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cpu/hotplug: Add lockdep_is_cpus_held()

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This commit adds a lockdep_is_cpus_held() function to verify that the
proper locks are held and that various operations are running in the
correct context.

Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Cc: Paul E. McKenney <paulmck@kernel.org>
Cc: Josh Triplett <josh@joshtriplett.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Lai Jiangshan <jiangshanlai@gmail.com>
Cc: Joel Fernandes <joel@joelfernandes.org>
Cc: Neeraj Upadhyay <neeraju@codeaurora.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Frederic Weisbecker
2020-11-11 23:53:13 +01:00
committed by Paul E. McKenney
parent 634954c2db
commit 43759fe5a1
2 changed files with 9 additions and 0 deletions
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2
include/linux/cpu.h
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@@ -111,6 +111,8 @@ static inline void cpu_maps_update_done(void)
#endif /* CONFIG_SMP */
extern struct bus_type cpu_subsys;
extern int lockdep_is_cpus_held(void);
#ifdef CONFIG_HOTPLUG_CPU
extern void cpus_write_lock(void);
extern void cpus_write_unlock(void);