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ANDROID: time/sched_clock: Export sched_clock_read_begin/retry()

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Export sched_clock_read_begin/retry() to provide sched clock data,
allowing the calculation of the offset between the arch timer counter
and the kernel sched clock.

Bug: 380370040
Change-Id: I8e753b6ac2dc1cc856e09285f95dd4e5a16078b5
Signed-off-by: Cong Zhang <quic_congzhan@quicinc.com>
This commit is contained in:
Cong Zhang
2024-11-22 14:36:30 +08:00
committed by Treehugger Robot
parent 18d8aca0a3
commit 458455e3e2
1 changed files with 2 additions and 0 deletions
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2
kernel/time/sched_clock.c
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@@ -75,11 +75,13 @@ notrace struct clock_read_data *sched_clock_read_begin(unsigned int *seq)
*seq = raw_read_seqcount_latch(&cd.seq);
return cd.read_data + (*seq & 1);
}
EXPORT_SYMBOL_GPL(sched_clock_read_begin);
notrace int sched_clock_read_retry(unsigned int seq)
{
return raw_read_seqcount_latch_retry(&cd.seq, seq);
}
EXPORT_SYMBOL_GPL(sched_clock_read_retry);
unsigned long long noinstr sched_clock_noinstr(void)
{