Merge branches 'tracing/doc', 'tracing/ftrace', 'tracing/printk' and 'linus' into...

[linux-2.6-omap-h63xx.git] / arch / blackfin / kernel / irqchip.c

diff --git a/arch/blackfin/kernel/irqchip.c b/arch/blackfin/kernel/irqchip.c
index 75724eee6494c65c87545e14682f8cfe213877dd..1ab5b532ec724c97e02dc1f71282aa9918d9a83f 100644 (file)
--- a/arch/blackfin/kernel/irqchip.c
+++ b/arch/blackfin/kernel/irqchip.c
@@ -70,6 +70,11 @@ static struct irq_desc bad_irq_desc = {
 #endif
 };
 
+#ifdef CONFIG_CPUMASK_OFFSTACK
+/* We are not allocating a variable-sized bad_irq_desc.affinity */
+#error "Blackfin architecture does not support CONFIG_CPUMASK_OFFSTACK."
+#endif
+
 int show_interrupts(struct seq_file *p, void *v)
 {
        int i = *(loff_t *) v, j;
@@ -144,11 +149,15 @@ asmlinkage void asm_do_IRQ(unsigned int irq, struct pt_regs *regs)
 #endif
        generic_handle_irq(irq);
 
-#ifndef CONFIG_IPIPE   /* Useless and bugous over the I-pipe: IRQs are threaded. */
-       /* If we're the only interrupt running (ignoring IRQ15 which is for
-          syscalls), lower our priority to IRQ14 so that softirqs run at
-          that level.  If there's another, lower-level interrupt, irq_exit
-          will defer softirqs to that.  */
+#ifndef CONFIG_IPIPE
+       /*
+        * If we're the only interrupt running (ignoring IRQ15 which
+        * is for syscalls), lower our priority to IRQ14 so that
+        * softirqs run at that level.  If there's another,
+        * lower-level interrupt, irq_exit will defer softirqs to
+        * that. If the interrupt pipeline is enabled, we are already
+        * running at IRQ14 priority, so we don't need this code.
+        */
        CSYNC();
        pending = bfin_read_IPEND() & ~0x8000;
        other_ints = pending & (pending - 1);