com/3c515.c b/drivers/net/ethernet/3com/3c515.c
> index 90312fcd6319..47b4215bb93b 100644
> --- a/drivers/net/ethernet/3com/3c515.c
> +++ b/drivers/net/ethernet/3com/3c515.c
> @@ -22,7 +22,6 @@
>
>  */
>
> -#include <linux/vermagic.h>
>  #define DRV_NAME		"3c515"
>
>  #define CORKSCREW 1
>
> ---
>
> Drivers include
>
> #include <linux/module.h>
>
> which includes
>
> #include <asm/module.h>
>
> which defines the arch-specific MODULE_ARCH_VERMAGIC.
>
> Why did you need to include vermagic.h directly? i386 builds fine with
> the vermagic.h includes removed or was it some other arches which needed
> it?

I want to think that it was an outcome of some 0-day kbuild report,
but I am not sure about that anymore [1].

Thanks

[1] https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org/

>
> Thx.
>
> --
> Regards/Gruss,
>     Boris.
>
> https://people.kernel.org/tglx/notes-about-netiquette