Merge branch 'for-linville' of git://github.com/kvalo/ath6kl

[karo-tx-linux.git] / fs / proc / stat.c

diff --git a/fs/proc/stat.c b/fs/proc/stat.c
index 6a0c62d6e4428bf38711d0afcd4d860061f0feb6..64c3b3172367abbd1c1464b9372f33ee4efa7acb 100644 (file)
--- a/fs/proc/stat.c
+++ b/fs/proc/stat.c
@@ -18,19 +18,39 @@
 #ifndef arch_irq_stat
 #define arch_irq_stat() 0
 #endif
-#ifndef arch_idle_time
-#define arch_idle_time(cpu) 0
-#endif
+
+#ifdef arch_idle_time
+
+static cputime64_t get_idle_time(int cpu)
+{
+       cputime64_t idle;
+
+       idle = kcpustat_cpu(cpu).cpustat[CPUTIME_IDLE];
+       if (cpu_online(cpu) && !nr_iowait_cpu(cpu))
+               idle += arch_idle_time(cpu);
+       return idle;
+}
+
+static cputime64_t get_iowait_time(int cpu)
+{
+       cputime64_t iowait;
+
+       iowait = kcpustat_cpu(cpu).cpustat[CPUTIME_IOWAIT];
+       if (cpu_online(cpu) && nr_iowait_cpu(cpu))
+               iowait += arch_idle_time(cpu);
+       return iowait;
+}
+
+#else
 
 static u64 get_idle_time(int cpu)
 {
        u64 idle, idle_time = get_cpu_idle_time_us(cpu, NULL);
 
-       if (idle_time == -1ULL) {
+       if (idle_time == -1ULL)
                /* !NO_HZ so we can rely on cpustat.idle */
                idle = kcpustat_cpu(cpu).cpustat[CPUTIME_IDLE];
-               idle += arch_idle_time(cpu);
-       } else
+       else
                idle = usecs_to_cputime64(idle_time);
 
        return idle;
@@ -49,6 +69,8 @@ static u64 get_iowait_time(int cpu)
        return iowait;
 }
 
+#endif
+
 static int show_stat(struct seq_file *p, void *v)
 {
        int i, j;