linux-kernel - [PATCH 29/31] thermal: core: add a comment describing the main update loop

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Message-Id: <1462341765-13268-30-git-send-email-edubezval@gmail.com>
Date:	Tue,  3 May 2016 23:02:43 -0700
From:	Eduardo Valentin <edubezval@...il.com>
To:	Rui Zhang <rui.zhang@...el.com>
Cc:	Linux PM <linux-pm@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Eduardo Valentin <edubezval@...il.com>
Subject: [PATCH 29/31] thermal: core: add a comment describing the main update loop

Simply marking the main update loop section and adding a
comment describing it.

Cc: Zhang Rui <rui.zhang@...el.com>
Cc: linux-pm@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Eduardo Valentin <edubezval@...il.com>
---
 drivers/thermal/thermal_core.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 0317aea..d552183 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -286,6 +286,17 @@ static void thermal_unregister_governors(void)
 	thermal_gov_power_allocator_unregister();
 }
 
+/*
+ * Zone update section: main control loop applied to each zone while monitoring
+ *
+ * in polling mode. The monitoring is done using a workqueue.
+ * Same update may be done on a zone by calling thermal_zone_device_update().
+ *
+ * An update means:
+ * - Non-critical trips will invoke the governor responsible for that zone;
+ * - Hot trips will produce a notification to userspace;
+ * - Critical trip point will cause a system shutdown.
+ */
 static void thermal_zone_device_set_polling(struct thermal_zone_device *tz,
 					    int delay)
 {
-- 
2.1.4