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rcu: Forgive slow expedited grace periods at boot time

Boot-time processing often loops in the kernel longer than one might
prefer, which can prevent expedited grace periods from completing in
a timely manner.  This in turn triggers a splat In nohz_full CPUs  One
could argue that long-looping code should be fixed, but on the other hand,
boot time is a bit special.

This commit therefore removes the splat.  Later commits will add the
splat back in, but in a way that removes false positives.

Reported-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney 2020-01-25 12:00:40 -08:00
parent 0e247386d9
commit 59d8cc6b2e

View File

@ -508,7 +508,6 @@ static void synchronize_rcu_expedited_wait(void)
tick_dep_set_cpu(cpu, TICK_DEP_BIT_RCU_EXP);
}
}
WARN_ON_ONCE(1);
}
for (;;) {