clocksource: Add some debug info about clocksources being registered

Print the mask, max_cycles, and max_idle_ns values for
clocksources being registered.

Signed-off-by: John Stultz <[email protected]>
Cc: Dave Jones <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Prarit Bhargava <[email protected]>
Cc: Richard Cochran <[email protected]>
Cc: Stephen Boyd <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>

diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c
index 5cdf17eb4fa677988da8c348958cb57c74728390..1977ebabd9226b4509f853f3798c5d1bd10001f9 100644 (file)
--- a/kernel/time/clocksource.c
+++ b/kernel/time/clocksource.c
@@ -703,6 +703,9 @@ void __clocksource_updatefreq_scale(struct clocksource *cs, u32 scale, u32 freq)
                cs->name);
 
        clocksource_update_max_deferment(cs);
+
+       pr_info("clocksource %s: mask: 0x%llx max_cycles: 0x%llx, max_idle_ns: %lld ns\n",
+                       cs->name, cs->mask, cs->max_cycles, cs->max_idle_ns);
 }
 EXPORT_SYMBOL_GPL(__clocksource_updatefreq_scale);