Re: [PATCH] correct disabling of -Wshift-negative-value

[Jan Beulich <jbeulich@suse.com>]

On 14.04.2025 21:38, Nathan Chancellor wrote:
> On Mon, Apr 14, 2025 at 04:23:36PM +0200, Jan Beulich wrote:
>> The warning is supported only from gcc6 onwards, hence its disabling
>> needs probing that the (positive) option is actually supported.
>>
>> Fixes: 1344794a59db ("Kbuild: add -Wno-shift-negative-value where -Wextra is used")
>> Signed-off-by: Jan Beulich <jbeulich@suse.com>
> 
> The patch itself seems fine (I might add "scripts/Makefile.extrawarn: "
> to the title) but if I understand correctly, this is only to support GCC
> 5? Would this be necessary if GCC 8.1 becomes the minimum supported
> version of GCC for building the kernel?
> 
> https://lore.kernel.org/20250407094116.1339199-2-arnd@kernel.org/
> 
> If people are actively noticing this, perhaps we should send this to
> Linus's tree for backports then Arnd could revert it in his series?

Actually, aiui that work was meanwhile merged. Hence the patch here is
indeed only applicable to stable trees. No idea how such a situation
is to be handled. (Apparently the same is true for "correct disabling
of -Wstringop-overflow": That option was introduced in gcc7.)

Jan