powerpc/cpumask: Convert mpic driver to new cpumask API

Convert to the new cpumask API.

irq_choose_cpu can be simplified by using cpumask_next and cpumask_first.

smp_mpic_message_pass was doing open coded cpumask manipulation and passing an
int for a cpumask into mpic_send_ipi. Since mpic_send_ipi is only used
locally, make it static and convert it to take a cpumask. This allows us
to clean up the mess in smp_mpic_message_pass.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

2 files changed, 39 insertions, 36 deletions

diff --git a/arch/powerpc/include/asm/mpic.h b/arch/powerpc/include/asm/mpic.h
index 61913d9a21a0..e000cce8f6dd 100644
--- a/arch/powerpc/include/asm/mpic.h
+++ b/arch/powerpc/include/asm/mpic.h
@@ -463,9 +463,6 @@ extern void mpic_cpu_set_priority(int prio);
 /* Request IPIs on primary mpic */
 extern void mpic_request_ipis(void);
 
-/* Send an IPI (non offseted number 0..3) */
-extern void mpic_send_ipi(unsigned int ipi_no, unsigned int cpu_mask);
-
 /* Send a message (IPI) to a given target (cpu number or MSG_*) */
 void smp_mpic_message_pass(int target, int msg);
 
diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c
index 260295b10557..2102487612a4 100644
--- a/arch/powerpc/sysdev/mpic.c
+++ b/arch/powerpc/sysdev/mpic.c
@@ -568,12 +568,12 @@ static void __init mpic_scan_ht_pics(struct mpic *mpic)
 #endif /* CONFIG_MPIC_U3_HT_IRQS */
 
 #ifdef CONFIG_SMP
-static int irq_choose_cpu(const cpumask_t *mask)
+static int irq_choose_cpu(const struct cpumask *mask)
 {
         int cpuid;
 
         if (cpumask_equal(mask, cpu_all_mask)) {
-                static int irq_rover;
+                static int irq_rover = 0;
                 static DEFINE_RAW_SPINLOCK(irq_rover_lock);
                 unsigned long flags;
 
@@ -581,15 +581,11 @@ static int irq_choose_cpu(const cpumask_t *mask)
         do_round_robin:
                 raw_spin_lock_irqsave(&irq_rover_lock, flags);
 
-                while (!cpu_online(irq_rover)) {
-                        if (++irq_rover >= NR_CPUS)
-                                irq_rover = 0;
-                }
+                irq_rover = cpumask_next(irq_rover, cpu_online_mask);
+                if (irq_rover >= nr_cpu_ids)
+                        irq_rover = cpumask_first(cpu_online_mask);
+
                 cpuid = irq_rover;
-                do {
-                        if (++irq_rover >= NR_CPUS)
-                                irq_rover = 0;
-                } while (!cpu_online(irq_rover));
 
                 raw_spin_unlock_irqrestore(&irq_rover_lock, flags);
         } else {
@@ -601,7 +597,7 @@ static int irq_choose_cpu(const cpumask_t *mask)
         return get_hard_smp_processor_id(cpuid);
 }
 #else
-static int irq_choose_cpu(const cpumask_t *mask)
+static int irq_choose_cpu(const struct cpumask *mask)
 {
         return hard_smp_processor_id();
 }
@@ -814,12 +810,16 @@ int mpic_set_affinity(unsigned int irq, const struct cpumask *cpumask)
 
                 mpic_irq_write(src, MPIC_INFO(IRQ_DESTINATION), 1 << cpuid);
         } else {
-                cpumask_t tmp;
+                cpumask_var_t tmp;
 
-                cpumask_and(&tmp, cpumask, cpu_online_mask);
+                alloc_cpumask_var(&tmp, GFP_KERNEL);
+
+                cpumask_and(tmp, cpumask, cpu_online_mask);
 
                 mpic_irq_write(src, MPIC_INFO(IRQ_DESTINATION),
-                               mpic_physmask(cpus_addr(tmp)[0]));
+                               mpic_physmask(cpumask_bits(tmp)[0]));
+
+                free_cpumask_var(tmp);
         }
 
         return 0;
@@ -1479,21 +1479,6 @@ void mpic_teardown_this_cpu(int secondary)
 }
 
 
-void mpic_send_ipi(unsigned int ipi_no, unsigned int cpu_mask)
-{
-        struct mpic *mpic = mpic_primary;
-
-        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(cpu_mask & cpus_addr(cpu_online_map)[0]));
-}
-
 static unsigned int _mpic_get_one_irq(struct mpic *mpic, int reg)
 {
         u32 src;
@@ -1589,8 +1574,25 @@ void mpic_request_ipis(void)
         }
 }
 
+static void mpic_send_ipi(unsigned int ipi_no, const struct cpumask *cpu_mask)
+{
+        struct mpic *mpic = mpic_primary;
+
+        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 target, int msg)
 {
+        cpumask_var_t tmp;
+
         /* 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",
@@ -1599,13 +1601,17 @@ void smp_mpic_message_pass(int target, int msg)
         }
         switch (target) {
         case MSG_ALL:
-                mpic_send_ipi(msg, 0xffffffff);
+                mpic_send_ipi(msg, cpu_online_mask);
                 break;
         case MSG_ALL_BUT_SELF:
-                mpic_send_ipi(msg, 0xffffffff & ~(1 << smp_processor_id()));
+                alloc_cpumask_var(&tmp, GFP_NOWAIT);
+                cpumask_andnot(tmp, cpu_online_mask,
+                               cpumask_of(smp_processor_id()));
+                mpic_send_ipi(msg, tmp);
+                free_cpumask_var(tmp);
                 break;
         default:
-                mpic_send_ipi(msg, 1 << target);
+                mpic_send_ipi(msg, cpumask_of(target));
                 break;
         }
 }
@@ -1616,7 +1622,7 @@ int __init smp_mpic_probe(void)
 
         DBG("smp_mpic_probe()...\n");
 
-        nr_cpus = cpus_weight(cpu_possible_map);
+        nr_cpus = cpumask_weight(cpu_possible_mask);
 
         DBG("nr_cpus: %d\n", nr_cpus);