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authorIngo Molnar <mingo@elte.hu>2010-01-13 11:58:37 +0300
committerIngo Molnar <mingo@elte.hu>2010-01-13 12:08:50 +0300
commit61405fea92c42d072d9b8bd189689f1502a838af (patch)
tree013ea3e7ed71f4114004d5852d40b6e89e128f76 /include/linux/rcutree.h
parent9c443dfdd31eddea6cbe6ee0ca469fbcc4e1dc3b (diff)
parent1703f2c321a8a531c393e137a82602e16c6061cb (diff)
downloadlinux-61405fea92c42d072d9b8bd189689f1502a838af.tar.xz
Merge branch 'perf/urgent' into perf/core
Merge reason: queue up dependent patch, update to -rc4 Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/rcutree.h')
-rw-r--r--include/linux/rcutree.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/rcutree.h b/include/linux/rcutree.h
index c93eee5911b0..8044b1b94333 100644
--- a/include/linux/rcutree.h
+++ b/include/linux/rcutree.h
@@ -45,6 +45,12 @@ extern void __rcu_read_unlock(void);
extern void synchronize_rcu(void);
extern void exit_rcu(void);
+/*
+ * Defined as macro as it is a very low level header
+ * included from areas that don't even know about current
+ */
+#define rcu_preempt_depth() (current->rcu_read_lock_nesting)
+
#else /* #ifdef CONFIG_TREE_PREEMPT_RCU */
static inline void __rcu_read_lock(void)
@@ -63,6 +69,11 @@ static inline void exit_rcu(void)
{
}
+static inline int rcu_preempt_depth(void)
+{
+ return 0;
+}
+
#endif /* #else #ifdef CONFIG_TREE_PREEMPT_RCU */
static inline void __rcu_read_lock_bh(void)