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author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-10-14 07:07:36 +0200 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-10-14 07:07:36 +0200 |
commit | 27d6e47f8e133167af51a3e39548cd3e9bed07da (patch) | |
tree | 069abe69fc8e247ef9ca4443afc11d04aa1e723c /Documentation/kbuild/reproducible-builds.rst | |
parent | 9dc86c234e845a5f60c5af013e647795c784df87 (diff) | |
parent | 4f5cafb5cb8471e54afdc9054d973535614f7675 (diff) |
Merge 5.4-rc3 into staging-next
We want the staging driver fixes in here as well to build on and test
with.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/kbuild/reproducible-builds.rst')
-rw-r--r-- | Documentation/kbuild/reproducible-builds.rst | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/Documentation/kbuild/reproducible-builds.rst b/Documentation/kbuild/reproducible-builds.rst index ab92e98c89c8..503393854e2e 100644 --- a/Documentation/kbuild/reproducible-builds.rst +++ b/Documentation/kbuild/reproducible-builds.rst @@ -16,16 +16,21 @@ the kernel may be unreproducible, and how to avoid them. Timestamps ---------- -The kernel embeds a timestamp in two places: +The kernel embeds timestamps in three places: * The version string exposed by ``uname()`` and included in ``/proc/version`` * File timestamps in the embedded initramfs -By default the timestamp is the current time. This must be overridden -using the `KBUILD_BUILD_TIMESTAMP`_ variable. If you are building -from a git commit, you could use its commit date. +* If enabled via ``CONFIG_IKHEADERS``, file timestamps of kernel + headers embedded in the kernel or respective module, + exposed via ``/sys/kernel/kheaders.tar.xz`` + +By default the timestamp is the current time and in the case of +``kheaders`` the various files' modification times. This must +be overridden using the `KBUILD_BUILD_TIMESTAMP`_ variable. +If you are building from a git commit, you could use its commit date. The kernel does *not* use the ``__DATE__`` and ``__TIME__`` macros, and enables warnings if they are used. If you incorporate external |