[LTP] [PATCH] getrlimit/getrlimit03: fix unavailable __NR_getrlimit for arm

[Cyril Hrubis <chrubis@suse.cz>]

Hi!
> __NR_getrlimit has been deprecated from arm EABI, and is only available
> if the OABI_COMPAT config option is defined.
> This causes failures with the current test as it assumes that
> __NR_getrlimit exists if __NR_ugetrlimit is defined, while this
> assumption does not hold anymore.
> 
> Catch this exception by testing if __NR_getrlimit is defined and the
> target is arm.

I suppose that this a proper fix for:

https://github.com/linux-test-project/ltp/issues/819

> Signed-off-by: Alessio Balsini <balsini@android.com>
> ---
>  testcases/kernel/syscalls/getrlimit/getrlimit03.c | 10 +++++++++-
>  1 file changed, 9 insertions(+), 1 deletion(-)
> 
> diff --git a/testcases/kernel/syscalls/getrlimit/getrlimit03.c b/testcases/kernel/syscalls/getrlimit/getrlimit03.c
> index 319bc494a..e46a25f7b 100644
> --- a/testcases/kernel/syscalls/getrlimit/getrlimit03.c
> +++ b/testcases/kernel/syscalls/getrlimit/getrlimit03.c
> @@ -45,6 +45,14 @@
>  #define __NR_getrlimit_ulong_str	"__NR_getrlimit"
>  #endif
>  
> +/**
> + * __NR_getrlimit has been deprecated from arm EABI and moved to OABI_COMPAT,
> + * so the syscall may or may not be available.
> + */
> +#if defined(__arm__) && __NR_getrlimit == __LTP__NR_INVALID_SYSCALL
> +#define DEPRECATED_GETRLIMIT
> +#endif
> +
>  #ifndef HAVE_STRUCT_RLIMIT64
>  struct rlimit64 {
>  	uint64_t rlim_cur;
> @@ -167,7 +175,7 @@ static void run(unsigned int resource)
>  	tst_res(TPASS, "__NR_prlimit64(%d) and %s(%d) gave consistent results",
>  		resource, __NR_getrlimit_ulong_str, resource);
>  
> -#if SIGNED_GETRLIMIT
> +#if SIGNED_GETRLIMIT && !defined(DEPRECATED_GETRLIMIT)
>  	errno = 0;
>  	ret_l = getrlimit_long(resource, &rlim_l);
>  	errno_l = errno;

I guess that this generates a few unused function warnings, can we fix
all the places with #if SIGNED_GETRLIMIT in the source code please?

-- 
Cyril Hrubis
chrubis@suse.cz