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powerpc/time: Remove unnecessary sanity check of decrementer expiration

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The clockevents code uses max_delta_ns to avoid calling a
clockevent with too large a value.

Remove the redundant version of this in the timer_interrupt
code.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Anton Blanchard 2011-11-23 20:07:20 +00:00 • committed by Benjamin Herrenschmidt
commit 68568add2c
1 changed files with 3 additions and 11 deletions
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14
arch/powerpc/kernel/time.c
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@ -572,7 +572,6 @@ void timer_interrupt(struct pt_regs * regs)
struct pt_regs *old_regs;
struct decrementer_clock *decrementer = &__get_cpu_var(decrementers);
struct clock_event_device *evt = &decrementer->event;
u64 now;
/* Ensure a positive value is written to the decrementer, or else
* some CPUs will continue to take decrementer exceptions.
@ -607,16 +606,9 @@ void timer_interrupt(struct pt_regs * regs)
get_lppaca()->int_dword.fields.decr_int = 0;
#endif
now = get_tb_or_rtc();
if (now >= decrementer->next_tb) {
decrementer->next_tb = ~(u64)0;
if (evt->event_handler)
evt->event_handler(evt);
} else {
now = decrementer->next_tb - now;
if (now <= DECREMENTER_MAX)
set_dec((int)now);
}
decrementer->next_tb = ~(u64)0;
if (evt->event_handler)
evt->event_handler(evt);
#ifdef CONFIG_PPC_ISERIES
if (firmware_has_feature(FW_FEATURE_ISERIES) && hvlpevent_is_pending())