linux 2.6.16.38 w/ vs2.0.3-rc1

[linux-2.6.git] / include / linux / cpumask.h

diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h
index b15826f..a47ad70 100644 (file)
--- a/include/linux/cpumask.h
+++ b/include/linux/cpumask.h
@@ -12,6 +12,8 @@
  * see bitmap_scnprintf() and bitmap_parse() in lib/bitmap.c.
  * For details of cpulist_scnprintf() and cpulist_parse(), see
  * bitmap_scnlistprintf() and bitmap_parselist(), also in bitmap.c.
+ * For details of cpu_remap(), see bitmap_bitremap in lib/bitmap.c
+ * For details of cpus_remap(), see bitmap_remap in lib/bitmap.c.
  *
  * The available cpumask operations are:
  *
@@ -50,6 +52,8 @@
  * int cpumask_parse(ubuf, ulen, mask) Parse ascii string as cpumask
  * int cpulist_scnprintf(buf, len, mask) Format cpumask as list for printing
  * int cpulist_parse(buf, map)         Parse ascii string as cpulist
+ * int cpu_remap(oldbit, old, new)     newbit = map(old, new)(oldbit)
+ * int cpus_remap(dst, src, old, new)  *dst = map(old, new)(src)
  *
  * for_each_cpu_mask(cpu, mask)                for-loop cpu over mask
  *
@@ -80,7 +84,6 @@
 #include <linux/kernel.h>
 #include <linux/threads.h>
 #include <linux/bitmap.h>
-#include <asm/bug.h>
 
 typedef struct { DECLARE_BITMAP(bits, NR_CPUS); } cpumask_t;
 extern cpumask_t _unused_cpumask_arg_;
@@ -294,6 +297,22 @@ static inline int __cpulist_parse(const char *buf, cpumask_t *dstp, int nbits)
        return bitmap_parselist(buf, dstp->bits, nbits);
 }
 
+#define cpu_remap(oldbit, old, new) \
+               __cpu_remap((oldbit), &(old), &(new), NR_CPUS)
+static inline int __cpu_remap(int oldbit,
+               const cpumask_t *oldp, const cpumask_t *newp, int nbits)
+{
+       return bitmap_bitremap(oldbit, oldp->bits, newp->bits, nbits);
+}
+
+#define cpus_remap(dst, src, old, new) \
+               __cpus_remap(&(dst), &(src), &(old), &(new), NR_CPUS)
+static inline void __cpus_remap(cpumask_t *dstp, const cpumask_t *srcp,
+               const cpumask_t *oldp, const cpumask_t *newp, int nbits)
+{
+       bitmap_remap(dstp->bits, srcp->bits, oldp->bits, newp->bits, nbits);
+}
+
 #if NR_CPUS > 1
 #define for_each_cpu_mask(cpu, mask)           \
        for ((cpu) = first_cpu(mask);           \
@@ -309,7 +328,7 @@ static inline int __cpulist_parse(const char *buf, cpumask_t *dstp, int nbits)
  * bitmap of size NR_CPUS.
  *
  *  #ifdef CONFIG_HOTPLUG_CPU
- *     cpu_possible_map - all NR_CPUS bits set
+ *     cpu_possible_map - has bit 'cpu' set iff cpu is populatable
  *     cpu_present_map  - has bit 'cpu' set iff cpu is populated
  *     cpu_online_map   - has bit 'cpu' set iff cpu available to scheduler
  *  #else
@@ -389,7 +408,18 @@ extern cpumask_t cpu_present_map;
 })
 
 #define for_each_cpu(cpu)        for_each_cpu_mask((cpu), cpu_possible_map)
+#define for_each_possible_cpu(cpu)  for_each_cpu_mask((cpu), cpu_possible_map)
 #define for_each_online_cpu(cpu)  for_each_cpu_mask((cpu), cpu_online_map)
 #define for_each_present_cpu(cpu) for_each_cpu_mask((cpu), cpu_present_map)
 
+/* Find the highest possible smp_processor_id() */
+#define highest_possible_processor_id() \
+({ \
+       unsigned int cpu, highest = 0; \
+       for_each_cpu_mask(cpu, cpu_possible_map) \
+               highest = cpu; \
+       highest; \
+})
+
+
 #endif /* __LINUX_CPUMASK_H */