1 files changed, 73 insertions, 0 deletions

diff --git a/lib/cpumask.c b/lib/cpumask.c
index 5f97dc25ef9c..5ceb4211c834 100644
--- a/lib/cpumask.c
+++ b/lib/cpumask.c
@@ -2,6 +2,7 @@
 #include <linux/bitops.h>
 #include <linux/cpumask.h>
 #include <linux/module.h>
+#include <linux/bootmem.h>
 
 int __first_cpu(const cpumask_t *srcp)
 {
@@ -35,3 +36,75 @@ int __any_online_cpu(const cpumask_t *mask)
         return cpu;
 }
 EXPORT_SYMBOL(__any_online_cpu);
+
+/**
+ * cpumask_next_and - get the next cpu in *src1p & *src2p
+ * @n: the cpu prior to the place to search (ie. return will be > @n)
+ * @src1p: the first cpumask pointer
+ * @src2p: the second cpumask pointer
+ *
+ * Returns >= nr_cpu_ids if no further cpus set in both.
+ */
+int cpumask_next_and(int n, const struct cpumask *src1p,
+                     const struct cpumask *src2p)
+{
+        while ((n = cpumask_next(n, src1p)) < nr_cpu_ids)
+                if (cpumask_test_cpu(n, src2p))
+                        break;
+        return n;
+}
+EXPORT_SYMBOL(cpumask_next_and);
+
+/**
+ * cpumask_any_but - return a "random" in a cpumask, but not this one.
+ * @mask: the cpumask to search
+ * @cpu: the cpu to ignore.
+ *
+ * Often used to find any cpu but smp_processor_id() in a mask.
+ * Returns >= nr_cpu_ids if no cpus set.
+ */
+int cpumask_any_but(const struct cpumask *mask, unsigned int cpu)
+{
+        unsigned int i;
+
+        for_each_cpu(i, mask)
+                if (i != cpu)
+                        break;
+        return i;
+}
+
+/* These are not inline because of header tangles. */
+#ifdef CONFIG_CPUMASK_OFFSTACK
+bool alloc_cpumask_var(cpumask_var_t *mask, gfp_t flags)
+{
+        if (likely(slab_is_available()))
+                *mask = kmalloc(cpumask_size(), flags);
+        else {
+#ifdef CONFIG_DEBUG_PER_CPU_MAPS
+                printk(KERN_ERR
+                        "=> alloc_cpumask_var: kmalloc not available!\n");
+                dump_stack();
+#endif
+                *mask = NULL;
+        }
+#ifdef CONFIG_DEBUG_PER_CPU_MAPS
+        if (!*mask) {
+                printk(KERN_ERR "=> alloc_cpumask_var: failed!\n");
+                dump_stack();
+        }
+#endif
+        return *mask != NULL;
+}
+EXPORT_SYMBOL(alloc_cpumask_var);
+
+void __init alloc_bootmem_cpumask_var(cpumask_var_t *mask)
+{
+        *mask = alloc_bootmem(cpumask_size());
+}
+
+void free_cpumask_var(cpumask_var_t mask)
+{
+        kfree(mask);
+}
+EXPORT_SYMBOL(free_cpumask_var);
+#endif