ACK: [K/Unstable][SRU][PATCH 0/1] Fix powerpc test build issue in ubuntu_kernel_selftests

[Tim Gardner]

On 12/30/22 3:05 AM, Po-Hsu Lin wrote:
> [Impact]
> When trying to build powerpc tests from ubuntu_kernel_selftests, it
> will fail with:
>      inlined from ‘cycles_with_mmcr2’ at cycles_with_mmcr2_test.c:81:3:
> /usr/include/powerpc64le-linux-gnu/bits/stdio2.h:86:10: error: ‘actual’ may be used uninitialized [-Werror=maybe-uninitialized]
>     86 | return __printf_chk (__USE_FORTIFY_LEVEL - 1, __fmt, __va_arg_pack ());
>        | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> cycles_with_mmcr2_test.c: In function ‘cycles_with_mmcr2’:
> cycles_with_mmcr2_test.c:25:36: note: ‘actual’ was declared here
>     25 | uint64_t val, expected[2], actual;
>        | ^~~~~~
> cc1: all warnings being treated as errors
> 
> [Fix]
> * ff446cd768 "selftests/powerpc: Avoid GCC 12 uninitialised variable warning"
> This patch can be cherry-picked into Kinetic kernel.
> 
> [Test]
> Apply this patch to the kernel tree and build it with:
> sudo make -C linux/tools/testing/selftests TARGETS=powerpc
> 
> With this error fixed, test compliation can finish without any issue.
> 
> [Where problems could occur]
> Change for test case, no impact to acutal function.
> 
> 
> Michael Ellerman (1):
>    selftests/powerpc: Avoid GCC 12 uninitialised variable warning
> 
>   tools/testing/selftests/powerpc/pmu/ebb/cycles_with_mmcr2_test.c | 1 +
>   1 file changed, 1 insertion(+)
> 
Acked-by: Tim Gardner <tim.gardner at canonical.com>
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Tim Gardner
Canonical, Inc