[RFC 2/2] clocksource: don't suspend/resume when unused

[Alexandre Belloni]

There is no point in calling suspend/resume for unused
clocksources.

Signed-off-by: Alexandre Belloni <alexandre.belloni at free-electrons.com>
---
 kernel/time/clocksource.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c
index 920a4da58eb0..baea4e42ae90 100644
--- a/kernel/time/clocksource.c
+++ b/kernel/time/clocksource.c
@@ -493,7 +493,7 @@ void clocksource_suspend(void)
 	struct clocksource *cs;
 
 	list_for_each_entry_reverse(cs, &clocksource_list, list)
-		if (cs->suspend)
+		if (cs->suspend && (cs->flags & CLOCK_SOURCE_USED))
 			cs->suspend(cs);
 }
 
@@ -505,7 +505,7 @@ void clocksource_resume(void)
 	struct clocksource *cs;
 
 	list_for_each_entry(cs, &clocksource_list, list)
-		if (cs->resume)
+		if (cs->resume && (cs->flags & CLOCK_SOURCE_USED))
 			cs->resume(cs);
 
 	clocksource_resume_watchdog();
-- 
2.1.0