| Message ID | 20181203195647.6261-1-wsa+renesas@sang-engineering.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2] mmc: document 'Reliable Write' bit in uapi header | expand |
On Mon, 3 Dec 2018 at 20:56, Wolfram Sang <wsa+renesas@sang-engineering.com> wrote: > > 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> Applied for next, thanks! Kind regards Uffe > --- > > Change since V1: > * reworded first line of comment as well. Thanks, Geert! > > Still not super happy about shifting into the sign bit, but yeah... > don't break userspace, I guess. > > include/uapi/linux/mmc/ioctl.h | 5 ++++- > 1 file changed, 4 insertions(+), 1 deletion(-) > > diff --git a/include/uapi/linux/mmc/ioctl.h b/include/uapi/linux/mmc/ioctl.h > index 45f369dc0a42..00c08120f3ba 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 */ > -- > 2.11.0 >
diff --git a/include/uapi/linux/mmc/ioctl.h b/include/uapi/linux/mmc/ioctl.h index 45f369dc0a42..00c08120f3ba 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 */