rcu,ftrace: Fix ftrace recursion

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[ Upstream commit d2098b4440 ]

Kim reported that perf-ftrace made his box unhappy. It turns out that
commit:

  ff5c4f5cad ("rcu/tree: Mark the idle relevant functions noinstr")

removed one too many notrace qualifiers, probably due to there not being
a helpful comment.

This commit therefore reinstates the notrace and adds a comment to avoid
losing it again.

[ paulmck: Apply Steven Rostedt's feedback on the comment. ]
Fixes: ff5c4f5cad ("rcu/tree: Mark the idle relevant functions noinstr")
Reported-by: Kim Phillips <kim.phillips@amd.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

This commit is contained in:

Peter Zijlstra 2020-09-29 13:33:40 +02:00 • committed by Greg Kroah-Hartman

parent 4540e84bd8

commit 5cacd18c52

1 changed files with 4 additions and 1 deletions

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kernel/rcu/tree.c

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