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SubjectRe: [tip:sched/core 7/28] rseq.c:139:37: error: 'AT_RSEQ_ALIGN' undeclared; did you mean 'R_SH_ALIGN'?
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On 2023-01-16 14:40, kernel test robot wrote:
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git sched/core
> head: 79ba1e607d68178db7d3fe4f6a4aa38f06805e7b
> commit: 03f5c0272d1b59343144e199becc911dae52c37e [7/28] selftests/rseq: Use ELF auxiliary vector for extensible rseq
> compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
> reproduce:
> # https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=03f5c0272d1b59343144e199becc911dae52c37e
> git remote add tip https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git
> git fetch --no-tags tip sched/core
> git checkout 03f5c0272d1b59343144e199becc911dae52c37e
> make O=/tmp/kselftest headers
> make O=/tmp/kselftest -C tools/testing/selftests
>
> If you fix the issue, kindly add following tag where applicable
> | Reported-by: kernel test robot <lkp@intel.com>

In order to fix this, I need to change -I../../../../usr/include/ for
$(KHDR_INCLUDES) in tools/testing/selftests/rseq/Makefile

I can find 25 odd uses of the same pattern in the kernel selftests.
Should I fix them all in one go ?

grep -r "../../../../usr/include/" tools/testing/selftests/ | wc -l
25

AFAIU it typically works just because the build system happens to have
recent enough kernel headers installed in the root environment.

Thanks,

Mathieu


>
> All errors (new ones prefixed by >>):
>
> rseq.c: In function 'get_rseq_feature_size':
>>> rseq.c:139:37: error: 'AT_RSEQ_ALIGN' undeclared (first use in this function); did you mean 'R_SH_ALIGN'?
> 139 | auxv_rseq_align = getauxval(AT_RSEQ_ALIGN);
> | ^~~~~~~~~~~~~
> | R_SH_ALIGN
> rseq.c:139:37: note: each undeclared identifier is reported only once for each function it appears in
>>> rseq.c:142:44: error: 'AT_RSEQ_FEATURE_SIZE' undeclared (first use in this function); did you mean 'ORIG_RSEQ_FEATURE_SIZE'?
> 142 | auxv_rseq_feature_size = getauxval(AT_RSEQ_FEATURE_SIZE);
> | ^~~~~~~~~~~~~~~~~~~~
> | ORIG_RSEQ_FEATURE_SIZE
>

--
Mathieu Desnoyers
EfficiOS Inc.
https://www.efficios.com

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