nohz: Rename a few state variables
Rename the full dynticks's cpumask and cpumask state variables
to some more exportable names.
These will be used later from global headers to optimize
the main full dynticks APIs in conjunction with static keys.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Li Zhong <zhong@linux.vnet.ibm.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Kevin Hilman <khilman@linaro.org>
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 91a2528..b28dee4 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -149,8 +149,8 @@
}
#ifdef CONFIG_NO_HZ_FULL
-static cpumask_var_t nohz_full_mask;
-bool have_nohz_full_mask;
+static cpumask_var_t tick_nohz_full_mask;
+bool tick_nohz_full_running;
static bool can_stop_full_tick(void)
{
@@ -183,7 +183,7 @@
* Don't allow the user to think they can get
* full NO_HZ with this machine.
*/
- WARN_ONCE(have_nohz_full_mask,
+ WARN_ONCE(tick_nohz_full_running,
"NO_HZ FULL will not work with unstable sched clock");
return false;
}
@@ -240,11 +240,11 @@
*/
void tick_nohz_full_kick_all(void)
{
- if (!have_nohz_full_mask)
+ if (!tick_nohz_full_running)
return;
preempt_disable();
- smp_call_function_many(nohz_full_mask,
+ smp_call_function_many(tick_nohz_full_mask,
nohz_full_kick_ipi, NULL, false);
preempt_enable();
}
@@ -272,10 +272,10 @@
int tick_nohz_full_cpu(int cpu)
{
- if (!have_nohz_full_mask)
+ if (!tick_nohz_full_running)
return 0;
- return cpumask_test_cpu(cpu, nohz_full_mask);
+ return cpumask_test_cpu(cpu, tick_nohz_full_mask);
}
/* Parse the boot-time nohz CPU list from the kernel parameters. */
@@ -283,18 +283,18 @@
{
int cpu;
- alloc_bootmem_cpumask_var(&nohz_full_mask);
- if (cpulist_parse(str, nohz_full_mask) < 0) {
+ alloc_bootmem_cpumask_var(&tick_nohz_full_mask);
+ if (cpulist_parse(str, tick_nohz_full_mask) < 0) {
pr_warning("NOHZ: Incorrect nohz_full cpumask\n");
return 1;
}
cpu = smp_processor_id();
- if (cpumask_test_cpu(cpu, nohz_full_mask)) {
+ if (cpumask_test_cpu(cpu, tick_nohz_full_mask)) {
pr_warning("NO_HZ: Clearing %d from nohz_full range for timekeeping\n", cpu);
- cpumask_clear_cpu(cpu, nohz_full_mask);
+ cpumask_clear_cpu(cpu, tick_nohz_full_mask);
}
- have_nohz_full_mask = true;
+ tick_nohz_full_running = true;
return 1;
}
@@ -312,7 +312,7 @@
* If we handle the timekeeping duty for full dynticks CPUs,
* we can't safely shutdown that CPU.
*/
- if (have_nohz_full_mask && tick_do_timer_cpu == cpu)
+ if (tick_nohz_full_running && tick_do_timer_cpu == cpu)
return NOTIFY_BAD;
break;
}
@@ -331,14 +331,14 @@
int err = -1;
#ifdef CONFIG_NO_HZ_FULL_ALL
- if (!alloc_cpumask_var(&nohz_full_mask, GFP_KERNEL)) {
+ if (!alloc_cpumask_var(&tick_nohz_full_mask, GFP_KERNEL)) {
pr_err("NO_HZ: Can't allocate full dynticks cpumask\n");
return err;
}
err = 0;
- cpumask_setall(nohz_full_mask);
- cpumask_clear_cpu(smp_processor_id(), nohz_full_mask);
- have_nohz_full_mask = true;
+ cpumask_setall(tick_nohz_full_mask);
+ cpumask_clear_cpu(smp_processor_id(), tick_nohz_full_mask);
+ tick_nohz_full_running = true;
#endif
return err;
}
@@ -347,20 +347,20 @@
{
int cpu;
- if (!have_nohz_full_mask) {
+ if (!tick_nohz_full_running) {
if (tick_nohz_init_all() < 0)
return;
}
- for_each_cpu(cpu, nohz_full_mask)
+ for_each_cpu(cpu, tick_nohz_full_mask)
context_tracking_cpu_set(cpu);
cpu_notifier(tick_nohz_cpu_down_callback, 0);
- cpulist_scnprintf(nohz_full_buf, sizeof(nohz_full_buf), nohz_full_mask);
+ cpulist_scnprintf(nohz_full_buf, sizeof(nohz_full_buf), tick_nohz_full_mask);
pr_info("NO_HZ: Full dynticks CPUs: %s.\n", nohz_full_buf);
}
#else
-#define have_nohz_full_mask (0)
+#define tick_nohz_full_running (0)
#endif
/*
@@ -738,7 +738,7 @@
return false;
}
- if (have_nohz_full_mask) {
+ if (tick_nohz_full_running) {
/*
* Keep the tick alive to guarantee timekeeping progression
* if there are full dynticks CPUs around