Commit eff4849f authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

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: default avatarThomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20220415091920.956045162@linutronix.de
parent 62c1256d

kernel/time/timekeeping.c

+1 −1
Original line number Diff line number Diff line
@@ -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);