diff options
| -rw-r--r-- | include/uapi/linux/mmc/ioctl.h | 5 |
1 files changed, 4 insertions, 1 deletions
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 */ |