tree 5ded19f41e8ceb49a55b2942fb0a5774a95126d1
parent e534165bbf6a04d001748c573c7d6a7bae3713a5
author Rik van Riel <riel@redhat.com> 1398579335 -0700
committer Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1400521924 -0700

rcu: Provide API to suppress stall warnings while sysrc runs

Some sysrq handlers can run for a long time, because they dump a lot
of data onto a serial console. Having RCU stall warnings pop up in
the middle of them only makes the problem worse.

This commit provides rcu_sysrq_start() and rcu_sysrq_end() APIs to
temporarily suppress RCU CPU stall warnings while a sysrq request is
handled.

Signed-off-by: Rik van Riel <riel@redhat.com>
[ paulmck: Fix TINY_RCU build error. ]
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>