The patch titled
Subject: watchdog/hardlockup: change watchdog_nmi_enable() to void
has been added to the -mm mm-nonmm-unstable branch. Its filename is
watchdog-hardlockup-change-watchdog_nmi_enable-to-void.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/watchdog-hardlockup-change-watchdog_nmi_enable-to-void.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Lecopzer Chen <lecopzer.chen@xxxxxxxxxxxx>
Subject: watchdog/hardlockup: change watchdog_nmi_enable() to void
Date: Fri, 19 May 2023 10:18:28 -0700
Nobody cares about the return value of watchdog_nmi_enable(), changing its
prototype to void.
Link: https://lkml.kernel.org/r/20230519101840.v5.4.Ic3a19b592eb1ac4c6f6eade44ffd943e8637b6e5@changeid
Signed-off-by: Pingfan Liu <kernelfans@xxxxxxxxx>
Signed-off-by: Lecopzer Chen <lecopzer.chen@xxxxxxxxxxxx>
Signed-off-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
Reviewed-by: Petr Mladek <pmladek@xxxxxxxx>
Acked-by: Nicholas Piggin <npiggin@xxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Chen-Yu Tsai <wens@xxxxxxxx>
Cc: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Cc: Colin Cross <ccross@xxxxxxxxxxx>
Cc: Daniel Thompson <daniel.thompson@xxxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Guenter Roeck <groeck@xxxxxxxxxxxx>
Cc: Ian Rogers <irogers@xxxxxxxxxx>
Cc: Marc Zyngier <maz@xxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Masayoshi Mizuma <msys.mizuma@xxxxxxxxx>
Cc: Matthias Kaehlcke <mka@xxxxxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc: "Ravi V. Shankar" <ravi.v.shankar@xxxxxxxxx>
Cc: Ricardo Neri <ricardo.neri@xxxxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
Cc: Stephen Boyd <swboyd@xxxxxxxxxxxx>
Cc: Sumit Garg <sumit.garg@xxxxxxxxxx>
Cc: Tzung-Bi Shih <tzungbi@xxxxxxxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/sparc/kernel/nmi.c | 8 +++-----
include/linux/nmi.h | 2 +-
kernel/watchdog.c | 3 +--
3 files changed, 5 insertions(+), 8 deletions(-)
--- a/arch/sparc/kernel/nmi.c~watchdog-hardlockup-change-watchdog_nmi_enable-to-void
+++ a/arch/sparc/kernel/nmi.c
@@ -282,11 +282,11 @@ __setup("nmi_watchdog=", setup_nmi_watch
* sparc specific NMI watchdog enable function.
* Enables watchdog if it is not enabled already.
*/
-int watchdog_nmi_enable(unsigned int cpu)
+void watchdog_nmi_enable(unsigned int cpu)
{
if (atomic_read(&nmi_active) == -1) {
pr_warn("NMI watchdog cannot be enabled or disabled\n");
- return -1;
+ return;
}
/*
@@ -295,11 +295,9 @@ int watchdog_nmi_enable(unsigned int cpu
* process first.
*/
if (!nmi_init_done)
- return 0;
+ return;
smp_call_function_single(cpu, start_nmi_watchdog, NULL, 1);
-
- return 0;
}
/*
* sparc specific NMI watchdog disable function.
--- a/include/linux/nmi.h~watchdog-hardlockup-change-watchdog_nmi_enable-to-void
+++ a/include/linux/nmi.h
@@ -119,7 +119,7 @@ static inline int hardlockup_detector_pe
void watchdog_nmi_stop(void);
void watchdog_nmi_start(void);
int watchdog_nmi_probe(void);
-int watchdog_nmi_enable(unsigned int cpu);
+void watchdog_nmi_enable(unsigned int cpu);
void watchdog_nmi_disable(unsigned int cpu);
void lockup_detector_reconfigure(void);
--- a/kernel/watchdog.c~watchdog-hardlockup-change-watchdog_nmi_enable-to-void
+++ a/kernel/watchdog.c
@@ -93,10 +93,9 @@ __setup("nmi_watchdog=", hardlockup_pani
* softlockup watchdog start and stop. The arch must select the
* SOFTLOCKUP_DETECTOR Kconfig.
*/
-int __weak watchdog_nmi_enable(unsigned int cpu)
+void __weak watchdog_nmi_enable(unsigned int cpu)
{
hardlockup_detector_perf_enable();
- return 0;
}
void __weak watchdog_nmi_disable(unsigned int cpu)
_
Patches currently in -mm which might be from lecopzer.chen@xxxxxxxxxxxx are
watchdog-remove-watchdog_default.patch
watchdog-hardlockup-change-watchdog_nmi_enable-to-void.patch
watchdog-perf-adapt-the-watchdog_perf-interface-for-async-model.patch
arm64-add-hw_nmi_get_sample_period-for-preparation-of-lockup-detector.patch
