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timekeeping: Consolidate fast timekeeper 

Provide a inline function which replaces the copy & pasta.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220415091921.072296632@linutronix.de
This commit is contained in:
Thomas Gleixner 2022-04-15 11:19:38 +02:00
parent eff4849f92
commit 90be8d6c1f
1 changed files with 10 additions and 10 deletions
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20
kernel/time/timekeeping.c
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@ -429,6 +429,14 @@ static void update_fast_timekeeper(const struct tk_read_base *tkr,
memcpy(base + 1, base, sizeof(*base));
}
static __always_inline u64 fast_tk_get_delta_ns(struct tk_read_base *tkr)
{
u64 delta, cycles = tk_clock_read(tkr);
delta = clocksource_delta(cycles, tkr->cycle_last, tkr->mask);
return timekeeping_delta_to_ns(tkr, delta);
}
static __always_inline u64 __ktime_get_fast_ns(struct tk_fast *tkf)
{
struct tk_read_base *tkr;
@ -439,12 +447,7 @@ static __always_inline u64 __ktime_get_fast_ns(struct tk_fast *tkf)
seq = raw_read_seqcount_latch(&tkf->seq);
tkr = tkf->base + (seq & 0x01);
now = ktime_to_ns(tkr->base);
now += timekeeping_delta_to_ns(tkr,
clocksource_delta(
tk_clock_read(tkr),
tkr->cycle_last,
tkr->mask));
now += fast_tk_get_delta_ns(tkr);
} while (read_seqcount_latch_retry(&tkf->seq, seq));
return now;
@ -560,10 +563,7 @@ static __always_inline u64 __ktime_get_real_fast(struct tk_fast *tkf, u64 *mono)
tkr = tkf->base + (seq & 0x01);
basem = ktime_to_ns(tkr->base);
baser = ktime_to_ns(tkr->base_real);
delta = timekeeping_delta_to_ns(tkr,
clocksource_delta(tk_clock_read(tkr),
tkr->cycle_last, tkr->mask));
delta = fast_tk_get_delta_ns(tkr);
} while (read_seqcount_latch_retry(&tkf->seq, seq));
if (mono)