Re: [PATCH iproute2-next v3] lib/fs: fix issue when {name,open}_to_handle_at() is not implemented

[David Ahern <dsahern@gmail.com>]

On 5/8/21 12:49 AM, Heiko Thiery wrote:
> With commit d5e6ee0dac64 the usage of functions name_to_handle_at() and
> open_by_handle_at() are introduced. But these function are not available
> e.g. in uclibc-ng < 1.0.35. To have a backward compatibility check for the
> availability in the configure script and in case of absence do a direct
> syscall.
> 
> Fixes: d5e6ee0dac64 ("ss: introduce cgroup2 cache and helper functions")
> Cc: Dmitry Yakunin <zeil@yandex-team.ru>
> Cc: Petr Vorel <petr.vorel@gmail.com>
> Signed-off-by: Heiko Thiery <heiko.thiery@gmail.com>
> ---
> v3:
>  - use correct syscall number (thanks to Petr Vorel)
>  - add #include <sys/syscall.h> (thanks to Petr Vorel)
>  - remove bogus parameters (thanks to Petr Vorel)
>  - fix #ifdef (thanks to Petr Vorel)
>  - added Fixes tag (thanks to David Ahern)
>  - build test with buildroot 2020.08.3 using uclibc 1.0.34
> 
> v2:
>  - small correction to subject
>  - removed IP_CONFIG_HANDLE_AT:=y option since it is not required
>  - fix indentation in check function
>  - removed empty lines (thanks to Petr Vorel)
>  - add #define _GNU_SOURCE in check (thanks to Petr Vorel)
>  - check only for name_to_handle_at (thanks to Petr Vorel)
> 
>  configure | 28 ++++++++++++++++++++++++++++
>  lib/fs.c  | 25 +++++++++++++++++++++++++
>  2 files changed, 53 insertions(+)
> 

applied to iproute2-next.