powerpc/mpic: Simplify ipi cpu mask handling

Now that MSG_ALL and MSG_ALL_BUT_SELF have been eliminated,
smp_mpic_mesage_pass no longer needs to lookup the cpumask just to
have mpic_send_ipi extract part of it and recode it in a NR_CPUS loop
by mpic_physmask.

Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 11 insertions, 13 deletions

diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c
index 68ea50c4190..53121f62506 100644
--- a/arch/powerpc/sysdev/mpic.c
+++ b/arch/powerpc/sysdev/mpic.c
@@ -1613,30 +1613,28 @@ void mpic_request_ipis(void)
         }
 }
 
-static void mpic_send_ipi(unsigned int ipi_no, const struct cpumask *cpu_mask)
+void smp_mpic_message_pass(int cpu, int msg)
 {
         struct mpic *mpic = mpic_primary;
+        u32 physmask;
 
         BUG_ON(mpic == NULL);
 
-#ifdef DEBUG_IPI
-        DBG("%s: send_ipi(ipi_no: %d)\n", mpic->name, ipi_no);
-#endif
-
-        mpic_cpu_write(MPIC_INFO(CPU_IPI_DISPATCH_0) +
-                       ipi_no * MPIC_INFO(CPU_IPI_DISPATCH_STRIDE),
-                       mpic_physmask(cpumask_bits(cpu_mask)[0]));
-}
-
-void smp_mpic_message_pass(int cpu, int msg)
-{
         /* make sure we're sending something that translates to an IPI */
         if ((unsigned int)msg > 3) {
                 printk("SMP %d: smp_message_pass: unknown msg %d\n",
                        smp_processor_id(), msg);
                 return;
         }
-        mpic_send_ipi(msg, cpumask_of(cpu));
+
+#ifdef DEBUG_IPI
+        DBG("%s: send_ipi(ipi_no: %d)\n", mpic->name, msg);
+#endif
+
+        physmask = 1 << get_hard_smp_processor_id(cpu);
+
+        mpic_cpu_write(MPIC_INFO(CPU_IPI_DISPATCH_0) +
+                       msg * MPIC_INFO(CPU_IPI_DISPATCH_STRIDE), physmask);
 }
 
 int __init smp_mpic_probe(void)