sched/headers: Move the PREEMPT_COUNT defines from <linux/sched.h> to <linux/preempt.h>
These defines are not really part of the scheduler's driver API, but are related to the preempt count - so move them to <linux/preempt.h>. Acked-by: 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>
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@ -55,6 +55,27 @@
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/* We use the MSB mostly because its available */
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#define PREEMPT_NEED_RESCHED 0x80000000
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#define PREEMPT_DISABLED (PREEMPT_DISABLE_OFFSET + PREEMPT_ENABLED)
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/*
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* Disable preemption until the scheduler is running -- use an unconditional
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* value so that it also works on !PREEMPT_COUNT kernels.
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*
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* Reset by start_kernel()->sched_init()->init_idle()->init_idle_preempt_count().
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*/
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#define INIT_PREEMPT_COUNT PREEMPT_OFFSET
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/*
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* Initial preempt_count value; reflects the preempt_count schedule invariant
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* which states that during context switches:
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*
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* preempt_count() == 2*PREEMPT_DISABLE_OFFSET
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*
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* Note: PREEMPT_DISABLE_OFFSET is 0 for !PREEMPT_COUNT kernels.
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* Note: See finish_task_switch().
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*/
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#define FORK_PREEMPT_COUNT (2*PREEMPT_DISABLE_OFFSET + PREEMPT_ENABLED)
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/* preempt_count() and related functions, depends on PREEMPT_NEED_RESCHED */
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#include <asm/preempt.h>
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@ -265,27 +265,6 @@ struct task_cputime_atomic {
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.sum_exec_runtime = ATOMIC64_INIT(0), \
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}
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#define PREEMPT_DISABLED (PREEMPT_DISABLE_OFFSET + PREEMPT_ENABLED)
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/*
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* Disable preemption until the scheduler is running -- use an unconditional
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* value so that it also works on !PREEMPT_COUNT kernels.
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*
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* Reset by start_kernel()->sched_init()->init_idle()->init_idle_preempt_count().
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*/
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#define INIT_PREEMPT_COUNT PREEMPT_OFFSET
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/*
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* Initial preempt_count value; reflects the preempt_count schedule invariant
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* which states that during context switches:
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*
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* preempt_count() == 2*PREEMPT_DISABLE_OFFSET
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*
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* Note: PREEMPT_DISABLE_OFFSET is 0 for !PREEMPT_COUNT kernels.
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* Note: See finish_task_switch().
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*/
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#define FORK_PREEMPT_COUNT (2*PREEMPT_DISABLE_OFFSET + PREEMPT_ENABLED)
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/**
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* struct thread_group_cputimer - thread group interval timer counts
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* @cputime_atomic: atomic thread group interval timers.
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