Re: [PATCH v3] powerpc: fix EDEADLOCK redefinition error in uapi/asm/errno.h

[Tony Ambardar <tony.ambardar@gmail.com>]

On Mon, 21 Sep 2020 at 05:54, Sasha Levin <sashal@kernel.org> wrote:
>
> Hi
>
> [This is an automated email]
>
> This commit has been processed because it contains a -stable tag.
> The stable tag indicates that it's relevant for the following trees: all
>
> The bot has tested the following trees: v5.8.10, v5.4.66, v4.19.146, v4.14.198, v4.9.236, v4.4.236.
>
> v5.8.10: Build OK!
> v5.4.66: Build OK!
> v4.19.146: Build OK!
> v4.14.198: Failed to apply! Possible dependencies:
>     7af7919f0f4b ("tools include s390: Grab a copy of arch/s390/include/uapi/asm/unistd.h")
>     95f28190aa01 ("tools include arch: Grab a copy of errno.h for arch's supported by perf")
>     a3f22d505f56 ("s390/perf: add callback to perf to enable using AUX buffer")
>     a81c42136604 ("perf s390: add regs_query_register_offset()")
>     a9fc2db0a8ab ("s390/perf: define common DWARF register string table")
>     f704ef44602f ("s390/perf: add support for perf_regs and libdw")
>
> v4.9.236: Failed to apply! Possible dependencies:
>     0c744ea4f77d ("Linux 4.10-rc2")
>     2bd6bf03f4c1 ("Linux 4.14-rc1")
>     2ea659a9ef48 ("Linux 4.12-rc1")
>     49def1853334 ("Linux 4.10-rc4")
>     566cf877a1fc ("Linux 4.10-rc6")
>     5771a8c08880 ("Linux v4.13-rc1")
>     7089db84e356 ("Linux 4.10-rc8")
>     7a308bb3016f ("Linux 4.10-rc5")
>     7af7919f0f4b ("tools include s390: Grab a copy of arch/s390/include/uapi/asm/unistd.h")
>     7ce7d89f4883 ("Linux 4.10-rc1")
>     95f28190aa01 ("tools include arch: Grab a copy of errno.h for arch's supported by perf")
>     a121103c9228 ("Linux 4.10-rc3")
>     a81c42136604 ("perf s390: add regs_query_register_offset()")
>     a9fc2db0a8ab ("s390/perf: define common DWARF register string table")
>     b24413180f56 ("License cleanup: add SPDX GPL-2.0 license identifier to files with no license")
>     c1ae3cfa0e89 ("Linux 4.11-rc1")
>     c470abd4fde4 ("Linux 4.10")
>     d5adbfcd5f7b ("Linux 4.10-rc7")
>
> v4.4.236: Failed to apply! Possible dependencies:
>     0c4d40d58075 ("tools build: Add BPF feature check to test-all")
>     1925459b4d92 ("tools build: Fix feature Makefile issues with 'O='")
>     58683600dfe3 ("perf build: Use FEATURE-DUMP in bpf subproject")
>     76ee2ff34274 ("tools build feature: Move dwarf post unwind choice output into perf")
>     7af7919f0f4b ("tools include s390: Grab a copy of arch/s390/include/uapi/asm/unistd.h")
>     8ee4646038e4 ("perf build: Add libcrypto feature detection")
>     95f28190aa01 ("tools include arch: Grab a copy of errno.h for arch's supported by perf")
>     96b9e70b8e6c ("perf build: Introduce FEATURES_DUMP make variable")
>     9fd4186ac19a ("tools build: Allow subprojects select all feature checkers")
>     abb26210a395 ("perf tools: Force fixdep compilation at the start of the build")
>     aeafd623f866 ("perf tools: Move headers check into bash script")
>     c053a1506fae ("perf build: Select all feature checkers for feature-dump")
>     d4dfdf00d43e ("perf jvmti: Plug compilation into perf build")
>     d58ac0bf8d1e ("perf build: Add clang and llvm compile and linking support")
>     d8ad6a15cc3a ("tools lib bpf: Don't do a feature check when cleaning")
>     e12b202f8fb9 ("perf jitdump: Build only on supported archs")
>     e26e63be64a1 ("perf build: Add sdt feature detection")
>
>
> NOTE: The patch will not be queued to stable trees until it is upstream.
>
> How should we proceed with this patch?
>
[cc: linux-ppc, Arnd, Paul]

The patch makes identical changes to
'arch/powerpc/include/uapi/asm/errno.h' and its copy
'tools/arch/powerpc/include/uapi/asm/errno.h' first created in kernel
v4.16. Since it's the patch
hunk for the latter file which is failing on backports to < v4.16, I
would think it OK to skip
that hunk where the latter file is missing. I'd prefer to let Michael
decide the best course as
he's still reviewing the patch.

Thanks,
Tony
> --
> Thanks
> Sasha