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x86/idle: Remove is_idle flag
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Upon removal of the idle_notifier, all accesses to the "is_idle" flag serve
no purpose.

Signed-off-by: Len Brown <len.brown@intel.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: http://lkml.kernel.org/r/e4a24197cf9c227fcd1ca2df09999eaec9052f49.1479449716.git.len.brown@intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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Len Brown authored and Thomas Gleixner committed Nov 18, 2016
1 parent 8e7a7ee commit f08b5fe
Showing 1 changed file with 0 additions and 7 deletions.
7 changes: 0 additions & 7 deletions arch/x86/kernel/process.c
Original file line number Diff line number Diff line change
Expand Up @@ -65,10 +65,6 @@ __visible DEFINE_PER_CPU_SHARED_ALIGNED(struct tss_struct, cpu_tss) = {
};
EXPORT_PER_CPU_SYMBOL(cpu_tss);

#ifdef CONFIG_X86_64
static DEFINE_PER_CPU(unsigned char, is_idle);
#endif

/*
* this gets called so that we can store lazy state into memory and copy the
* current task into the new thread.
Expand Down Expand Up @@ -241,13 +237,10 @@ static inline void play_dead(void)
#ifdef CONFIG_X86_64
void enter_idle(void)
{
this_cpu_write(is_idle, 1);
}

static void __exit_idle(void)
{
if (x86_test_and_clear_bit_percpu(0, is_idle) == 0)
return;
}

/* Called from interrupts to signify idle end */
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