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    Subject[PATCH 32/53] sched/headers: Split hotplug CPU interfaces out of <linux/sched.h> into <linux/sched/hotplug.h>
    Date
    Split the CPU hotplug scheduler APIs out of the common header.

    Cc: Linus Torvalds <torvalds@linux-foundation.org>
    Cc: Mike Galbraith <efault@gmx.de>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: linux-kernel@vger.kernel.org
    Signed-off-by: Ingo Molnar <mingo@kernel.org>
    ---
    include/linux/sched.h | 15 ---------------
    include/linux/sched/hotplug.h | 20 ++++++++++++++++++++
    2 files changed, 20 insertions(+), 15 deletions(-)

    diff --git a/include/linux/sched.h b/include/linux/sched.h
    index 1ffbf7b1ca06..cbee9d4398fa 100644
    --- a/include/linux/sched.h
    +++ b/include/linux/sched.h
    @@ -196,15 +196,6 @@ extern void cpu_init (void);
    extern void trap_init(void);
    extern void update_process_times(int user);
    extern void scheduler_tick(void);
    -extern int sched_cpu_starting(unsigned int cpu);
    -extern int sched_cpu_activate(unsigned int cpu);
    -extern int sched_cpu_deactivate(unsigned int cpu);
    -
    -#ifdef CONFIG_HOTPLUG_CPU
    -extern int sched_cpu_dying(unsigned int cpu);
    -#else
    -# define sched_cpu_dying NULL
    -#endif

    #define MAX_SCHEDULE_TIMEOUT LONG_MAX
    extern signed long schedule_timeout(signed long timeout);
    @@ -1494,12 +1485,6 @@ extern void sched_exec(void);
    #define sched_exec() {}
    #endif

    -#ifdef CONFIG_HOTPLUG_CPU
    -extern void idle_task_exit(void);
    -#else
    -static inline void idle_task_exit(void) {}
    -#endif
    -
    extern int yield_to(struct task_struct *p, bool preempt);
    extern void set_user_nice(struct task_struct *p, long nice);
    extern int task_prio(const struct task_struct *p);
    diff --git a/include/linux/sched/hotplug.h b/include/linux/sched/hotplug.h
    index 34670ed24894..c608d3c1ddb8 100644
    --- a/include/linux/sched/hotplug.h
    +++ b/include/linux/sched/hotplug.h
    @@ -3,4 +3,24 @@

    #include <linux/sched.h>

    +/*
    + * Scheduler interfaces for hotplug CPU support:
    + */
    +
    +extern int sched_cpu_starting(unsigned int cpu);
    +extern int sched_cpu_activate(unsigned int cpu);
    +extern int sched_cpu_deactivate(unsigned int cpu);
    +
    +#ifdef CONFIG_HOTPLUG_CPU
    +extern int sched_cpu_dying(unsigned int cpu);
    +#else
    +# define sched_cpu_dying NULL
    +#endif
    +
    +#ifdef CONFIG_HOTPLUG_CPU
    +extern void idle_task_exit(void);
    +#else
    +static inline void idle_task_exit(void) {}
    +#endif
    +
    #endif /* _LINUX_SCHED_HOTPLUG_H */
    --
    2.7.4
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