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

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Message-ID: <20240911153854.240bbc1f@canb.auug.org.au>
Date: Wed, 11 Sep 2024 15:38:54 +1000
From: Stephen Rothwell <sfr@...b.auug.org.au>
To: Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>,
 "H. Peter Anvin" <hpa@...or.com>, Peter Zijlstra <peterz@...radead.org>
Cc: Kan Liang <kan.liang@...ux.intel.com>, Linux Kernel Mailing List
 <linux-kernel@...r.kernel.org>, Linux Next Mailing List
 <linux-next@...r.kernel.org>
Subject: linux-next: build warning after merge of the tip tree

Hi all,

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")

-- 
Cheers,
Stephen Rothwell

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