linux-kernel - [PATCH RFC v0 07/12] kernel/userspace additions for addition ioctl() support for rtc

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Date:	Mon, 11 Apr 2016 22:29:15 -0700
From:	"Bill Huey (hui)" <bill.huey@...il.com>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Steven Rostedt <rostedt@...dmis.org>,
	linux-kernel@...r.kernel.org
Cc:	Dario Faggioli <raistlin@...ux.it>,
	Alessandro Zummo <a.zummo@...ertech.it>,
	Thomas Gleixner <tglx@...utronix.de>,
	KY Srinivasan <kys@...rosoft.com>,
	Amir Frenkel <frenkel.amir@...il.com>,
	Bdale Garbee <bdale@....com>
Subject: [PATCH RFC v0 07/12] kernel/userspace additions for addition ioctl() support for rtc

Add additional ioctl() values to rtc so that it can 'admit' the calling
thread into a red-black tree for tracking, set the execution slot pattern,
support for setting whether read() will yield or block.

Signed-off-by: Bill Huey (hui) <bill.huey@...il.com>
---
 include/uapi/linux/rtc.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/uapi/linux/rtc.h b/include/uapi/linux/rtc.h
index f8c82e6..76c9254 100644
--- a/include/uapi/linux/rtc.h
+++ b/include/uapi/linux/rtc.h
@@ -94,6 +94,10 @@ struct rtc_pll_info {
 #define RTC_VL_READ	_IOR('p', 0x13, int)	/* Voltage low detector */
 #define RTC_VL_CLR	_IO('p', 0x14)		/* Clear voltage low information */
 
+#define RTC_OV_ADMIT	_IOW('p', 0x15, unsigned long)	 /* Set test       */
+#define RTC_OV_REPLEN	_IOW('p', 0x16, unsigned long)	 /* Set test       */
+#define RTC_OV_YIELD	_IOW('p', 0x17, unsigned long)	 /* Set test       */
+
 /* interrupt flags */
 #define RTC_IRQF 0x80	/* Any of the following is active */
 #define RTC_PF 0x40	/* Periodic interrupt */
-- 
2.5.0