* [PATCH] Documentation: kbuild: Add initramfs into reproducible builds document
@ 2020-10-12 9:35 jouni.hogander
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From: jouni.hogander @ 2020-10-12 9:35 UTC (permalink / raw)
To: linux-doc; +Cc: linux-kbuild, corbet, masahiroy, dvyukov, Jouni Hogander
From: Jouni Hogander <jouni.hogander@unikie.com>
Initramfs configuration has impact on build being reproducible
Signed-off-by: Jouni Hogander <jouni.hogander@unikie.com>
---
Documentation/kbuild/reproducible-builds.rst | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/Documentation/kbuild/reproducible-builds.rst b/Documentation/kbuild/reproducible-builds.rst
index 3b25655e441b..559700531a48 100644
--- a/Documentation/kbuild/reproducible-builds.rst
+++ b/Documentation/kbuild/reproducible-builds.rst
@@ -119,6 +119,14 @@ To avoid this, you can make the vDSO different for different
kernel versions by including an arbitrary string of "salt" in it.
This is specified by the Kconfig symbol ``CONFIG_BUILD_SALT``.
+Initial RAM Filesystem
+----------------------
+
+If ``CONFIG_BLK_DEV_INITRD`` is enabled and ``CONFIG_INITRAMFS_SOURCE``
+doesn't contain gzipped cpio archive, an initramfs is generated during
+build. To avoid this provide gzipped cpio archive via
+``CONFIG_INITRAMFS_SOURCE``
+
.. _KBUILD_BUILD_TIMESTAMP: kbuild.html#kbuild-build-timestamp
.. _KBUILD_BUILD_USER and KBUILD_BUILD_HOST: kbuild.html#kbuild-build-user-kbuild-build-host
.. _KCFLAGS: kbuild.html#kcflags
--
2.17.1
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