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Subjectclang: arch/x86/boot/printf.c:257:3: error: unannotated fall-through between switch labels [-Werror,-Wimplicit-fallthrough]
The following x86 build failed on Linux next-20240517 tag due to following
warnings / errors only seen with clang builds.

Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>

Build errors:
----
arch/x86/boot/printf.c:257:3: error: unannotated fall-through between
switch labels [-Werror,-Wimplicit-fallthrough]
257 | case 'u':
| ^
arch/x86/boot/printf.c:257:3: note: insert 'break;' to avoid fall-through
257 | case 'u':
| ^
| break;
1 error generated.

The suspected patch,
x86/boot: Add a fallthrough annotation

metadata:
---
git_describe: next-20240517
git_repo: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next
git_sha: c75962170e49f24399141276ae119e6a879f36dc
git_short_log: c75962170e49 ("Add linux-next specific files for 20240517")
build_name: clang-18-lkftconfig


Links:
- https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240517/testrun/23951572/suite/build/test/clang-18-lkftconfig/log
- https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240517/testrun/23951572/suite/build/test/clang-18-lkftconfig/details/
- https://storage.tuxsuite.com/public/linaro/lkft/builds/2gZwb1q4GHgVCuOfQIMCJ6tqMFn/


--
Linaro LKFT
https://lkft.linaro.org

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