* 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:
*
* 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
*
#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_;
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); \
* 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
#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 */