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    Subject[tip: sched/core] sched: Fix missing prototype warnings
    The following commit has been merged into the sched/core branch of tip:

    Commit-ID: d664e399128bd78b905ff480917e2c2d4949e101
    Gitweb: https://git.kernel.org/tip/d664e399128bd78b905ff480917e2c2d4949e101
    Author: Thomas Gleixner <tglx@linutronix.de>
    AuthorDate: Wed, 13 Apr 2022 15:31:02 +02:00
    Committer: Thomas Gleixner <tglx@linutronix.de>
    CommitterDate: Sun, 01 May 2022 10:03:43 +02:00

    sched: Fix missing prototype warnings

    A W=1 build emits more than a dozen missing prototype warnings related to
    scheduler and scheduler specific includes.

    Reported-by: kernel test robot <lkp@intel.com>
    Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
    Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
    Link: https://lore.kernel.org/r/20220413133024.249118058@linutronix.de
    ---
    include/linux/sched.h | 2 ++
    kernel/sched/build_policy.c | 2 ++
    kernel/sched/build_utility.c | 1 +
    kernel/sched/core.c | 3 +++
    kernel/sched/deadline.c | 2 --
    kernel/sched/fair.c | 1 +
    kernel/sched/sched.h | 8 ++------
    kernel/sched/smp.h | 6 ++++++
    kernel/stop_machine.c | 2 --
    9 files changed, 17 insertions(+), 10 deletions(-)

    diff --git a/include/linux/sched.h b/include/linux/sched.h
    index fc74ea2..a27316f 100644
    --- a/include/linux/sched.h
    +++ b/include/linux/sched.h
    @@ -2388,4 +2388,6 @@ static inline void sched_core_free(struct task_struct *tsk) { }
    static inline void sched_core_fork(struct task_struct *p) { }
    #endif

    +extern void sched_set_stop_task(int cpu, struct task_struct *stop);
    +
    #endif
    diff --git a/kernel/sched/build_policy.c b/kernel/sched/build_policy.c
    index e0104b4..d9dc9ab 100644
    --- a/kernel/sched/build_policy.c
    +++ b/kernel/sched/build_policy.c
    @@ -15,6 +15,7 @@
    /* Headers: */
    #include <linux/sched/clock.h>
    #include <linux/sched/cputime.h>
    +#include <linux/sched/hotplug.h>
    #include <linux/sched/posix-timers.h>
    #include <linux/sched/rt.h>

    @@ -31,6 +32,7 @@
    #include <uapi/linux/sched/types.h>

    #include "sched.h"
    +#include "smp.h"

    #include "autogroup.h"
    #include "stats.h"
    diff --git a/kernel/sched/build_utility.c b/kernel/sched/build_utility.c
    index eec0849..99bdd96 100644
    --- a/kernel/sched/build_utility.c
    +++ b/kernel/sched/build_utility.c
    @@ -14,6 +14,7 @@
    #include <linux/sched/debug.h>
    #include <linux/sched/isolation.h>
    #include <linux/sched/loadavg.h>
    +#include <linux/sched/nohz.h>
    #include <linux/sched/mm.h>
    #include <linux/sched/rseq_api.h>
    #include <linux/sched/task_stack.h>
    diff --git a/kernel/sched/core.c b/kernel/sched/core.c
    index 068c088..e644578 100644
    --- a/kernel/sched/core.c
    +++ b/kernel/sched/core.c
    @@ -26,7 +26,10 @@
    #include <linux/topology.h>
    #include <linux/sched/clock.h>
    #include <linux/sched/cond_resched.h>
    +#include <linux/sched/cputime.h>
    #include <linux/sched/debug.h>
    +#include <linux/sched/hotplug.h>
    +#include <linux/sched/init.h>
    #include <linux/sched/isolation.h>
    #include <linux/sched/loadavg.h>
    #include <linux/sched/mm.h>
    diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
    index fb4255a..6ae4236 100644
    --- a/kernel/sched/deadline.c
    +++ b/kernel/sched/deadline.c
    @@ -1220,8 +1220,6 @@ int dl_runtime_exceeded(struct sched_dl_entity *dl_se)
    return (dl_se->runtime <= 0);
    }

    -extern bool sched_rt_bandwidth_account(struct rt_rq *rt_rq);
    -
    /*
    * This function implements the GRUB accounting rule:
    * according to the GRUB reclaiming algorithm, the runtime is
    diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
    index 6ca054b..bc9f6e9 100644
    --- a/kernel/sched/fair.c
    +++ b/kernel/sched/fair.c
    @@ -36,6 +36,7 @@
    #include <linux/sched/cond_resched.h>
    #include <linux/sched/cputime.h>
    #include <linux/sched/isolation.h>
    +#include <linux/sched/nohz.h>

    #include <linux/cpuidle.h>
    #include <linux/interrupt.h>
    diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
    index 762be73..4784898 100644
    --- a/kernel/sched/sched.h
    +++ b/kernel/sched/sched.h
    @@ -1833,12 +1833,7 @@ static inline void dirty_sched_domain_sysctl(int cpu)
    #endif

    extern int sched_update_scaling(void);
    -
    -extern void flush_smp_call_function_from_idle(void);
    -
    -#else /* !CONFIG_SMP: */
    -static inline void flush_smp_call_function_from_idle(void) { }
    -#endif
    +#endif /* CONFIG_SMP */

    #include "stats.h"

    @@ -2315,6 +2310,7 @@ extern void resched_cpu(int cpu);

    extern struct rt_bandwidth def_rt_bandwidth;
    extern void init_rt_bandwidth(struct rt_bandwidth *rt_b, u64 period, u64 runtime);
    +extern bool sched_rt_bandwidth_account(struct rt_rq *rt_rq);

    extern void init_dl_bandwidth(struct dl_bandwidth *dl_b, u64 period, u64 runtime);
    extern void init_dl_task_timer(struct sched_dl_entity *dl_se);
    diff --git a/kernel/sched/smp.h b/kernel/sched/smp.h
    index 9620e32..5719bf9 100644
    --- a/kernel/sched/smp.h
    +++ b/kernel/sched/smp.h
    @@ -7,3 +7,9 @@
    extern void sched_ttwu_pending(void *arg);

    extern void send_call_function_single_ipi(int cpu);
    +
    +#ifdef CONFIG_SMP
    +extern void flush_smp_call_function_from_idle(void);
    +#else
    +static inline void flush_smp_call_function_from_idle(void) { }
    +#endif
    diff --git a/kernel/stop_machine.c b/kernel/stop_machine.c
    index cbc3027..6da7b91 100644
    --- a/kernel/stop_machine.c
    +++ b/kernel/stop_machine.c
    @@ -535,8 +535,6 @@ void stop_machine_park(int cpu)
    kthread_park(stopper->thread);
    }

    -extern void sched_set_stop_task(int cpu, struct task_struct *stop);
    -
    static void cpu_stop_create(unsigned int cpu)
    {
    sched_set_stop_task(cpu, per_cpu(cpu_stopper.thread, cpu));
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