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cpuidle: Make latency notifier no-op

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Change-Id: I5c949e220828cf87c5d6945c70263771f5f3a8f7
Signed-off-by: Alexander Winkowski <dereference23@outlook.com>
Signed-off-by: Richard Raya <rdxzv.dev@gmail.com>
This commit is contained in:
Alexander Winkowski 2022-04-17 15:10:35 +00:00 committed by Richard Raya
parent 18c2247b1a
commit 56d86cd07c
3 changed files with 0 additions and 36 deletions
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25
drivers/cpuidle/cpuidle.c
View File

@ -37,24 +37,6 @@ static int enabled_devices;
static int off __read_mostly;
static int initialized __read_mostly;
#ifdef CONFIG_SMP
static atomic_t idled = ATOMIC_INIT(0);
#if NR_CPUS > 32
#error idled CPU mask not big enough for NR_CPUS
#endif
void cpuidle_set_idle_cpu(unsigned int cpu)
{
atomic_or(BIT(cpu), &idled);
}
void cpuidle_clear_idle_cpu(unsigned int cpu)
{
atomic_andnot(BIT(cpu), &idled);
}
#endif
int cpuidle_disabled(void)
{
return off;
@ -668,13 +650,6 @@ EXPORT_SYMBOL_GPL(cpuidle_register);
static int cpuidle_latency_notify(struct notifier_block *b,
unsigned long l, void *v)
{
unsigned long cpus = atomic_read(&idled) & *cpumask_bits(to_cpumask(v));
/* Use READ_ONCE to get the isolated mask outside cpu_add_remove_lock */
cpus &= ~READ_ONCE(*cpumask_bits(cpu_isolated_mask));
if (cpus)
arch_send_wakeup_ipi_mask(to_cpumask(&cpus));
return NOTIFY_OK;
}

3
drivers/cpuidle/lpm-levels.c
View File

@ -499,10 +499,7 @@ static int lpm_cpuidle_select(struct cpuidle_driver *drv,
static int lpm_cpuidle_enter(struct cpuidle_device *dev,
struct cpuidle_driver *drv, int idx)
{
cpuidle_set_idle_cpu(dev->cpu);
wfi();
cpuidle_clear_idle_cpu(dev->cpu);
return idx;
}

8
include/linux/cpuidle.h
View File

@ -277,12 +277,4 @@ static inline int cpuidle_register_governor(struct cpuidle_governor *gov)
__ret ? -1 : idx; \
})
#ifdef CONFIG_SMP
void cpuidle_set_idle_cpu(unsigned int cpu);
void cpuidle_clear_idle_cpu(unsigned int cpu);
#else
static inline void cpuidle_set_idle_cpu(unsigned int cpu) { }
static inline void cpuidle_clear_idle_cpu(unsigned int cpu) { }
#endif
#endif /* _LINUX_CPUIDLE_H */