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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2010-05-06 09:28:41 -0700
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2010-05-06 09:28:41 -0700
commitee84b8243b07c33a5c8aed42b4b2da60cb16d1d2 (patch)
treea5b3cad55179fe8340c6422deaf6e11120222ad1 /kernel/rcupdate.c
parentad4ba375373937817404fd92239ef4cadbded23b (diff)
downloadop-kernel-dev-ee84b8243b07c33a5c8aed42b4b2da60cb16d1d2.zip
op-kernel-dev-ee84b8243b07c33a5c8aed42b4b2da60cb16d1d2.tar.gz
rcu: create rcu_my_thread_group_empty() wrapper
Some RCU-lockdep splat repairs need to know whether they are running in a single-threaded process. Unfortunately, the thread_group_empty() primitive is defined in sched.h, and can induce #include hell. This commit therefore introduces a rcu_my_thread_group_empty() wrapper that is defined in rcupdate.c, thus avoiding the need to include sched.h everywhere. Signed-off-by: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcupdate.c')
-rw-r--r--kernel/rcupdate.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/kernel/rcupdate.c b/kernel/rcupdate.c
index 03a7ea1..49d808e 100644
--- a/kernel/rcupdate.c
+++ b/kernel/rcupdate.c
@@ -122,3 +122,14 @@ void wakeme_after_rcu(struct rcu_head *head)
rcu = container_of(head, struct rcu_synchronize, head);
complete(&rcu->completion);
}
+
+#ifdef CONFIG_PROVE_RCU
+/*
+ * wrapper function to avoid #include problems.
+ */
+int rcu_my_thread_group_empty(void)
+{
+ return thread_group_empty(current);
+}
+EXPORT_SYMBOL_GPL(rcu_my_thread_group_empty);
+#endif /* #ifdef CONFIG_PROVE_RCU */
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