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Date: Wed, 30 May 2018 22:04:51 +0200
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Guenter Roeck <linux@roeck-us.net>, stable <stable@vger.kernel.org>
Subject: Re: Patches for -stable to improve support for recent gcc versions
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On Wed, May 30, 2018 at 09:34:34PM +0200, Arnd Bergmann wrote:
> On Wed, May 30, 2018 at 9:24 PM, Greg Kroah-Hartman
> > Why is that not an option enabled for all arches right now for gcc-8?
> 
> I would still want this warning enabled by default in future kernels,
> just disabled
> for the system call definitions (until we decide to rework the way
> they are defined).
> 
> What I'd suggest we do is a series of patches:
> 
> 1. disable both -Wno-attribute-alias and -Wstringop-truncation by
> default, but leave them
>     enabled in 'make W=1'. Mark this one for stable backports
> 2. add a macro to let users disable warnings locally within a file,
> based on _Pragma("GCC
>     diagnostic ...")
> 3. change the system call macros to disable -Wno-attribute-alias inside of the
>     SYSCALL_DEFINEx() macros
> 4. turn on -Wno-attribute-alias again by default.

That sounds like a good plan to me.