doc: rcu: Suspicious RCU usage is a warning

Suspicious RCU usage messages are reported as warnings.

Fixes: a5dd63efda ("lockdep: Use "WARNING" tag on lockdep splats")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Paul E. McKenney <paulmck@linux.ibm.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Geert Uytterhoeven 2019-02-28 11:59:32 +01:00 • committed by Jonathan Corbet
commit 6cd43851f8