Merge 'Linux v3.0' into Litmus

Some notes:
* Litmus^RT scheduling class is the topmost scheduling class
  (above stop_sched_class).
* scheduler_ipi() function (e.g., in smp_reschedule_interrupt())
  may increase IPI latencies.
* Added path into schedule() to quickly re-evaluate scheduling
  decision without becoming preemptive again. This used to be
  a standard path before the removal of BKL.

Conflicts:
	Makefile
	arch/arm/kernel/calls.S
	arch/arm/kernel/smp.c
	arch/x86/include/asm/unistd_32.h
	arch/x86/kernel/smp.c
	arch/x86/kernel/syscall_table_32.S
	include/linux/hrtimer.h
	kernel/printk.c
	kernel/sched.c
	kernel/sched_fair.c

1 files changed, 22 insertions, 4 deletions

diff --git a/include/linux/usb/otg.h b/include/linux/usb/otg.h
index 545cba73ccaf..d87f44f5b04e 100644
--- a/include/linux/usb/otg.h
+++ b/include/linux/usb/otg.h
@@ -66,6 +66,7 @@ struct otg_transceiver {
 
         u8                      default_a;
         enum usb_otg_state      state;
+        enum usb_xceiv_events   last_event;
 
         struct usb_bus          *host;
         struct usb_gadget       *gadget;
@@ -74,7 +75,7 @@ struct otg_transceiver {
         void __iomem                    *io_priv;
 
         /* for notification of usb_xceiv_events */
-        struct blocking_notifier_head   notifier;
+        struct atomic_notifier_head     notifier;
 
         /* to pass extra port status to the root hub */
         u16                     port_status;
@@ -116,7 +117,7 @@ struct otg_transceiver {
 /* for board-specific init logic */
 extern int otg_set_transceiver(struct otg_transceiver *);
 
-#if defined(CONFIG_NOP_USB_XCEIV) || defined(CONFIG_NOP_USB_XCEIV_MODULE)
+#if defined(CONFIG_NOP_USB_XCEIV) || (defined(CONFIG_NOP_USB_XCEIV_MODULE) && defined(MODULE))
 /* sometimes transceivers are accessed only through e.g. ULPI */
 extern void usb_nop_xceiv_register(void);
 extern void usb_nop_xceiv_unregister(void);
@@ -164,8 +165,25 @@ otg_shutdown(struct otg_transceiver *otg)
 }
 
 /* for usb host and peripheral controller drivers */
+#ifdef CONFIG_USB_OTG_UTILS
 extern struct otg_transceiver *otg_get_transceiver(void);
 extern void otg_put_transceiver(struct otg_transceiver *);
+extern const char *otg_state_string(enum usb_otg_state state);
+#else
+static inline struct otg_transceiver *otg_get_transceiver(void)
+{
+        return NULL;
+}
+
+static inline void otg_put_transceiver(struct otg_transceiver *x)
+{
+}
+
+static inline const char *otg_state_string(enum usb_otg_state state)
+{
+        return NULL;
+}
+#endif
 
 /* Context: can sleep */
 static inline int
@@ -223,13 +241,13 @@ otg_start_srp(struct otg_transceiver *otg)
 static inline int
 otg_register_notifier(struct otg_transceiver *otg, struct notifier_block *nb)
 {
-        return blocking_notifier_chain_register(&otg->notifier, nb);
+        return atomic_notifier_chain_register(&otg->notifier, nb);
 }
 
 static inline void
 otg_unregister_notifier(struct otg_transceiver *otg, struct notifier_block *nb)
 {
-        blocking_notifier_chain_unregister(&otg->notifier, nb);
+        atomic_notifier_chain_unregister(&otg->notifier, nb);
 }
 
 /* for OTG controller drivers (and maybe other stuff) */