From: Wolfram Sang <wsa+renesas@sang-engineering.com>
Date: Mon, 3 Dec 2018 19:56:47 +0000 (+0100)
Subject: mmc: document 'Reliable Write' bit in uapi header
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=20427e5db3f96fc054c6a6ad95606906b834deb1;p=linux.git

mmc: document 'Reliable Write' bit in uapi header

If we use it this way, people should know about it. Also, replace
true/false with nonzero/zero because the flag is not strictly a bool
anymore.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---

diff --git a/include/uapi/linux/mmc/ioctl.h b/include/uapi/linux/mmc/ioctl.h
index 45f369dc0a426..00c08120f3ba6 100644
--- a/include/uapi/linux/mmc/ioctl.h
+++ b/include/uapi/linux/mmc/ioctl.h
@@ -5,7 +5,10 @@
 #include <linux/types.h>
 
 struct mmc_ioc_cmd {
-	/* Implies direction of data.  true = write, false = read */
+	/*
+	 * Direction of data: nonzero = write, zero = read.
+	 * Bit 31 selects 'Reliable Write' for RPMB.
+	 */
 	int write_flag;
 
 	/* Application-specific command.  true = precede with CMD55 */