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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2010-08-10 14:28:53 -0700
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2010-08-20 09:00:12 -0700
commit53d84e004d5e8c018be395c4330dc72fd60bd13e (patch)
tree6d5b265442ac42c7cc73147b0de0d029644e312b /include/linux/rcutiny.h
parent8cdd32a918350430483751feaae1c19cef816f69 (diff)
downloadop-kernel-dev-53d84e004d5e8c018be395c4330dc72fd60bd13e.zip
op-kernel-dev-53d84e004d5e8c018be395c4330dc72fd60bd13e.tar.gz
rcu: permit suppressing current grace period's CPU stall warnings
When using a kernel debugger, a long sojourn in the debugger can get you lots of RCU CPU stall warnings once you resume. This might not be helpful, especially if you are using the system console. This patch therefore allows RCU CPU stall warnings to be suppressed, but only for the duration of the current set of grace periods. This differs from Jason's original patch in that it adds support for tiny RCU and preemptible RCU, and uses a slightly different method for suppressing the RCU CPU stall warning messages. Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Tested-by: Jason Wessel <jason.wessel@windriver.com>
Diffstat (limited to 'include/linux/rcutiny.h')
-rw-r--r--include/linux/rcutiny.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/rcutiny.h b/include/linux/rcutiny.h
index 4cc5eba..3fa1797 100644
--- a/include/linux/rcutiny.h
+++ b/include/linux/rcutiny.h
@@ -178,6 +178,10 @@ static inline void rcu_sched_force_quiescent_state(void)
{
}
+static inline void rcu_cpu_stall_reset(void)
+{
+}
+
#ifdef CONFIG_DEBUG_LOCK_ALLOC
extern int rcu_scheduler_active __read_mostly;
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