tick_check_oneshot_change

Name:Check, if a change happened, which makes oneshot possible.* Called cyclic from the hrtimer softirq (driven by the timer* softirq) allow_nohz signals, that we can switch into low-res nohz* mode, because high resolution timers are disabled (either compile

Proto:int tick_check_oneshot_change(int allow_nohz)

Type:int

Parameter:

Type	Parameter	Name
int	allow_nohz

1413

ts = this_cpu_ptr( & Per-CPU nohz control structure)

1415

If Not st_and_clear_bit - Clear a bit and return its old value*@nr: Bit to clear*@addr: Address to count from* This is an atomic fully-ordered operation (implied full memory barrier). Then Return 0

1418

If nohz_mode != NOHZ_MODE_INACTIVE Then Return 0

1421

If Not mekeeping_valid_for_hres - Check if timekeeping is suitable for hres || Not k_is_oneshot_available - check for a oneshot capable event device Then Return 0

1424

If Not allow_nohz Then Return 1

1427

tick_nohz_switch_to_nohz()

1428

Return 0

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