Merge branch 'irq-fixes-for-linus-4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'irq-fixes-for-linus-4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  sparseirq: move __weak symbols into separate compilation unit
  sparseirq: work around __weak alias bug
  sparseirq: fix hang with !SPARSE_IRQ
  sparseirq: set lock_class for legacy irq when sparse_irq is selected
  sparseirq: work around compiler optimizing away __weak functions
  sparseirq: fix desc->lock init
  sparseirq: do not printk when migrating IRQ descriptors
  sparseirq: remove duplicated arch_early_irq_init()
  irq: simplify for_each_irq_desc() usage
  proc: remove ifdef CONFIG_SPARSE_IRQ from stat.c
  irq: for_each_irq_desc() move to irqnr.h
  hrtimer: remove #include <linux/irq.h>

1 files changed, 13 insertions, 10 deletions

diff --git a/include/linux/irqnr.h b/include/linux/irqnr.h
index 95d2b74641f5..5504a5c97836 100644
--- a/include/linux/irqnr.h
+++ b/include/linux/irqnr.h
@@ -15,20 +15,23 @@
 
 # define for_each_irq_desc_reverse(irq, desc)                          \
         for (irq = nr_irqs - 1; irq >= 0; irq--)
-#else
+#else /* CONFIG_GENERIC_HARDIRQS */
 
 extern int nr_irqs;
+extern struct irq_desc *irq_to_desc(unsigned int irq);
 
-#ifndef CONFIG_SPARSE_IRQ
+# define for_each_irq_desc(irq, desc)                                   \
+        for (irq = 0, desc = irq_to_desc(irq); irq < nr_irqs;           \
+             irq++, desc = irq_to_desc(irq))                            \
+                if (desc)
 
-struct irq_desc;
-# define for_each_irq_desc(irq, desc)           \
-        for (irq = 0, desc = irq_desc; irq < nr_irqs; irq++, desc++)
-# define for_each_irq_desc_reverse(irq, desc)                          \
-        for (irq = nr_irqs - 1, desc = irq_desc + (nr_irqs - 1);        \
-            irq >= 0; irq--, desc--)
-#endif
-#endif
+
+# define for_each_irq_desc_reverse(irq, desc)                           \
+        for (irq = nr_irqs - 1, desc = irq_to_desc(irq); irq >= 0;      \
+             irq--, desc = irq_to_desc(irq))                            \
+                if (desc)
+
+#endif /* CONFIG_GENERIC_HARDIRQS */
 
 #define for_each_irq_nr(irq)                   \
        for (irq = 0; irq < nr_irqs; irq++)