cpumask: remove x86 cpumask_t uses.

Impact: cleanup

We are removing cpumask_t in favour of struct cpumask: mainly as a
marker of what code is now CONFIG_CPUMASK_OFFSTACK-safe.

The only non-trivial change here is vector_allocation_domain():
explicitly clear the mask and set the first word, rather than using
assignment.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

arch/x86/include/asm/topology.h

@@ -89,7 +89,7 @@ static inline int early_cpu_to_node(int cpu)
 extern cpumask_var_t node_to_cpumask_map[MAX_NUMNODES];
 
 #ifdef CONFIG_DEBUG_PER_CPU_MAPS
-extern const cpumask_t *cpumask_of_node(int node);
+extern const struct cpumask *cpumask_of_node(int node);
 #else
 /* Returns a pointer to the cpumask of CPUs on Node 'node'. */
 static inline const struct cpumask *cpumask_of_node(int node)
@@ -172,7 +172,7 @@ static inline int early_cpu_to_node(int cpu)
 	return 0;
 }
 
-static inline const cpumask_t *cpumask_of_node(int node)
+static inline const struct cpumask *cpumask_of_node(int node)
 {
 	return cpu_online_mask;
 }

arch/x86/kernel/apic/es7000_32.c

@@ -410,7 +410,7 @@ static void es7000_enable_apic_mode(void)
 		WARN(1, "Command failed, status = %x\n", mip_status);
 }
 
-static void es7000_vector_allocation_domain(int cpu, cpumask_t *retmask)
+static void es7000_vector_allocation_domain(int cpu, struct cpumask *retmask)
 {
 	/* Careful. Some cpus do not strictly honor the set of cpus
 	 * specified in the interrupt destination when using lowest
@@ -456,7 +456,7 @@ static int es7000_apic_id_registered(void)
 	return 1;
 }
 
-static const cpumask_t *target_cpus_cluster(void)
+static const struct cpumask *target_cpus_cluster(void)
 {
 	return cpu_all_mask;
 }
@@ -573,7 +573,7 @@ static int es7000_check_phys_apicid_present(int cpu_physical_apicid)
 	return 1;
 }
 
-static unsigned int es7000_cpu_mask_to_apicid(const cpumask_t *cpumask)
+static unsigned int es7000_cpu_mask_to_apicid(const struct cpumask *cpumask)
 {
 	unsigned int round = 0;
 	int cpu, uninitialized_var(apicid);

arch/x86/kernel/apic/numaq_32.c

@@ -334,7 +334,7 @@ static inline void numaq_smp_callin_clear_local_apic(void)
 	clear_local_APIC();
 }
 
-static inline const cpumask_t *numaq_target_cpus(void)
+static inline const struct cpumask *numaq_target_cpus(void)
 {
 	return cpu_all_mask;
 }
@@ -427,7 +427,7 @@ static inline int numaq_check_phys_apicid_present(int boot_cpu_physical_apicid)
  * We use physical apicids here, not logical, so just return the default
  * physical broadcast to stop people from breaking us
  */
-static inline unsigned int numaq_cpu_mask_to_apicid(const cpumask_t *cpumask)
+static unsigned int numaq_cpu_mask_to_apicid(const struct cpumask *cpumask)
 {
 	return 0x0F;
 }
@@ -462,7 +462,7 @@ static int probe_numaq(void)
 	return found_numaq;
 }
 
-static void numaq_vector_allocation_domain(int cpu, cpumask_t *retmask)
+static void numaq_vector_allocation_domain(int cpu, struct cpumask *retmask)
 {
 	/* Careful. Some cpus do not strictly honor the set of cpus
 	 * specified in the interrupt destination when using lowest

arch/x86/kernel/apic/summit_32.c

@@ -182,7 +182,7 @@ static inline int is_WPEG(struct rio_detail *rio){
 
 #define SUMMIT_APIC_DFR_VALUE	(APIC_DFR_CLUSTER)
 
-static const cpumask_t *summit_target_cpus(void)
+static const struct cpumask *summit_target_cpus(void)
 {
 	/* CPU_MASK_ALL (0xff) has undefined behaviour with
 	 * dest_LowestPrio mode logical clustered apic interrupt routing
@@ -285,7 +285,7 @@ static int summit_check_phys_apicid_present(int boot_cpu_physical_apicid)
 	return 1;
 }
 
-static unsigned int summit_cpu_mask_to_apicid(const cpumask_t *cpumask)
+static unsigned int summit_cpu_mask_to_apicid(const struct cpumask *cpumask)
 {
 	unsigned int round = 0;
 	int cpu, apicid = 0;
@@ -342,7 +342,7 @@ static int probe_summit(void)
 	return 0;
 }
 
-static void summit_vector_allocation_domain(int cpu, cpumask_t *retmask)
+static void summit_vector_allocation_domain(int cpu, struct cpumask *retmask)
 {
 	/* Careful. Some cpus do not strictly honor the set of cpus
 	 * specified in the interrupt destination when using lowest

arch/x86/mm/numa.c

@@ -45,7 +45,7 @@ void __init setup_node_to_cpumask_map(void)
 /*
  * Returns a pointer to the bitmask of CPUs on Node 'node'.
  */
-const cpumask_t *cpumask_of_node(int node)
+const struct cpumask *cpumask_of_node(int node)
 {
 	if (node >= nr_node_ids) {
 		printk(KERN_WARNING

arch/x86/mm/numa_64.c

@@ -697,7 +697,7 @@ void __cpuinit numa_remove_cpu(int cpu)
 static void __cpuinit numa_set_cpumask(int cpu, int enable)
 {
 	int node = early_cpu_to_node(cpu);
-	cpumask_t *mask;
+	struct cpumask *mask;
 	char buf[64];
 
 	mask = node_to_cpumask_map[node];