diff options
author | Nicholas Piggin <npiggin@gmail.com> | 2017-07-13 00:35:43 +0300 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-13 02:26:02 +0300 |
commit | f2e0cff85ed111a3cf24d894c3fa11697dfae628 (patch) | |
tree | 7a913f2440703f986fb570f4ceca9eae9d9c4f04 | |
parent | 24bb44612c5f93a1dff1f7e71b7b7b109a988791 (diff) | |
download | linux-f2e0cff85ed111a3cf24d894c3fa11697dfae628.tar.xz |
kernel/watchdog: introduce arch_touch_nmi_watchdog()
For architectures that define HAVE_NMI_WATCHDOG, instead of having them
provide the complete touch_nmi_watchdog() function, just have them
provide arch_touch_nmi_watchdog().
This gives the generic code more flexibility in implementing this
function, and arch implementations don't miss out on touching the
softlockup watchdog or other generic details.
Link: http://lkml.kernel.org/r/20170616065715.18390-3-npiggin@gmail.com
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Don Zickus <dzickus@redhat.com>
Reviewed-by: Babu Moger <babu.moger@oracle.com>
Tested-by: Babu Moger <babu.moger@oracle.com> [sparc]
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r-- | arch/blackfin/include/asm/nmi.h | 2 | ||||
-rw-r--r-- | arch/blackfin/kernel/nmi.c | 2 | ||||
-rw-r--r-- | arch/mn10300/include/asm/nmi.h | 2 | ||||
-rw-r--r-- | arch/mn10300/kernel/mn10300-watchdog-low.S | 8 | ||||
-rw-r--r-- | arch/mn10300/kernel/mn10300-watchdog.c | 2 | ||||
-rw-r--r-- | arch/sparc/include/asm/nmi.h | 1 | ||||
-rw-r--r-- | arch/sparc/kernel/nmi.c | 6 | ||||
-rw-r--r-- | include/linux/nmi.h | 27 | ||||
-rw-r--r-- | kernel/watchdog_hld.c | 5 |
9 files changed, 31 insertions, 24 deletions
diff --git a/arch/blackfin/include/asm/nmi.h b/arch/blackfin/include/asm/nmi.h index b9caac4fcfd8..107d23705f46 100644 --- a/arch/blackfin/include/asm/nmi.h +++ b/arch/blackfin/include/asm/nmi.h @@ -9,4 +9,6 @@ #include <linux/nmi.h> +extern void arch_touch_nmi_watchdog(void); + #endif diff --git a/arch/blackfin/kernel/nmi.c b/arch/blackfin/kernel/nmi.c index 633c37083e87..1e714329fe8a 100644 --- a/arch/blackfin/kernel/nmi.c +++ b/arch/blackfin/kernel/nmi.c @@ -190,7 +190,7 @@ static int __init init_nmi_wdt(void) } device_initcall(init_nmi_wdt); -void touch_nmi_watchdog(void) +void arch_touch_nmi_watchdog(void) { atomic_set(&nmi_touched[smp_processor_id()], 1); } diff --git a/arch/mn10300/include/asm/nmi.h b/arch/mn10300/include/asm/nmi.h index f3671cbbc117..b05627597b1b 100644 --- a/arch/mn10300/include/asm/nmi.h +++ b/arch/mn10300/include/asm/nmi.h @@ -11,4 +11,6 @@ #ifndef _ASM_NMI_H #define _ASM_NMI_H +extern void arch_touch_nmi_watchdog(void); + #endif /* _ASM_NMI_H */ diff --git a/arch/mn10300/kernel/mn10300-watchdog-low.S b/arch/mn10300/kernel/mn10300-watchdog-low.S index f2f5c9cfaabd..34f8773de7d0 100644 --- a/arch/mn10300/kernel/mn10300-watchdog-low.S +++ b/arch/mn10300/kernel/mn10300-watchdog-low.S @@ -50,9 +50,9 @@ watchdog_handler: # we can't inline it) # ############################################################################### - .globl touch_nmi_watchdog - .type touch_nmi_watchdog,@function -touch_nmi_watchdog: + .globl arch_touch_nmi_watchdog + .type arch_touch_nmi_watchdog,@function +arch_touch_nmi_watchdog: clr d0 clr d1 mov watchdog_alert_counter, a0 @@ -63,4 +63,4 @@ touch_nmi_watchdog: lne ret [],0 - .size touch_nmi_watchdog,.-touch_nmi_watchdog + .size arch_touch_nmi_watchdog,.-arch_touch_nmi_watchdog diff --git a/arch/mn10300/kernel/mn10300-watchdog.c b/arch/mn10300/kernel/mn10300-watchdog.c index a2d8e6938d67..0d5641beadf5 100644 --- a/arch/mn10300/kernel/mn10300-watchdog.c +++ b/arch/mn10300/kernel/mn10300-watchdog.c @@ -31,7 +31,7 @@ static unsigned int watchdog; static unsigned int watchdog_hz = 1; unsigned int watchdog_alert_counter[NR_CPUS]; -EXPORT_SYMBOL(touch_nmi_watchdog); +EXPORT_SYMBOL(arch_touch_nmi_watchdog); /* * the best way to detect whether a CPU has a 'hard lockup' problem diff --git a/arch/sparc/include/asm/nmi.h b/arch/sparc/include/asm/nmi.h index 26ad2b2607c6..284eac3ffaf2 100644 --- a/arch/sparc/include/asm/nmi.h +++ b/arch/sparc/include/asm/nmi.h @@ -7,6 +7,7 @@ void nmi_adjust_hz(unsigned int new_hz); extern atomic_t nmi_active; +void arch_touch_nmi_watchdog(void); void start_nmi_watchdog(void *unused); void stop_nmi_watchdog(void *unused); diff --git a/arch/sparc/kernel/nmi.c b/arch/sparc/kernel/nmi.c index 95e73c63c99d..048ad783ea3f 100644 --- a/arch/sparc/kernel/nmi.c +++ b/arch/sparc/kernel/nmi.c @@ -51,7 +51,7 @@ static DEFINE_PER_CPU(unsigned int, last_irq_sum); static DEFINE_PER_CPU(long, alert_counter); static DEFINE_PER_CPU(int, nmi_touch); -void touch_nmi_watchdog(void) +void arch_touch_nmi_watchdog(void) { if (atomic_read(&nmi_active)) { int cpu; @@ -61,10 +61,8 @@ void touch_nmi_watchdog(void) per_cpu(nmi_touch, cpu) = 1; } } - - touch_softlockup_watchdog(); } -EXPORT_SYMBOL(touch_nmi_watchdog); +EXPORT_SYMBOL(arch_touch_nmi_watchdog); static void die_nmi(const char *str, struct pt_regs *regs, int do_panic) { diff --git a/include/linux/nmi.h b/include/linux/nmi.h index 5e2e57536d98..bd387ef8bccd 100644 --- a/include/linux/nmi.h +++ b/include/linux/nmi.h @@ -6,6 +6,9 @@ #include <linux/sched.h> #include <asm/irq.h> +#if defined(CONFIG_HAVE_NMI_WATCHDOG) +#include <asm/nmi.h> +#endif #ifdef CONFIG_LOCKUP_DETECTOR extern void touch_softlockup_watchdog_sched(void); @@ -58,6 +61,18 @@ static inline void reset_hung_task_detector(void) #define NMI_WATCHDOG_ENABLED (1 << NMI_WATCHDOG_ENABLED_BIT) #define SOFT_WATCHDOG_ENABLED (1 << SOFT_WATCHDOG_ENABLED_BIT) +#if defined(CONFIG_HARDLOCKUP_DETECTOR) +extern void hardlockup_detector_disable(void); +#else +static inline void hardlockup_detector_disable(void) {} +#endif + +#if defined(CONFIG_HARDLOCKUP_DETECTOR) || defined(CONFIG_HAVE_NMI_WATCHDOG) +extern void arch_touch_nmi_watchdog(void); +#else +static inline void arch_touch_nmi_watchdog(void) {} +#endif + /** * touch_nmi_watchdog - restart NMI watchdog timeout. * @@ -65,21 +80,11 @@ static inline void reset_hung_task_detector(void) * may be used to reset the timeout - for code which intentionally * disables interrupts for a long time. This call is stateless. */ -#if defined(CONFIG_HAVE_NMI_WATCHDOG) || defined(CONFIG_HARDLOCKUP_DETECTOR) -#include <asm/nmi.h> -extern void touch_nmi_watchdog(void); -#else static inline void touch_nmi_watchdog(void) { + arch_touch_nmi_watchdog(); touch_softlockup_watchdog(); } -#endif - -#if defined(CONFIG_HARDLOCKUP_DETECTOR) -extern void hardlockup_detector_disable(void); -#else -static inline void hardlockup_detector_disable(void) {} -#endif /* * Create trigger_all_cpu_backtrace() out of the arch-provided diff --git a/kernel/watchdog_hld.c b/kernel/watchdog_hld.c index 54a427d1f344..90d688df6ce1 100644 --- a/kernel/watchdog_hld.c +++ b/kernel/watchdog_hld.c @@ -56,7 +56,7 @@ static int __init hardlockup_panic_setup(char *str) } __setup("nmi_watchdog=", hardlockup_panic_setup); -void touch_nmi_watchdog(void) +void arch_touch_nmi_watchdog(void) { /* * Using __raw here because some code paths have @@ -66,9 +66,8 @@ void touch_nmi_watchdog(void) * going off. */ raw_cpu_write(watchdog_nmi_touch, true); - touch_softlockup_watchdog(); } -EXPORT_SYMBOL(touch_nmi_watchdog); +EXPORT_SYMBOL(arch_touch_nmi_watchdog); static struct perf_event_attr wd_hw_attr = { .type = PERF_TYPE_HARDWARE, |