| Message ID | 20230504151100.v4.3.Ic3a19b592eb1ac4c6f6eade44ffd943e8637b6e5@changeid (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | watchdog/hardlockup: Add the buddy hardlockup detector | expand |
On Fri May 5, 2023 at 8:13 AM AEST, Douglas Anderson wrote: > From: Lecopzer Chen <lecopzer.chen@mediatek.com> > > Nobody cares about the return value of watchdog_nmi_enable(), > changing its prototype to void. > Acked-by: Nicholas Piggin <npiggin@gmail.com> > Signed-off-by: Pingfan Liu <kernelfans@gmail.com> > Signed-off-by: Lecopzer Chen <lecopzer.chen@mediatek.com> > Reviewed-by: Petr Mladek <pmladek@suse.com> > Signed-off-by: Douglas Anderson <dianders@chromium.org> > --- > I yanked this patch from the mailing lists [1] into my series just to > make it easier to avoid conflicts between my series and the one adding > the arm64 perf hardlockup detector, in case someone wanted to test > them both together. This is a nice cleanup and could land together > with the rest of my series if that makes sense. > > I changed the patch prefix to match others in my series. > > [1] https://lore.kernel.org/r/20220903093415.15850-3-lecopzer.chen@mediatek.com/ > > Changes in v4: > - Pulled ("change watchdog_nmi_enable() to void") into my series for v4. > > arch/sparc/kernel/nmi.c | 8 +++----- > include/linux/nmi.h | 2 +- > kernel/watchdog.c | 3 +-- > 3 files changed, 5 insertions(+), 8 deletions(-) > > diff --git a/arch/sparc/kernel/nmi.c b/arch/sparc/kernel/nmi.c > index 060fff95a305..5dcf31f7e81f 100644 > --- a/arch/sparc/kernel/nmi.c > +++ b/arch/sparc/kernel/nmi.c > @@ -282,11 +282,11 @@ __setup("nmi_watchdog=", setup_nmi_watchdog); > * 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. > diff --git a/include/linux/nmi.h b/include/linux/nmi.h > index 771d77b62bc1..454fe99c4874 100644 > --- a/include/linux/nmi.h > +++ b/include/linux/nmi.h > @@ -119,7 +119,7 @@ static inline int hardlockup_detector_perf_init(void) { return 0; } > 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); > diff --git a/kernel/watchdog.c b/kernel/watchdog.c > index 582d572e1379..c705a18b26bf 100644 > --- a/kernel/watchdog.c > +++ b/kernel/watchdog.c > @@ -93,10 +93,9 @@ __setup("nmi_watchdog=", hardlockup_panic_setup); > * 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) > -- > 2.40.1.521.gf1e218fcd8-goog
diff --git a/arch/sparc/kernel/nmi.c b/arch/sparc/kernel/nmi.c index 060fff95a305..5dcf31f7e81f 100644 --- a/arch/sparc/kernel/nmi.c +++ b/arch/sparc/kernel/nmi.c @@ -282,11 +282,11 @@ __setup("nmi_watchdog=", setup_nmi_watchdog); * 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. diff --git a/include/linux/nmi.h b/include/linux/nmi.h index 771d77b62bc1..454fe99c4874 100644 --- a/include/linux/nmi.h +++ b/include/linux/nmi.h @@ -119,7 +119,7 @@ static inline int hardlockup_detector_perf_init(void) { return 0; } 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); diff --git a/kernel/watchdog.c b/kernel/watchdog.c index 582d572e1379..c705a18b26bf 100644 --- a/kernel/watchdog.c +++ b/kernel/watchdog.c @@ -93,10 +93,9 @@ __setup("nmi_watchdog=", hardlockup_panic_setup); * 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)