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timekeeping: Annotate ktime_get_boot_fast_ns() with data_race() 

Accessing timekeeper::offset_boot in ktime_get_boot_fast_ns() is an
intended data race as the reader side cannot synchronize with a writer and
there is no space in struct tk_read_base of the NMI safe timekeeper.

Mark it so.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20220415091920.956045162@linutronix.de
This commit is contained in:
Thomas Gleixner 2022-04-15 11:19:35 +02:00
parent 62c1256d54
commit eff4849f92
1 changed files with 1 additions and 1 deletions
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2
kernel/time/timekeeping.c
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@ -528,7 +528,7 @@ u64 notrace ktime_get_boot_fast_ns(void)
{
struct timekeeper *tk = &tk_core.timekeeper;
return (ktime_get_mono_fast_ns() + ktime_to_ns(tk->offs_boot));
return (ktime_get_mono_fast_ns() + ktime_to_ns(data_race(tk->offs_boot)));
}
EXPORT_SYMBOL_GPL(ktime_get_boot_fast_ns);