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| author | Benjamin Gray <bgray@linux.ibm.com> | 2023-06-06 08:17:41 +0200 |
|---|---|---|
| committer | Masahiro Yamada <masahiroy@kernel.org> | 2023-06-06 10:54:49 +0200 |
| commit | 7f8256ae0efba344a9b113036b1d545a1f6cdaa7 (patch) | |
| tree | 553f30049806cd86dc0bb6ff71904dcc0a78c73e /usr | |
| parent | kbuild: add $(CLANG_FLAGS) to KBUILD_CPPFLAGS (diff) | |
| download | linux-7f8256ae0efba344a9b113036b1d545a1f6cdaa7.tar.xz linux-7f8256ae0efba344a9b113036b1d545a1f6cdaa7.zip | |
initramfs: Encode dependency on KBUILD_BUILD_TIMESTAMP
gen_initramfs.sh has an internal dependency on KBUILD_BUILD_TIMESTAMP
for generating file mtimes that is not exposed to make, so changing
KBUILD_BUILD_TIMESTAMP will not trigger a rebuild of the archive.
Declare the mtime date as a new parameter to gen_initramfs.sh to encode
KBUILD_BUILD_TIMESTAMP in the shell command, thereby making make aware
of the dependency.
It will rebuild if KBUILD_BUILD_TIMESTAMP changes or is newly set/unset.
It will _not_ rebuild if KBUILD_BUILD_TIMESTAMP is unset before and
after. This should be fine for anyone who doesn't care about setting
specific build times in the first place.
Reviewed-by: Andrew Donnellan <ajd@linux.ibm.com>
Tested-by: Andrew Donnellan <ajd@linux.ibm.com>
Signed-off-by: Benjamin Gray <bgray@linux.ibm.com>
Reviewed-by: Nicolas Schier <n.schier@avm.de>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Diffstat (limited to 'usr')
| -rw-r--r-- | usr/Makefile | 1 | ||||
| -rwxr-xr-x | usr/gen_initramfs.sh | 16 |
2 files changed, 10 insertions, 7 deletions
diff --git a/usr/Makefile b/usr/Makefile index 59d9e8b07a01..f8e1ad19e05c 100644 --- a/usr/Makefile +++ b/usr/Makefile @@ -64,6 +64,7 @@ quiet_cmd_initfs = GEN $@ $(CONFIG_SHELL) $< -o $@ -l $(obj)/.initramfs_data.cpio.d \ $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \ $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID)) \ + $(if $(KBUILD_BUILD_TIMESTAMP), -d "$(KBUILD_BUILD_TIMESTAMP)") \ $(ramfs-input) # We rebuild initramfs_data.cpio if: diff --git a/usr/gen_initramfs.sh b/usr/gen_initramfs.sh index 63476bb70b41..14b5782f961a 100755 --- a/usr/gen_initramfs.sh +++ b/usr/gen_initramfs.sh @@ -23,6 +23,7 @@ $0 [-o <file>] [-l <dep_list>] [-u <uid>] [-g <gid>] {-d | <cpio_source>} ... -g <gid> Group ID to map to group ID 0 (root). <gid> is only meaningful if <cpio_source> is a directory. "squash" forces all files to gid 0. + -d <date> Use date for all file mtime values <cpio_source> File list or directory for cpio archive. If <cpio_source> is a .cpio file it will be used as direct input to initramfs. @@ -190,6 +191,7 @@ prog=$0 root_uid=0 root_gid=0 dep_list= +timestamp= cpio_list=$(mktemp ${TMPDIR:-/tmp}/cpiolist.XXXXXX) output="/dev/stdout" @@ -218,6 +220,13 @@ while [ $# -gt 0 ]; do [ "$root_gid" = "-1" ] && root_gid=$(id -g || echo 0) shift ;; + "-d") # date for file mtimes + timestamp="$(date -d"$1" +%s || :)" + if test -n "$timestamp"; then + timestamp="-t $timestamp" + fi + shift + ;; "-h") usage exit 0 @@ -237,11 +246,4 @@ done # If output_file is set we will generate cpio archive # we are careful to delete tmp files -timestamp= -if test -n "$KBUILD_BUILD_TIMESTAMP"; then - timestamp="$(date -d"$KBUILD_BUILD_TIMESTAMP" +%s || :)" - if test -n "$timestamp"; then - timestamp="-t $timestamp" - fi -fi usr/gen_init_cpio $timestamp $cpio_list > $output |