x86: Use kick_all_cpus_sync() (85f7f656) · Commits · 戴 / test

arch/x86/Kconfig

+0 −3

Original line number	Diff line number	Diff line
		@@ -161,9 +161,6 @@ config RWSEM_GENERIC_SPINLOCK
		config RWSEM_XCHGADD_ALGORITHM
		def_bool X86_XADD

		config ARCH_HAS_CPU_IDLE_WAIT
		def_bool y

		config GENERIC_CALIBRATE_DELAY
		def_bool y

+0 −2

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		@@ -974,8 +974,6 @@ extern bool cpu_has_amd_erratum(const int *);
		#define cpu_has_amd_erratum(x) (false)
		#endif /* CONFIG_CPU_SUP_AMD */

		void cpu_idle_wait(void);

		extern unsigned long arch_align_stack(unsigned long sp);
		extern void free_init_pages(char *what, unsigned long begin, unsigned long end);

+1 −1

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		@@ -2401,7 +2401,7 @@ static void __exit apm_exit(void)
		* (pm_idle), Wait for all processors to update cached/local
		* copies of pm_idle before proceeding.
		*/
		cpu_idle_wait();
		kick_all_cpus_sync();
		}
		if (((apm_info.bios.flags & APM_BIOS_DISENGAGED) == 0)
		&& (apm_info.connection_version > 0x0100)) {

+0 −20

Original line number	Diff line number	Diff line
		@@ -525,26 +525,6 @@ void stop_this_cpu(void *dummy)
		}
		}

		static void do_nothing(void *unused)
		{
		}

		/*
		* cpu_idle_wait - Used to ensure that all the CPUs discard old value of
		* pm_idle and update to new pm_idle value. Required while changing pm_idle
		* handler on SMP systems.
		*
		* Caller must have changed pm_idle to the new value before the call. Old
		* pm_idle value will not be used by any CPU after the return of this function.
		*/
		void cpu_idle_wait(void)
		{
		smp_mb();
		/* kick all the CPUs so that they exit out of pm_idle */
		smp_call_function(do_nothing, NULL, 1);
		}
		EXPORT_SYMBOL_GPL(cpu_idle_wait);

		/* Default MONITOR/MWAIT with no hints, used for default C1 state */
		static void mwait_idle(void)
		{