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Date: Tue, 6 Oct 2015 09:29:31 -0700 From: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com> To: linux-kernel@...r.kernel.org Cc: mingo@...nel.org, jiangshanlai@...il.com, dipankar@...ibm.com, akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com, josh@...htriplett.org, tglx@...utronix.de, peterz@...radead.org, rostedt@...dmis.org, dhowells@...hat.com, edumazet@...gle.com, dvhart@...ux.intel.com, fweisbec@...il.com, oleg@...hat.com, bobby.prani@...il.com, "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com> Subject: [PATCH tip/core/rcu 12/18] cpu: Remove try_get_online_cpus() Now that synchronize_sched_expedited() no longer uses it, there are no users of try_get_online_cpus() in mainline. This commit therefore removes it. Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@...radead.org> Cc: Thomas Gleixner <tglx@...utronix.de> --- include/linux/cpu.h | 2 -- kernel/cpu.c | 13 ------------- 2 files changed, 15 deletions(-) diff --git a/include/linux/cpu.h b/include/linux/cpu.h index 23c30bdcca86..d2ca8c38f9c4 100644 --- a/include/linux/cpu.h +++ b/include/linux/cpu.h @@ -228,7 +228,6 @@ extern struct bus_type cpu_subsys; extern void cpu_hotplug_begin(void); extern void cpu_hotplug_done(void); extern void get_online_cpus(void); -extern bool try_get_online_cpus(void); extern void put_online_cpus(void); extern void cpu_hotplug_disable(void); extern void cpu_hotplug_enable(void); @@ -246,7 +245,6 @@ int cpu_down(unsigned int cpu); static inline void cpu_hotplug_begin(void) {} static inline void cpu_hotplug_done(void) {} #define get_online_cpus() do { } while (0) -#define try_get_online_cpus() true #define put_online_cpus() do { } while (0) #define cpu_hotplug_disable() do { } while (0) #define cpu_hotplug_enable() do { } while (0) diff --git a/kernel/cpu.c b/kernel/cpu.c index 82cf9dff4295..14a9cdf8abe9 100644 --- a/kernel/cpu.c +++ b/kernel/cpu.c @@ -102,19 +102,6 @@ void get_online_cpus(void) } EXPORT_SYMBOL_GPL(get_online_cpus); -bool try_get_online_cpus(void) -{ - if (cpu_hotplug.active_writer == current) - return true; - if (!mutex_trylock(&cpu_hotplug.lock)) - return false; - cpuhp_lock_acquire_tryread(); - atomic_inc(&cpu_hotplug.refcount); - mutex_unlock(&cpu_hotplug.lock); - return true; -} -EXPORT_SYMBOL_GPL(try_get_online_cpus); - void put_online_cpus(void) { int refcount; -- 2.5.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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