Merge branch 'x86/cleanups' into x86/core

[linux-2.6-omap-h63xx.git] / drivers / base / cpu.c

diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index 4259072f5bd0960e113bb97d0f8aaa1818a8ab58..5b257a57bc57ae60e369950b60126f3d43f43e04 100644 (file)
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -107,7 +107,7 @@ static SYSDEV_ATTR(crash_notes, 0400, show_crash_notes, NULL);
 /*
  * Print cpu online, possible, present, and system maps
  */
-static ssize_t print_cpus_map(char *buf, cpumask_t *map)
+static ssize_t print_cpus_map(char *buf, const struct cpumask *map)
 {
        int n = cpulist_scnprintf(buf, PAGE_SIZE-2, map);
 
@@ -128,10 +128,54 @@ print_cpus_func(online);
 print_cpus_func(possible);
 print_cpus_func(present);
 
+/*
+ * Print values for NR_CPUS and offlined cpus
+ */
+static ssize_t print_cpus_kernel_max(struct sysdev_class *class, char *buf)
+{
+       int n = snprintf(buf, PAGE_SIZE-2, "%d\n", NR_CPUS - 1);
+       return n;
+}
+static SYSDEV_CLASS_ATTR(kernel_max, 0444, print_cpus_kernel_max, NULL);
+
+/* arch-optional setting to enable display of offline cpus >= nr_cpu_ids */
+unsigned int total_cpus;
+
+static ssize_t print_cpus_offline(struct sysdev_class *class, char *buf)
+{
+       int n = 0, len = PAGE_SIZE-2;
+       cpumask_var_t offline;
+
+       /* display offline cpus < nr_cpu_ids */
+       if (!alloc_cpumask_var(&offline, GFP_KERNEL))
+               return -ENOMEM;
+       cpumask_complement(offline, cpu_online_mask);
+       n = cpulist_scnprintf(buf, len, offline);
+       free_cpumask_var(offline);
+
+       /* display offline cpus >= nr_cpu_ids */
+       if (total_cpus && nr_cpu_ids < total_cpus) {
+               if (n && n < len)
+                       buf[n++] = ',';
+
+               if (nr_cpu_ids == total_cpus-1)
+                       n += snprintf(&buf[n], len - n, "%d", nr_cpu_ids);
+               else
+                       n += snprintf(&buf[n], len - n, "%d-%d",
+                                                     nr_cpu_ids, total_cpus-1);
+       }
+
+       n += snprintf(&buf[n], len - n, "\n");
+       return n;
+}
+static SYSDEV_CLASS_ATTR(offline, 0444, print_cpus_offline, NULL);
+
 static struct sysdev_class_attribute *cpu_state_attr[] = {
        &attr_online_map,
        &attr_possible_map,
        &attr_present_map,
+       &attr_kernel_max,
+       &attr_offline,
 };
 
 static int cpu_states_init(void)