Re: linux-next: build warning after merge of the tip tree

[Stephen Rothwell]

Hi all,

On Wed, 11 Sep 2024 15:38:54 +1000 Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote:
>
> After merging the tip tree, today's linux-next build (arm
> multi_v7_defconfig) produced this warning:
> 
> kernel/events/core.c: In function 'perf_event_setup_cpumask':
> kernel/events/core.c:14012:13: warning: the comparison will always evaluate as 'true' for the address of 'thread_sibling' will never be NULL [-Waddress]
> 14012 |         if (!topology_sibling_cpumask(cpu)) {
>       |             ^
> In file included from include/linux/topology.h:30,
>                  from include/linux/gfp.h:8,
>                  from include/linux/xarray.h:16,
>                  from include/linux/list_lru.h:14,
>                  from include/linux/fs.h:13,
>                  from kernel/events/core.c:11:
> include/linux/arch_topology.h:78:19: note: 'thread_sibling' declared here
>    78 |         cpumask_t thread_sibling;
>       |                   ^~~~~~~~~~~~~~
> 
> Introduced by commit
> 
>   4ba4f1afb6a9 ("perf: Generic hotplug support for a PMU with a scope")

This commit is now in Linus' tree and the warning is till there :-(  In
fact this is a build failure for some configurations.   A fix was
posted on Sep 13 (12?), please get it to Linus as soon as possible.

-- 
Cheers,
Stephen Rothwell

Attachment: pgp5NIZxaR6HE.pgp
Description: OpenPGP digital signature