Re: [PATCH v6,4/4] drivers: misc: new driver sram_uapi for user level SRAM access

[Arnd Bergmann]

On Sat, Apr 18, 2020 at 6:22 PM Wang Wenhu <wenhu.wang@xxxxxxxx> wrote:
> +#define DRIVER_NAME    "sram_uapi"
> +
> +#define SRAM_UAPI_IOCTL_SET_SRAM_TYPE  0
> +#define SRAM_UAPI_IOCTL_ALLOC          1
> +#define SRAM_UAPI_IOCTL_FREE           2
> +
> +struct res_info {
> +       u32 offset;
> +       u32 size;
> +};

This is of course not a proper ioctl interface at all, please see
Documentation/driver-api/ioctl.rst for how to define the numbers
in a uapi header file.

The offset/size arguments should probably be 64 bit wide.

       Arnd