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authorDmitry Torokhov <dtor_core@ameritech.net>2005-05-29 02:29:25 -0500
committerDmitry Torokhov <dtor_core@ameritech.net>2005-05-29 02:29:25 -0500
commit0fbf87caf70acec0c435233fbc39c7bd0aca3ca6 (patch)
tree65fa9bdde1f04a1359c3599d351199f834eb01ec /include/linux/input.h
parent58a007765bb5f16020e6000ecbdc5bcc6e54a147 (diff)
downloadop-kernel-dev-0fbf87caf70acec0c435233fbc39c7bd0aca3ca6.zip
op-kernel-dev-0fbf87caf70acec0c435233fbc39c7bd0aca3ca6.tar.gz
Input: add semaphore and user count to input_dev structure;
serialize open and close calls and ensure that device's open and close methods are only called when first user opens it or last user closes it. Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'include/linux/input.h')
-rw-r--r--include/linux/input.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/input.h b/include/linux/input.h
index 72731d7..43e8ece 100644
--- a/include/linux/input.h
+++ b/include/linux/input.h
@@ -859,6 +859,10 @@ struct input_dev {
int (*erase_effect)(struct input_dev *dev, int effect_id);
struct input_handle *grab;
+
+ struct semaphore sem; /* serializes open and close operations */
+ unsigned int users;
+
struct device *dev;
struct list_head h_list;
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