On 17 Dec 2020, at 20:28, John Baldwin <j...@freebsd.org> wrote:
> 
> Author: jhb
> Date: Thu Dec 17 20:28:53 2020
> New Revision: 368738
> URL: https://svnweb.freebsd.org/changeset/base/368738
> 
> Log:
>  Cleanups to *ERR* compat shims.
> 
>  - Use [u]intptr_t casts to convert pointers to integers.
> 
>  - Change IS_ERR* to return bool instead of long.
> 
>  Reviewed by: manu
>  Obtained from:       CheriBSD
>  Sponsored by:        DARPA
>  Differential Revision:       https://reviews.freebsd.org/D27577
> 
> Modified:
>  head/sys/compat/linuxkpi/common/include/linux/err.h
> 
> Modified: head/sys/compat/linuxkpi/common/include/linux/err.h
> ==============================================================================
> --- head/sys/compat/linuxkpi/common/include/linux/err.h       Thu Dec 17 
> 20:11:31 2020        (r368737)
> +++ head/sys/compat/linuxkpi/common/include/linux/err.h       Thu Dec 17 
> 20:28:53 2020        (r368738)
> @@ -37,30 +37,30 @@
> 
> #define MAX_ERRNO     4095
> 
> -#define IS_ERR_VALUE(x) unlikely((x) >= (unsigned long)-MAX_ERRNO)
> +#define IS_ERR_VALUE(x) unlikely((x) >= (uintptr_t)-MAX_ERRNO)
> 
> static inline void *
> ERR_PTR(long error)
> {
> -     return (void *)error;
> +     return (void *)(intptr_t)error;
> }
> 
> static inline long
> PTR_ERR(const void *ptr)
> {
> -     return (long)ptr;
> +     return (intptr_t)ptr;

This should probably be (long)(intptr_t) after no longer changing the
return type to intptr_t?

Jess

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