linux-kernel - [PATCH 1/3] kernel: add calibration_delay

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Date:	Tue, 20 May 2014 18:36:09 +0300
From:	Peter De Schrijver <pdeschrijver@...dia.com>
To:	Peter De Schrijver <pdeschrijver@...dia.com>
CC:	Russell King <linux@....linux.org.uk>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Stephen Warren <swarren@...dotorg.org>,
	Thierry Reding <thierry.reding@...il.com>,
	Paul Gortmaker <paul.gortmaker@...driver.com>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <linux-tegra@...r.kernel.org>
Subject: [PATCH 1/3] kernel: add calibration_delay_done()

Add calibration_delay_done() call and dummy implementation. This allows
architectures to stop accepting registrations for new timer based delay
functions.

Signed-off-by: Peter De Schrijver <pdeschrijver@...dia.com>
---
 init/calibrate.c |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/init/calibrate.c b/init/calibrate.c
index 520702d..31cae76 100644
--- a/init/calibrate.c
+++ b/init/calibrate.c
@@ -262,6 +262,16 @@ unsigned long __attribute__((weak)) calibrate_delay_is_known(void)
 	return 0;
 }
 
+/*
+ * Indicate the cpu delay calibration is done. This can be used by
+ * architectures to stop accepting delay timer registrations after this point.
+ */
+
+void __attribute__((weak)) calibration_delay_done(void)
+{
+	return;
+}
+
 void calibrate_delay(void)
 {
 	unsigned long lpj;
@@ -301,4 +311,6 @@ void calibrate_delay(void)
 
 	loops_per_jiffy = lpj;
 	printed = true;
+
+	calibration_delay_done();
 }
-- 
1.7.7.rc0.72.g4b5ea.dirty

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