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

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Message-ID: <20250304162402.475eb3bc@canb.auug.org.au>
Date: Tue, 4 Mar 2025 16:25:31 +1100
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: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Linux Next
 Mailing List <linux-next@...r.kernel.org>
Subject: linux-next: build failure after merge of the tip tree

Hi all,

After merging the tip tree, today's linux-next build (x86_64 allmodconfig)
failed like this:

In file included from include/asm-generic/percpu.h:7,
                 from arch/x86/include/asm/percpu.h:597,
                 from arch/x86/include/asm/preempt.h:6,
                 from include/linux/preempt.h:79,
                 from include/linux/spinlock.h:56,
                 from include/linux/wait.h:9,
                 from include/linux/wait_bit.h:8,
                 from include/linux/fs.h:7,
                 from kernel/events/core.c:11:
kernel/events/core.c: In function 'this_cpc':
include/linux/percpu-defs.h:220:45: error: initialization from pointer to non-enclosed address space
  220 |         const void __percpu *__vpp_verify = (typeof((ptr) + 0))NULL;    \
      |                                             ^
include/linux/percpu-defs.h:251:9: note: in expansion of macro '__verify_pcpu_ptr'
  251 |         __verify_pcpu_ptr(ptr);                                         \
      |         ^~~~~~~~~~~~~~~~~
kernel/events/core.c:1222:17: note: in expansion of macro 'this_cpu_ptr'
 1222 |         return *this_cpu_ptr(pmu->cpu_pmu_context);
      |                 ^~~~~~~~~~~~

(and many more similar)

Presumably caused by commit

  f67d1ffd841f ("perf/core: Detach 'struct perf_cpu_pmu_context' and 'struct pmu' lifetimes")

I have used the tip tree from next-20250303 for today.

-- 
Cheers,
Stephen Rothwell