[PATCH 0/2] Introduce update_arch_nmi_watchdog for arch specific handlers

From: Babu Moger
Date: Thu Oct 06 2016 - 18:17:26 EST

During our testing we noticed that nmi watchdogs in sparc could not be disabled or
enabled dynamically using sysctl/proc interface. Sparc uses its own arch specific
nmi watchdogs. There is a sysctl and proc interface(proc/sys/kernel/nmi_watchdog)
to enable/disable nmi watchdogs. However, that is not working for sparc. There
is no interface to feed this parameter to arch specific nmi watchdogs.

These patches extend the same sysctl/proc interface to enable or disable
these arch specific nmi watchdogs dynamically. Introduced new function
update_arch_nmi_watchdog which can be implemented in arch specific handlers.
If you think there is a better way to do this. Please advice.

Tested on sparc. Compile tested on x86.

Babu Moger (2):
watchdog: Introduce update_arch_nmi_watchdog
sparc: Implement update_arch_nmi_watchdog

arch/sparc/kernel/nmi.c | 26 ++++++++++++++++++++++++++
include/linux/nmi.h | 1 +
kernel/watchdog.c | 16 +++++++++++++---
3 files changed, 40 insertions(+), 3 deletions(-)