Merge tag 'regmap-3.4' into regmap-stride

regmap: Last minute bug fix for 3.4

This is a last minute bug fix that was only just noticed since the code
path that's being exercised here is one that is fairly rarely used.  The
changelog for the change itself is extremely clear and the code itself
is obvious to inspection so should be pretty safe.

Conflicts:
	drivers/base/regmap/regmap.c (overlap between the fix and stride code)

1 files changed, 28 insertions, 6 deletions

diff --git a/fs/proc/stat.c b/fs/proc/stat.c
index 6a0c62d6e44..64c3b317236 100644
--- 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;