[LTP] [PATCH] close_range: check for kernel support below 5.9

[Petr Vorel]

Hi Edward,

good catch :).

Reviewed-by: Petr Vorel <pvorel@suse.cz>

...
> +++ b/include/lapi/close_range.h
> @@ -25,4 +25,17 @@ static inline int close_range(unsigned int fd, unsigned int max_fd,
>  	return tst_syscall(__NR_close_range, fd, max_fd, flags);
>  }
>  # endif
> +
> +static inline void close_range_supported_by_kernel(void)
> +{
> +	long ret;
> +
> +	if ((tst_kvercmp(5, 9, 0)) < 0) {
> +		/* Check if the syscall is backported on an older kernel */
BTW what particular use case this fixed? Is it backported to some android
kernel? Or to some enterprise distro? Because I don't think kernel stable trees
accept new functionality, just fixes.

Kind regards,
Petr