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authorFrederic Weisbecker <fweisbec@gmail.com>2014-02-24 16:40:00 +0100
committerJens Axboe <axboe@fb.com>2014-02-24 14:47:05 -0800
commite0a23b0628b10d25f2c178be6fcfc17c1ab49fda (patch)
treec412e03c0265362a0538e5db54f1641e2071dac1
parentd7877c03f1b62de06f9c00417952f39f56c1ab00 (diff)
downloadlinux-e0a23b0628b10d25f2c178be6fcfc17c1ab49fda.tar.bz2
watchdog: Simplify a little the IPI call
In order to remotely restart the watchdog hrtimer, update_timers() allocates a csd on the stack and pass it to __smp_call_function_single(). There is no partcular need, however, for a specific csd here. Lets simplify that a little by calling smp_call_function_single() which can already take care of the csd allocation by itself. Acked-by: Don Zickus <dzickus@redhat.com> Reviewed-by: Michal Hocko <mhocko@suse.cz> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Christoph Hellwig <hch@infradead.org> Cc: Don Zickus <dzickus@redhat.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jan Kara <jack@suse.cz> Cc: Jens Axboe <axboe@fb.com> Cc: Michal Hocko <mhocko@suse.cz> Cc: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Jens Axboe <axboe@fb.com>
-rw-r--r--kernel/watchdog.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index 4431610f049a..01c6f979486f 100644
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -505,7 +505,6 @@ static void restart_watchdog_hrtimer(void *info)
static void update_timers(int cpu)
{
- struct call_single_data data = {.func = restart_watchdog_hrtimer};
/*
* Make sure that perf event counter will adopt to a new
* sampling period. Updating the sampling period directly would
@@ -515,7 +514,7 @@ static void update_timers(int cpu)
* might be late already so we have to restart the timer as well.
*/
watchdog_nmi_disable(cpu);
- __smp_call_function_single(cpu, &data, 1);
+ smp_call_function_single(cpu, restart_watchdog_hrtimer, NULL, 1);
watchdog_nmi_enable(cpu);
}