Name: Remove Useless cpumask Initializers
Status: Untested
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

Some places cpumasks are initialized and don't need to be, AFAICT.

Index: linux-2.6.13-rc4-git3-Misc/arch/i386/kernel/cpu/cpufreq/powernow-k8.c
===================================================================
--- linux-2.6.13-rc4-git3-Misc.orig/arch/i386/kernel/cpu/cpufreq/powernow-k8.c	2005-08-01 11:31:21.000000000 +1000
+++ linux-2.6.13-rc4-git3-Misc/arch/i386/kernel/cpu/cpufreq/powernow-k8.c	2005-08-01 16:31:35.000000000 +1000
@@ -447,7 +447,7 @@
 
 static int check_supported_cpu(unsigned int cpu)
 {
-	cpumask_t oldmask = CPU_MASK_ALL;
+	cpumask_t oldmask;
 	u32 eax, ebx, ecx, edx;
 	unsigned int rc = 0;
 
@@ -893,7 +893,7 @@
 /* Driver entry point to switch to the target frequency */
 static int powernowk8_target(struct cpufreq_policy *pol, unsigned targfreq, unsigned relation)
 {
-	cpumask_t oldmask = CPU_MASK_ALL;
+	cpumask_t oldmask;
 	struct powernow_k8_data *data = powernow_data[pol->cpu];
 	u32 checkfid = data->currfid;
 	u32 checkvid = data->currvid;
@@ -976,7 +976,7 @@
 static int __init powernowk8_cpu_init(struct cpufreq_policy *pol)
 {
 	struct powernow_k8_data *data;
-	cpumask_t oldmask = CPU_MASK_ALL;
+	cpumask_t oldmask;
 	int rc, i;
 
 	if (!check_supported_cpu(pol->cpu))
Index: linux-2.6.13-rc4-git3-Misc/arch/ppc64/kernel/xics.c
===================================================================
--- linux-2.6.13-rc4-git3-Misc.orig/arch/ppc64/kernel/xics.c	2005-08-01 11:29:55.000000000 +1000
+++ linux-2.6.13-rc4-git3-Misc/arch/ppc64/kernel/xics.c	2005-08-01 16:31:35.000000000 +1000
@@ -242,22 +242,19 @@
 static int get_irq_server(unsigned int irq)
 {
 	unsigned int server;
-	/* For the moment only implement delivery to all cpus or one cpu */
-	cpumask_t cpumask = irq_affinity[irq];
-	cpumask_t tmp = CPU_MASK_NONE;
 
 	if (!distribute_irqs)
 		return default_server;
 
+	/* For the moment only implement delivery to all cpus or one cpu */
 	if (cpus_equal(cpumask, CPU_MASK_ALL)) {
 		server = default_distrib_server;
 	} else {
-		cpus_and(tmp, cpu_online_map, cpumask);
-
-		if (cpus_empty(tmp))
+		int cpu = any_online_cpu(irq_affinity[irq]);
+		if (cpu == NR_CPUS)
 			server = default_distrib_server;
 		else
-			server = get_hard_smp_processor_id(first_cpu(tmp));
+			server = get_hard_smp_processor_id(cpu);
 	}
 
 	return server;
@@ -613,7 +610,6 @@
 	int status;
 	int xics_status[2];
 	unsigned long newmask;
-	cpumask_t tmp = CPU_MASK_NONE;
 
 	irq = virt_irq_to_real(irq_offset_down(virq));
 	if (irq == XICS_IPI || irq == NO_IRQ)