powerpc/irq: Remove IRQF_DISABLED

Since commit [e58aa3d2: genirq: Run irq handlers with interrupts disabled],
We run all interrupt handlers with interrupts disabled
and we even check and yell when an interrupt handler
returns with interrupts enabled (see commit [b738a50a:
genirq: Warn when handler enables interrupts]).

So now this flag is a NOOP and can be removed.

Signed-off-by: Yong Zhang <yong.zhang0@gmail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Geoff Levand <geoff@infradead.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c
index 0842c6f..8c7e852 100644
--- a/arch/powerpc/sysdev/mpic.c
+++ b/arch/powerpc/sysdev/mpic.c
@@ -800,8 +800,6 @@
 	 * IPIs are marked IRQ_PER_CPU. This has the side effect of
 	 * preventing the IRQ_PENDING/IRQ_INPROGRESS logic from
 	 * applying to them. We EOI them late to avoid re-entering.
-	 * We mark IPI's with IRQF_DISABLED as they must run with
-	 * irqs disabled.
 	 */
 	mpic_eoi(mpic);
 }
diff --git a/arch/powerpc/sysdev/ppc4xx_soc.c b/arch/powerpc/sysdev/ppc4xx_soc.c
index d3d6ce3..0debcc3 100644
--- a/arch/powerpc/sysdev/ppc4xx_soc.c
+++ b/arch/powerpc/sysdev/ppc4xx_soc.c
@@ -115,7 +115,7 @@
 	}
 
 	/* Install error handler */
-	if (request_irq(irq, l2c_error_handler, IRQF_DISABLED, "L2C", 0) < 0) {
+	if (request_irq(irq, l2c_error_handler, 0, "L2C", 0) < 0) {
 		printk(KERN_ERR "Cannot install L2C error handler"
 		       ", cache is not enabled\n");
 		of_node_put(np);
diff --git a/arch/powerpc/sysdev/xics/xics-common.c b/arch/powerpc/sysdev/xics/xics-common.c
index 3d93a8d..63762c6 100644
--- a/arch/powerpc/sysdev/xics/xics-common.c
+++ b/arch/powerpc/sysdev/xics/xics-common.c
@@ -134,11 +134,10 @@
 	BUG_ON(ipi == NO_IRQ);
 
 	/*
-	 * IPIs are marked IRQF_DISABLED as they must run with irqs
-	 * disabled, and PERCPU.  The handler was set in map.
+	 * IPIs are marked IRQF_PERCPU. The handler was set in map.
 	 */
 	BUG_ON(request_irq(ipi, icp_ops->ipi_action,
-			   IRQF_DISABLED|IRQF_PERCPU, "IPI", NULL));
+			   IRQF_PERCPU, "IPI", NULL));
 }
 
 int __init xics_smp_probe(void)