kbuild, bpf: reproducible BTF from pahole when KBUILD_BUILD_TIMESTAMP set #7286
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… set
Reproducible builds [1] require that the same source code with
the same set of tools can build identical objects each time,
but pahole in parallel mode was non-deterministic in
BTF generation prior to
dba7b5e ("pahole: Encode BTF serially in a reproducible build")
This was a problem since said BTF is baked into kernels and modules in
.BTF sections, so parallel pahole was causing non-reproducible binary
generation. Now with the above commit we have support for parallel
reproducible BTF generation in pahole.
KBUILD_BUILD_TIMESTAMP is set for reproducible builds, so if it
is set, add reproducible_build to --btf_features.
[1] Documentation/kbuild/reproducible-builds.rst
Signed-off-by: Alan Maguire <alan.maguire@oracle.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
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At least one diff in series https://patchwork.kernel.org/project/netdevbpf/list/?series=867235 expired. Closing PR. |
Pull request for series with
subject: kbuild, bpf: reproducible BTF from pahole when KBUILD_BUILD_TIMESTAMP set
version: 1
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=867235