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authorMark Brown <broonie@linaro.org>2013-06-14 10:16:06 +0100
committerMark Brown <broonie@linaro.org>2013-06-14 10:16:06 +0100
commit384b8345589cbbb18a99ce1b112da90c58c802e8 (patch)
tree51fee39fa19adad6b24fb90123e7a0ca3159c9c5 /include/linux/rcupdate.h
parent9c24b1672283644adf871244771ebf387dd73f90 (diff)
parent2e7ee15ced914e109a1a5b6dfcd463d846a13bd5 (diff)
Merge branch 'fix/wm8962' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into asoc-wm8962
Conflicts: sound/soc/codecs/wm8962.c
Diffstat (limited to 'include/linux/rcupdate.h')
-rw-r--r--include/linux/rcupdate.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index 4ccd68e49b0..ddcc7826d90 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -640,6 +640,15 @@ static inline void rcu_preempt_sleep_check(void)
#define rcu_dereference_raw(p) rcu_dereference_check(p, 1) /*@@@ needed? @@@*/
+/*
+ * The tracing infrastructure traces RCU (we want that), but unfortunately
+ * some of the RCU checks causes tracing to lock up the system.
+ *
+ * The tracing version of rcu_dereference_raw() must not call
+ * rcu_read_lock_held().
+ */
+#define rcu_dereference_raw_notrace(p) __rcu_dereference_check((p), 1, __rcu)
+
/**
* rcu_access_index() - fetch RCU index with no dereferencing
* @p: The index to read