x86: remove some alloc_bootmem_cpumask_var calling

Now that we set up the slab allocator earlier, we can get rid of some
alloc_bootmem_cpumask_var() calls in boot code.

Cc: Ingo Molnar <mingo@elte.hu>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>

5 files changed, 12 insertions, 29 deletions

diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 1946fac42ab3..139201a562ba 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -185,8 +185,8 @@ int __init arch_early_irq_init(void)
         for (i = 0; i < count; i++) {
                 desc = irq_to_desc(i);
                 desc->chip_data = &cfg[i];
-                alloc_bootmem_cpumask_var(&cfg[i].domain);
-                alloc_bootmem_cpumask_var(&cfg[i].old_domain);
+                alloc_cpumask_var(&cfg[i].domain, GFP_NOWAIT);
+                alloc_cpumask_var(&cfg[i].old_domain, GFP_NOWAIT);
                 if (i < NR_IRQS_LEGACY)
                         cpumask_setall(cfg[i].domain);
         }
diff --git a/include/linux/irq.h b/include/linux/irq.h
index eedbb8e5e0cc..1e50c34f0062 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -430,23 +430,19 @@ extern int set_irq_msi(unsigned int irq, struct msi_desc *entry);
  * Returns true if successful (or not required).
  */
 static inline bool alloc_desc_masks(struct irq_desc *desc, int node,
-                                                                bool boot)
+                                                        bool boot)
 {
-#ifdef CONFIG_CPUMASK_OFFSTACK
-        if (boot) {
-                alloc_bootmem_cpumask_var(&desc->affinity);
+        gfp_t gfp = GFP_ATOMIC;
 
-#ifdef CONFIG_GENERIC_PENDING_IRQ
-                alloc_bootmem_cpumask_var(&desc->pending_mask);
-#endif
-                return true;
-        }
+        if (boot)
+                gfp = GFP_NOWAIT;
 
-        if (!alloc_cpumask_var_node(&desc->affinity, GFP_ATOMIC, node))
+#ifdef CONFIG_CPUMASK_OFFSTACK
+        if (!alloc_cpumask_var_node(&desc->affinity, gfp, node))
                 return false;
 
 #ifdef CONFIG_GENERIC_PENDING_IRQ
-        if (!alloc_cpumask_var_node(&desc->pending_mask, GFP_ATOMIC, node)) {
+        if (!alloc_cpumask_var_node(&desc->pending_mask, gfp, node)) {
                 free_cpumask_var(desc->affinity);
                 return false;
         }
diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index 026faccca869..d5a7e17474ee 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -1857,7 +1857,7 @@ struct cgroup_subsys cpuset_subsys = {
 
 int __init cpuset_init_early(void)
 {
-        alloc_bootmem_cpumask_var(&top_cpuset.cpus_allowed);
+        alloc_cpumask_var(&top_cpuset.cpus_allowed, GFP_NOWAIT);
 
         top_cpuset.mems_generation = cpuset_mems_generation++;
         return 0;
diff --git a/kernel/profile.c b/kernel/profile.c
index 7724e0409bae..28cf26ad2d24 100644
--- a/kernel/profile.c
+++ b/kernel/profile.c
@@ -111,12 +111,6 @@ int __ref profile_init(void)
         /* only text is profiled */
         prof_len = (_etext - _stext) >> prof_shift;
         buffer_bytes = prof_len*sizeof(atomic_t);
-        if (!slab_is_available()) {
-                prof_buffer = alloc_bootmem(buffer_bytes);
-                alloc_bootmem_cpumask_var(&prof_cpu_mask);
-                cpumask_copy(prof_cpu_mask, cpu_possible_mask);
-                return 0;
-        }
 
         if (!alloc_cpumask_var(&prof_cpu_mask, GFP_KERNEL))
                 return -ENOMEM;
diff --git a/lib/cpumask.c b/lib/cpumask.c
index eb23aaa0c7b8..7bb4142a502f 100644
--- a/lib/cpumask.c
+++ b/lib/cpumask.c
@@ -92,15 +92,8 @@ int cpumask_any_but(const struct cpumask *mask, unsigned int cpu)
  */
 bool alloc_cpumask_var_node(cpumask_var_t *mask, gfp_t flags, int node)
 {
-        if (likely(slab_is_available()))
-                *mask = kmalloc_node(cpumask_size(), flags, node);
-        else {
-#ifdef CONFIG_DEBUG_PER_CPU_MAPS
-                printk(KERN_ERR
-                        "=> alloc_cpumask_var: kmalloc not available!\n");
-#endif
-                *mask = NULL;
-        }
+        *mask = kmalloc_node(cpumask_size(), flags, node);
+
 #ifdef CONFIG_DEBUG_PER_CPU_MAPS
         if (!*mask) {
                 printk(KERN_ERR "=> alloc_cpumask_var: failed!\n");