Blackfin: merge Philippe's recent ipipe patch

ipipe-2.6.28.9-blackfin-git95aafe6.patch
Singed-off-by: Philippe Gerum <rpm@xenomai.org>
Signed-off-by: Yi Li <yi.li@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

arch/blackfin/include/asm/ipipe.h

@@ -35,10 +35,10 @@
 #include <asm/atomic.h>
 #include <asm/traps.h>
 
-#define IPIPE_ARCH_STRING     "1.9-00"
+#define IPIPE_ARCH_STRING     "1.9-01"
 #define IPIPE_MAJOR_NUMBER    1
 #define IPIPE_MINOR_NUMBER    9
-#define IPIPE_PATCH_NUMBER    0
+#define IPIPE_PATCH_NUMBER    1
 
 #ifdef CONFIG_SMP
 #error "I-pipe/blackfin: SMP not implemented"

arch/blackfin/kernel/ipipe.c

@@ -167,7 +167,7 @@ int __ipipe_check_root(void)
 void __ipipe_enable_irqdesc(struct ipipe_domain *ipd, unsigned irq)
 {
 	struct irq_desc *desc = irq_to_desc(irq);
-	int prio = desc->ic_prio;
+	int prio = __ipipe_get_irq_priority(irq);
 
 	desc->depth = 0;
 	if (ipd != &ipipe_root &&
@@ -178,8 +178,7 @@ EXPORT_SYMBOL(__ipipe_enable_irqdesc);
 
 void __ipipe_disable_irqdesc(struct ipipe_domain *ipd, unsigned irq)
 {
-	struct irq_desc *desc = irq_to_desc(irq);
-	int prio = desc->ic_prio;
+	int prio = __ipipe_get_irq_priority(irq);
 
 	if (ipd != &ipipe_root &&
 	    atomic_dec_and_test(&__ipipe_irq_lvdepth[prio]))
@@ -310,12 +309,16 @@ int ipipe_trigger_irq(unsigned irq)
 
 asmlinkage void __ipipe_sync_root(void)
 {
+	void (*irq_tail_hook)(void) = (void (*)(void))__ipipe_irq_tail_hook;
 	unsigned long flags;
 
 	BUG_ON(irqs_disabled());
 
 	local_irq_save_hw(flags);
 
+	if (irq_tail_hook)
+		irq_tail_hook();
+
 	clear_thread_flag(TIF_IRQ_SYNC);
 
 	if (ipipe_root_cpudom_var(irqpend_himask) != 0)

arch/blackfin/mach-common/ints-priority.c

@@ -1139,13 +1139,6 @@ int __init init_arch_irq(void)
 	bfin_write_SIC_IWR(IWR_DISABLE_ALL);
 #endif
 
-#ifdef CONFIG_IPIPE
-	for (irq = 0; irq < NR_IRQS; irq++) {
-		struct irq_desc *desc = irq_to_desc(irq);
-		desc->ic_prio = __ipipe_get_irq_priority(irq);
-	}
-#endif /* CONFIG_IPIPE */
-
 	return 0;
 }