Re: [PATCH v3 1/4] limits.h: add UCHAR_MAX, SCHAR_MAX, and SCHAR_MIN

[Vincenzo Frascino <vincenzo.frascino@xxxxxxx>]

Hi Demi,

On 6/10/23 21:40, Demi Marie Obenour wrote:
> Some drivers already defined these, and they will be used by sscanf()
> for overflow checks later.  Also add SSIZE_MIN to limits.h, which will
> also be needed later.
> 
> Signed-off-by: Demi Marie Obenour <demi@xxxxxxxxxxxxxxxxxxxxxx>
> ---
>  .../media/atomisp/pci/hive_isp_css_include/platform_support.h  | 1 -
>  include/linux/limits.h                                         | 1 +
>  include/linux/mfd/wl1273-core.h                                | 3 ---
>  include/vdso/limits.h                                          | 3 +++
>  4 files changed, 4 insertions(+), 4 deletions(-)
> 
...

> diff --git a/include/vdso/limits.h b/include/vdso/limits.h
> index 
> 0197888ad0e00b2f853d3f25ffa764f61cca7385..0cad0a2490e5efc194d874025eb3e3b846a5c7b4
>  100644
> --- a/include/vdso/limits.h
> +++ b/include/vdso/limits.h
> @@ -2,6 +2,9 @@
>  #ifndef __VDSO_LIMITS_H
>  #define __VDSO_LIMITS_H
>  
> +#define UCHAR_MAX    ((unsigned char)~0U)
> +#define SCHAR_MAX    ((signed char)(UCHAR_MAX >> 1))
> +#define SCHAR_MIN    ((signed char)(-SCHAR_MAX - 1))

Are you planning to use those definitions in the vDSO library?

If not can you please define them in linux/limits.h, the vdso headers contain
only what is necessary for the vDSO library.

Thanks!

>  #define USHRT_MAX    ((unsigned short)~0U)
>  #define SHRT_MAX     ((short)(USHRT_MAX >> 1))
>  #define SHRT_MIN     ((short)(-SHRT_MAX - 1))

-- 
Regards,
Vincenzo