netdev - Re: [PATCH v4 3/4] net: socket: simplify dev

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Date:   Tue, 24 Nov 2020 12:52:35 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Arnd Bergmann <arnd@...nel.org>
Cc:     netdev@...r.kernel.org, Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH v4 3/4] net: socket: simplify dev_ifconf handling

On Tue, 24 Nov 2020 16:18:27 +0100 Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> The dev_ifconf() calling conventions make compat handling
> more complicated than necessary, simplify this by moving
> the in_compat_syscall() check into the function.
> The implementation can be simplified further, based on the
> knowledge that the dynamic registration is only ever used
> for IPv4.

Looks like this one breaks bisection (/breaks build which patch 4 then
fixes):


In file included from ../arch/x86/include/asm/sigframe.h:8,
                 from ../arch/x86/kernel/asm-offsets.c:17:
../include/linux/compat.h:348:29: error: field ‘ifru_settings’ has incomplete type
  348 |   struct compat_if_settings ifru_settings;
      |                             ^~~~~~~~~~~~~
../include/linux/compat.h:352:8: error: redefinition of ‘struct compat_ifconf’
  352 | struct compat_ifconf {
      |        ^~~~~~~~~~~~~
../include/linux/compat.h:108:8: note: originally defined here
  108 | struct compat_ifconf {
      |        ^~~~~~~~~~~~~
make[2]: *** [arch/x86/kernel/asm-offsets.s] Error 1
make[1]: *** [prepare0] Error 2
make: *** [__sub-make] Error 2