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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>
This commit is contained in:
Wolfram Sang 2018-12-03 20:56:47 +01:00 committed by Ulf Hansson
parent 1970701f80
commit 20427e5db3
1 changed files with 4 additions and 1 deletions
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5
include/uapi/linux/mmc/ioctl.h
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@ -5,7 +5,10 @@
#include <linux/types.h> #include <linux/types.h>
struct mmc_ioc_cmd { 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; int write_flag;
/* Application-specific command. true = precede with CMD55 */ /* Application-specific command. true = precede with CMD55 */