linux-kernel - [tip:timers/core] clocksource: Add some debug info about clocksources being registered

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Message-ID: <tip-8cc8c525ad4e7b581cacf84119e1a28dcb4044db@git.kernel.org>
Date:	Fri, 13 Mar 2015 02:04:19 -0700
From:	tip-bot for John Stultz <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	sboyd@...eaurora.org, tglx@...utronix.de, davej@...emonkey.org.uk,
	hpa@...or.com, linux-kernel@...r.kernel.org,
	john.stultz@...aro.org, torvalds@...ux-foundation.org,
	peterz@...radead.org, prarit@...hat.com, richardcochran@...il.com,
	mingo@...nel.org
Subject: [tip:timers/core] clocksource:
  Add some debug info about clocksources being registered

Commit-ID:  8cc8c525ad4e7b581cacf84119e1a28dcb4044db
Gitweb:     http://git.kernel.org/tip/8cc8c525ad4e7b581cacf84119e1a28dcb4044db
Author:     John Stultz <john.stultz@...aro.org>
AuthorDate: Wed, 11 Mar 2015 21:16:39 -0700
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Fri, 13 Mar 2015 08:07:07 +0100

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 <john.stultz@...aro.org>
Cc: Dave Jones <davej@...emonkey.org.uk>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Prarit Bhargava <prarit@...hat.com>
Cc: Richard Cochran <richardcochran@...il.com>
Cc: Stephen Boyd <sboyd@...eaurora.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Link: http://lkml.kernel.org/r/1426133800-29329-12-git-send-email-john.stultz@linaro.org
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 kernel/time/clocksource.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c
index 5cdf17e..1977eba 100644
--- 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);
 
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