cpu/hotplug: Provide lockdep_assert_cpus_held() (ade3f680) · Commits · 戴 / test

Provide a stub function which can be used in places where existing get_online_cpus() calls are moved to call sites. This stub is going to be filled by the final conversion of the hotplug locking mechanism to a percpu rwsem. Signed-off-by:

Thomas Gleixner <tglx@linutronix.de> Tested-by:

Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by:

Ingo Molnar <mingo@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sebastian Siewior <bigeasy@linutronix.de> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/20170524081547.161282442@linutronix.de

include/linux/cpu.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -103,6 +103,7 @@ extern void cpus_write_lock(void);
		extern void cpus_write_unlock(void);
		extern void cpus_read_lock(void);
		extern void cpus_read_unlock(void);
		static inline void lockdep_assert_cpus_held(void) { }
		extern void cpu_hotplug_disable(void);
		extern void cpu_hotplug_enable(void);
		void clear_tasks_mm_cpumask(int cpu);
		@@ -114,6 +115,7 @@ static inline void cpus_write_lock(void) { }
		static inline void cpus_write_unlock(void) { }
		static inline void cpus_read_lock(void) { }
		static inline void cpus_read_unlock(void) { }
		static inline void lockdep_assert_cpus_held(void) { }
		static inline void cpu_hotplug_disable(void) { }
		static inline void cpu_hotplug_enable(void) { }
		#endif /* !CONFIG_HOTPLUG_CPU */

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