Re: ❌ FAIL: Test report for kernel 5.14.0 (mainline.kernel.org-clang, f1583cb1)

[Nathan Chancellor <nathan@kernel.org>]

On Sat, Sep 04, 2021 at 12:10:14AM -0000, CKI Project wrote:
> 
> Hello,
> 
> We ran automated tests on a recent commit from this kernel tree:
> 
>        Kernel repo: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>             Commit: f1583cb1be35 - Merge tag 'linux-kselftest-next-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
> 
> The results of these automated tests are provided below.
> 
>     Overall result: FAILED (see details below)
>              Merge: OK
>            Compile: FAILED
>  Selftests compile: FAILED
> 
> All kernel binaries, config files, and logs are available for download here:
> 
>   https://arr-cki-prod-datawarehouse-public.s3.amazonaws.com/index.html?prefix=datawarehouse-public/2021/09/03/365103273
> 
> We attempted to compile the kernel for multiple architectures, but the compile
> failed on one or more architectures:
> 
>            ppc64le: FAILED (see build-ppc64le.log.xz attachment)
>              s390x: FAILED (see build-s390x.log.xz attachment)
> 
> We hope that these logs can help you find the problem quickly. For the full
> detail on our testing procedures, please scroll to the bottom of this message.
> 
> Please reply to this email if you have any questions about the tests that we
> ran or if you have any suggestions on how to make future tests more effective.
> 
>         ,-.   ,-.
>        ( C ) ( K )  Continuous
>         `-',-.`-'   Kernel
>           ( I )     Integration
>            `-'
> ______________________________________________________________________________
> 
> Compile testing
> ---------------
> 
> We compiled the kernel for 4 architectures:
> 
>     aarch64:
>       make options: make LLVM=1 -j24 INSTALL_MOD_STRIP=1 targz-pkg
> 
>     ppc64le:
>       make options: make CC=clang -j24 INSTALL_MOD_STRIP=1 targz-pkg
> 
>     s390x:
>       make options: make CC=clang -j24 INSTALL_MOD_STRIP=1 targz-pkg
> 
>     x86_64:
>       make options: make LLVM=1 -j24 INSTALL_MOD_STRIP=1 targz-pkg
> 
> 
> We built the following selftests:
> 
>   x86_64:
>       net: OK
>       bpf: fail
>       install and packaging: OK
> 
> You can find the full log (build-selftests.log) in the artifact storage above.
> 

ppc64le: https://github.com/ClangBuiltLinux/linux/issues/672

00:00:11 clang-13: error: unsupported argument '-mpower4' to option 'Wa,'
00:00:11 clang-13: error: unsupported argument '-many' to option 'Wa,'

s390: https://github.com/ClangBuiltLinux/linux/issues/1356

00:00:20 In file included from kernel/locking/lockdep.c:31:
00:00:20 In file included from ./include/linux/sched.h:14:
00:00:20 In file included from ./include/linux/pid.h:6:
00:00:20 In file included from ./include/linux/wait.h:9:
00:00:20 In file included from ./include/linux/spinlock.h:94:
00:00:20 ./arch/s390/include/asm/spinlock.h:89:3: error: expected absolute expression
00:00:20                 ALTERNATIVE("", ".long 0xb2fa0070", 49) /* NIAI 7 */
00:00:20                 ^
00:00:20 ./arch/s390/include/asm/alternative.h:111:2: note: expanded from macro 'ALTERNATIVE'
00:00:20         ALTINSTR_REPLACEMENT(altinstr, 1)                               \
00:00:20         ^
00:00:20 ./arch/s390/include/asm/alternative.h:106:2: note: expanded from macro 'ALTINSTR_REPLACEMENT'
00:00:20         INSTR_LEN_SANITY_CHECK(altinstr_len(num))
00:00:20         ^
00:00:20 ./arch/s390/include/asm/alternative.h:62:3: note: expanded from macro 'INSTR_LEN_SANITY_CHECK'
00:00:20         ".if " len " > 254\n"                                           \
00:00:20          ^
00:00:20 <inline asm>:5:5: note: instantiated into assembly here
00:00:20 .if 6651b-6641b > 254
00:00:20     ^

This is caused by the implicit switch to the integrated assembler in commit
f12b034afeb3 ("scripts/Makefile.clang: default to LLVM_IAS=1"). Please add
'LLVM_IAS=0' to the 'CC=clang' commands above and the build should be back to
passing like before.

Cheers,
Nathan