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[ Upstream commit a741deac787f0d2d7068638c067db20af9e63752 ] The current torture-test sleeps are waiting for a duration, but there are situations where it is better to wait for an absolute time, for example, when ending a stutter interval. This commit therefore adds an hrtimer mode parameter to torture_hrtimeout_ns(). Why not also the other torture_hrtimeout_*() functions? The theory is that most absolute times will be in nanoseconds, especially not (say) jiffies. Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Frederic Weisbecker <frederic@kernel.org> Stable-dep-of: cca42bd8eb1b ("rcutorture: Fix stuttering races and other issues") Signed-off-by: Sasha Levin <sashal@kernel.org>