powerpc/kexec: make masking/disabling interrupts generic

Right now just the kexec crash pathway turns turns off the interrupts.
Pull that out and make a generic version for use elsewhere

Signed-off-by: Matthew McClintock <msm@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

1 files changed, 24 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/machine_kexec.c b/arch/powerpc/kernel/machine_kexec.c
index dd6c141f1662..df7e20c191cd 100644
--- a/arch/powerpc/kernel/machine_kexec.c
+++ b/arch/powerpc/kernel/machine_kexec.c
@@ -14,10 +14,34 @@
 #include <linux/threads.h>
 #include <linux/memblock.h>
 #include <linux/of.h>
+#include <linux/irq.h>
+
 #include <asm/machdep.h>
 #include <asm/prom.h>
 #include <asm/sections.h>
 
+void machine_kexec_mask_interrupts(void) {
+        unsigned int i;
+
+        for_each_irq(i) {
+                struct irq_desc *desc = irq_to_desc(i);
+
+                if (!desc || !desc->chip)
+                        continue;
+
+                if (desc->chip->eoi &&
+                    desc->status & IRQ_INPROGRESS)
+                        desc->chip->eoi(i);
+
+                if (desc->chip->mask)
+                        desc->chip->mask(i);
+
+                if (desc->chip->disable &&
+                    !(desc->status & IRQ_DISABLED))
+                        desc->chip->disable(i);
+        }
+}
+
 void machine_crash_shutdown(struct pt_regs *regs)
 {
         if (ppc_md.machine_crash_shutdown)