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authorYangtao Li <tiny.windzz@gmail.com>2019-12-14 19:51:07 +0000
committerPeter Zijlstra <peterz@infradead.org>2019-12-17 13:32:51 +0100
commita5e37de90e67ac1072a9a44bd0cec9f5e98ded08 (patch)
tree3ab773284de64a263f4e7eb1f03d2d73ea324169 /kernel/stop_machine.c
parentd040e0734fb3dedfe24c3d94f5a32b4812eca610 (diff)
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stop_machine: remove try_stop_cpus helper
try_stop_cpus is not used after this: commit c190c3b16c0f ("rcu: Switch synchronize_sched_expedited() to stop_one_cpu()") So remove it. Signed-off-by: Yangtao Li <tiny.windzz@gmail.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20191214195107.26480-1-tiny.windzz@gmail.com
Diffstat (limited to 'kernel/stop_machine.c')
-rw-r--r--kernel/stop_machine.c30
1 files changed, 0 insertions, 30 deletions
diff --git a/kernel/stop_machine.c b/kernel/stop_machine.c
index 1fe34a9fabc2..5d68ec4c4015 100644
--- a/kernel/stop_machine.c
+++ b/kernel/stop_machine.c
@@ -453,36 +453,6 @@ int stop_cpus(const struct cpumask *cpumask, cpu_stop_fn_t fn, void *arg)
return ret;
}
-/**
- * try_stop_cpus - try to stop multiple cpus
- * @cpumask: cpus to stop
- * @fn: function to execute
- * @arg: argument to @fn
- *
- * Identical to stop_cpus() except that it fails with -EAGAIN if
- * someone else is already using the facility.
- *
- * CONTEXT:
- * Might sleep.
- *
- * RETURNS:
- * -EAGAIN if someone else is already stopping cpus, -ENOENT if
- * @fn(@arg) was not executed at all because all cpus in @cpumask were
- * offline; otherwise, 0 if all executions of @fn returned 0, any non
- * zero return value if any returned non zero.
- */
-int try_stop_cpus(const struct cpumask *cpumask, cpu_stop_fn_t fn, void *arg)
-{
- int ret;
-
- /* static works are used, process one request at a time */
- if (!mutex_trylock(&stop_cpus_mutex))
- return -EAGAIN;
- ret = __stop_cpus(cpumask, fn, arg);
- mutex_unlock(&stop_cpus_mutex);
- return ret;
-}
-
static int cpu_stop_should_run(unsigned int cpu)
{
struct cpu_stopper *stopper = &per_cpu(cpu_stopper, cpu);