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authorMathieu Desnoyers <mathieu.desnoyers@efficios.com>2011-03-16 19:05:29 -0400
committerMathieu Desnoyers <mathieu.desnoyers@polymtl.ca>2011-03-16 19:05:29 -0400
commit9cf695f37cd70bbcb26cf14693267955b74ae97e (patch)
treeeace13a9da80722698a4536c17941915921dbe8b /kernel
parente6ee1522ebee41af3ea24f20432210aa7b732b81 (diff)
downloadlinux-linaro-android-9cf695f37cd70bbcb26cf14693267955b74ae97e.tar.gz
idle-notifier-standardize
Diffstat (limited to 'kernel')
-rw-r--r--kernel/notifier.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/kernel/notifier.c b/kernel/notifier.c
index 88453a7e56b..e8481427153 100644
--- a/kernel/notifier.c
+++ b/kernel/notifier.c
@@ -5,6 +5,7 @@
#include <linux/rcupdate.h>
#include <linux/vmalloc.h>
#include <linux/reboot.h>
+#include <linux/idle.h>
/*
* Notifier list for kernel code which wants to be called
@@ -584,3 +585,27 @@ int unregister_die_notifier(struct notifier_block *nb)
return atomic_notifier_chain_unregister(&die_chain, nb);
}
EXPORT_SYMBOL_GPL(unregister_die_notifier);
+
+static ATOMIC_NOTIFIER_HEAD(idle_notifier);
+
+/*
+ * Trace last event before calling notifiers. Notifiers flush data from buffers
+ * before going to idle.
+ */
+int notrace notify_idle(enum idle_val val)
+{
+ return atomic_notifier_call_chain(&idle_notifier, val, NULL);
+}
+EXPORT_SYMBOL_GPL(notify_idle);
+
+void register_idle_notifier(struct notifier_block *n)
+{
+ atomic_notifier_chain_register(&idle_notifier, n);
+}
+EXPORT_SYMBOL_GPL(register_idle_notifier);
+
+void unregister_idle_notifier(struct notifier_block *n)
+{
+ atomic_notifier_chain_unregister(&idle_notifier, n);
+}
+EXPORT_SYMBOL_GPL(unregister_idle_notifier);