+ powerpc-move-arch_trigger_cpumask_backtrace-from-nmih-to-irqh.patch added to mm-nonmm-unstable branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: powerpc: move arch_trigger_cpumask_backtrace from nmi.h to irq.h
has been added to the -mm mm-nonmm-unstable branch.  Its filename is
     powerpc-move-arch_trigger_cpumask_backtrace-from-nmih-to-irqh.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/powerpc-move-arch_trigger_cpumask_backtrace-from-nmih-to-irqh.patch

This patch will later appear in the mm-nonmm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Before you just go and hit "reply", please:
   a) Consider who else should be cc'ed
   b) Prefer to cc a suitable mailing list as well
   c) Ideally: find the original patch on the mailing list and do a
      reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days

------------------------------------------------------
From: Douglas Anderson <dianders@chromium.org>
Subject: powerpc: move arch_trigger_cpumask_backtrace from nmi.h to irq.h
Date: Wed, 21 Jun 2023 16:48:19 -0700

The powerpc architecture was the only one that defined
arch_trigger_cpumask_backtrace() in asm/nmi.h instead of asm/irq.h.  Move
it to be consistent.

This fixes compile time errors introduced by commit 7ca8fe94aa92
("watchdog/hardlockup: define HARDLOCKUP_DETECTOR_ARCH"). That commit
caused <asm/nmi.h> to stop being included if the hardlockup detector
wasn't enabled. The specific errors were:
  error: implicit declaration of function `nmi_cpu_backtrace'
  error: implicit declaration of function `nmi_trigger_cpumask_backtrace'

Link: https://lkml.kernel.org/r/20230621164809.1.Ice67126857506712559078e7de26d32d26e64631@changeid
Fixes: 7ca8fe94aa92 ("watchdog/hardlockup: define HARDLOCKUP_DETECTOR_ARCH")
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reported-by: Michael Ellerman <mpe@ellerman.id.au>
Closes: https://lore.kernel.org/r/871qi5otdh.fsf@mail.lhotse
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Douglas Anderson <dianders@chromium.org>
Cc: Laurent Dufour <ldufour@linux.ibm.com>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Tom Rix <trix@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 arch/powerpc/include/asm/irq.h |    6 ++++++
 arch/powerpc/include/asm/nmi.h |    6 ------
 2 files changed, 6 insertions(+), 6 deletions(-)

--- a/arch/powerpc/include/asm/irq.h~powerpc-move-arch_trigger_cpumask_backtrace-from-nmih-to-irqh
+++ a/arch/powerpc/include/asm/irq.h
@@ -53,5 +53,11 @@ void __do_IRQ(struct pt_regs *regs);
 
 int irq_choose_cpu(const struct cpumask *mask);
 
+#ifdef CONFIG_NMI_IPI
+extern void arch_trigger_cpumask_backtrace(const cpumask_t *mask,
+					   bool exclude_self);
+#define arch_trigger_cpumask_backtrace arch_trigger_cpumask_backtrace
+#endif
+
 #endif /* _ASM_IRQ_H */
 #endif /* __KERNEL__ */
--- a/arch/powerpc/include/asm/nmi.h~powerpc-move-arch_trigger_cpumask_backtrace-from-nmih-to-irqh
+++ a/arch/powerpc/include/asm/nmi.h
@@ -9,12 +9,6 @@ void watchdog_hardlockup_set_timeout_pct
 static inline void watchdog_hardlockup_set_timeout_pct(u64 pct) {}
 #endif
 
-#ifdef CONFIG_NMI_IPI
-extern void arch_trigger_cpumask_backtrace(const cpumask_t *mask,
-					   bool exclude_self);
-#define arch_trigger_cpumask_backtrace arch_trigger_cpumask_backtrace
-#endif
-
 extern void hv_nmi_check_nonrecoverable(struct pt_regs *regs);
 
 #endif /* _ASM_NMI_H */
_

Patches currently in -mm which might be from dianders@chromium.org are

powerpc-move-arch_trigger_cpumask_backtrace-from-nmih-to-irqh.patch