vfs, fdtable: Prevent bounds-check bypass via speculative execution

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

diff --git a/include/linux/serio.h b/include/linux/serio.h
index be7dfb0..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)
 
@@ -79,19 +93,21 @@ void serio_reconnect(struct serio *serio);
 irqreturn_t serio_interrupt(struct serio *serio, unsigned char data, unsigned int flags);
 
 void __serio_register_port(struct serio *serio, struct module *owner);
-static inline void serio_register_port(struct serio *serio)
-{
-       __serio_register_port(serio, THIS_MODULE);
-}
+
+/* use a define to avoid include chaining to get THIS_MODULE */
+#define serio_register_port(serio) \
+       __serio_register_port(serio, THIS_MODULE)
 
 void serio_unregister_port(struct serio *serio);
 void serio_unregister_child_port(struct serio *serio);
 
-int __serio_register_driver(struct serio_driver *drv, struct module *owner, const char *mod_name);
-static inline int __must_check serio_register_driver(struct serio_driver *drv)
-{
-       return __serio_register_driver(drv, THIS_MODULE, KBUILD_MODNAME);
-}
+int __must_check __serio_register_driver(struct serio_driver *drv,
+                               struct module *owner, const char *mod_name);
+
+/* use a define to avoid include chaining to get THIS_MODULE & friends */
+#define serio_register_driver(drv) \
+       __serio_register_driver(drv, THIS_MODULE, KBUILD_MODNAME)
+
 void serio_unregister_driver(struct serio_driver *drv);
 
 static inline int serio_write(struct serio *serio, unsigned char data)