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, 10 insertions, 11 deletions

diff --git a/kernel/irq/resend.c b/kernel/irq/resend.c
index 090c3763f3a2..14dd5761e8c9 100644
--- a/kernel/irq/resend.c
+++ b/kernel/irq/resend.c
@@ -23,7 +23,7 @@
 #ifdef CONFIG_HARDIRQS_SW_RESEND
 
 /* Bitmap to handle software resend of interrupts: */
-static DECLARE_BITMAP(irqs_resend, NR_IRQS);
+static DECLARE_BITMAP(irqs_resend, IRQ_BITMAP_BITS);
 
 /*
  * Run software resends of IRQ's
@@ -55,22 +55,21 @@ static DECLARE_TASKLET(resend_tasklet, resend_irqs, 0);
  */
 void check_irq_resend(struct irq_desc *desc, unsigned int irq)
 {
-        unsigned int status = desc->status;
-
-        /*
-         * Make sure the interrupt is enabled, before resending it:
-         */
-        desc->chip->enable(irq);
-
         /*
          * We do not resend level type interrupts. Level type
          * interrupts are resent by hardware when they are still
          * active.
          */
-        if ((status & (IRQ_LEVEL | IRQ_PENDING | IRQ_REPLAY)) == IRQ_PENDING) {
-                desc->status = (status & ~IRQ_PENDING) | IRQ_REPLAY;
+        if (irq_settings_is_level(desc))
+                return;
+        if (desc->istate & IRQS_REPLAY)
+                return;
+        if (desc->istate & IRQS_PENDING) {
+                desc->istate &= ~IRQS_PENDING;
+                desc->istate |= IRQS_REPLAY;
 
-                if (!desc->chip->retrigger || !desc->chip->retrigger(irq)) {
+                if (!desc->irq_data.chip->irq_retrigger ||
+                    !desc->irq_data.chip->irq_retrigger(&desc->irq_data)) {
 #ifdef CONFIG_HARDIRQS_SW_RESEND
                         /* Set it pending and activate the softirq: */
                         set_bit(irq, irqs_resend);