omap2+: add drm device

[pandora-kernel.git] / include / linux / sysctl.h

diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index 9a1ec10..703cfa3 100644 (file)
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -931,6 +931,7 @@ enum
 #ifdef __KERNEL__
 #include <linux/list.h>
 #include <linux/rcupdate.h>
+#include <linux/wait.h>
 
 /* For the /proc/sys support */
 struct ctl_table;
@@ -1011,6 +1012,26 @@ extern int proc_do_large_bitmap(struct ctl_table *, int,
  * cover common cases.
  */
 
+/* Support for userspace poll() to watch for changes */
+struct ctl_table_poll {
+       atomic_t event;
+       wait_queue_head_t wait;
+};
+
+static inline void *proc_sys_poll_event(struct ctl_table_poll *poll)
+{
+       return (void *)(unsigned long)atomic_read(&poll->event);
+}
+
+void proc_sys_poll_notify(struct ctl_table_poll *poll);
+
+#define __CTL_TABLE_POLL_INITIALIZER(name) {                           \
+       .event = ATOMIC_INIT(0),                                        \
+       .wait = __WAIT_QUEUE_HEAD_INITIALIZER(name.wait) }
+
+#define DEFINE_CTL_TABLE_POLL(name)                                    \
+       struct ctl_table_poll name = __CTL_TABLE_POLL_INITIALIZER(name)
+
 /* A sysctl table is an array of struct ctl_table: */
 struct ctl_table 
 {
@@ -1021,6 +1042,7 @@ struct ctl_table
        struct ctl_table *child;
        struct ctl_table *parent;       /* Automatically set */
        proc_handler *proc_handler;     /* Callback for text formatting */
+       struct ctl_table_poll *poll;
        void *extra1;
        void *extra2;
 };