[REGRESSION] mainline/master: (build) /tmp/kci/linux/include/linux/signal.h:160:1: error: array index 2 ...

Hello,

New build issue found on mainline/master:

---
 /tmp/kci/linux/include/linux/signal.h:160:1: error: array index 2 is past the end of the array (that has type 'unsigned long[2]') [-Werror,-Warray-bounds] in arch/arm/mach-omap2/powerdomain.o (arch/arm/mach-omap2/powerdomain.c) [logspec:kbuild,kbuild.compiler.error]
---

- dashboard: https://d.kernelci.org/i/maestro:cf5bfe3915050650650fc6d8d002384f83a324d0
- giturl: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
- commit HEAD:  a8dc5f60d127f1d147a8e778563fcef7715d1316


Please include the KernelCI tag when submitting a fix:

Reported-by: kernelci.org bot <[email protected]>


Log excerpt:
=====================================================
In file included from /tmp/kci/linux/arch/arm/mach-omap2/powerdomain.c:21:
In file included from /tmp/kci/linux/include/trace/events/power.h:12:
In file included from /tmp/kci/linux/include/linux/trace_events.h:6:
In file included from /tmp/kci/linux/include/linux/ring_buffer.h:5:
In file included from /tmp/kci/linux/include/linux/mm.h:36:
In file included from /tmp/kci/linux/include/linux/rcuwait.h:6:
In file included from /tmp/kci/linux/include/linux/sched/signal.h:6:
/tmp/kci/linux/include/linux/signal.h:160:1: error: array index 2 is past the end of the array (that has type 'unsigned long[2]') [-Werror,-Warray-bounds]
  160 | _SIG_SET_BINOP(sigandsets, _sig_and)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/tmp/kci/linux/include/linux/signal.h:141:3: note: expanded from macro '_SIG_SET_BINOP'
  141 |                 r->sig[2] = op(a2, b2);                                 \
      |                 ^      ~
/tmp/kci/linux/arch/arm/include/asm/signal.h:17:2: note: array 'sig' declared here
   17 |         unsigned long sig[_NSIG_WORDS];
      |         ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.

=====================================================


# Builds where the incident occurred:

## defconfig+allmodconfig+CONFIG_FRAME_WARN=2048 on (arm):
- compiler: clang-21
- config: None
- dashboard: https://d.kernelci.org/build/maestro:6a23104d46e71b76f9f70fa8


#kernelci issue maestro:cf5bfe3915050650650fc6d8d002384f83a324d0

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