pandora: defconfig: update

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

diff --git a/include/linux/serio.h b/include/linux/serio.h
index ca82861..34b403a 100644 (file)
--- a/include/linux/serio.h
+++ b/include/linux/serio.h
@@ -33,7 +33,8 @@ struct serio {
 
        struct serio_device_id id;
 
-       spinlock_t lock;                /* protects critical sections from port's interrupt handler */
+       /* Protects critical sections from port's interrupt handler */
+       spinlock_t lock;
 
        int (*write)(struct serio *, unsigned char);
        int (*open)(struct serio *);
@@ -42,16 +43,29 @@ struct serio {
        void (*stop)(struct serio *);
 
        struct serio *parent;
-       struct list_head child_node;    /* Entry in parent->children list */
+       /* Entry in parent->children list */
+       struct list_head child_node;
        struct list_head children;
-       unsigned int depth;             /* level of nesting in serio hierarchy */
+       /* Level of nesting in serio hierarchy */
+       unsigned int depth;
 
-       struct serio_driver *drv;       /* accessed from interrupt, must be protected by serio->lock and serio->sem */
-       struct mutex drv_mutex;         /* protects serio->drv so attributes can pin driver */
+       /*
+        * serio->drv is accessed from interrupt handlers; when modifying
+        * caller should acquire serio->drv_mutex and serio->lock.
+        */
+       struct serio_driver *drv;
+       /* Protects serio->drv so attributes can pin current driver */
+       struct mutex drv_mutex;
 
        struct device dev;
 
        struct list_head node;
+
+       /*
+        * For use by PS/2 layer when several ports share hardware and
+        * may get indigestion when exposed to concurrent access (i8042).
+        */
+       struct mutex *ps2_cmd_mutex;
 };
 #define to_serio_port(d)       container_of(d, struct serio, dev)