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| author | Nicolas Schier <nsc@kernel.org> | 2026-09-28 19:26:58 +0200 |
|---|---|---|
| committer | Nathan Chancellor <nathan@kernel.org> | 2026-09-29 22:40:23 +0200 |
| commit | 33bef82263082e81406ef5662de2900e24038a78 (patch) | |
| tree | d323a521d336c77324b8fd27ff3675569da49e8b /Documentation/driver-api | |
| parent | 14e2c1f5431a03478ed4bbf2e72298c769f375ac (diff) | |
| download | linux-next-33bef82263082e81406ef5662de2900e24038a78.tar.gz linux-next-33bef82263082e81406ef5662de2900e24038a78.zip | |
kbuild: Move gen_init_cpio and gen_initramfs.sh to scripts/
gen_init_cpio and gen_initramfs.sh are part of kbuild and required for
all kernel builds w/ CONFIG_BLK_DEV_INITRD. Move both to scripts/ to be
more clear about their importance.
Link: https://lore.kernel.org/all/aSdrCFkUQup3qb-q@derry.ads.avm.de/
Reviewed-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Nicolas Schier <nsc@kernel.org>
Link: https://patch.msgid.link/20260928-move-gen_init_cpio-to-scripts-v4-2-f437a33c40ac@kernel.org
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Diffstat (limited to 'Documentation/driver-api')
| -rw-r--r-- | Documentation/driver-api/early-userspace/early_userspace_support.rst | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/Documentation/driver-api/early-userspace/early_userspace_support.rst b/Documentation/driver-api/early-userspace/early_userspace_support.rst index 60d1e1bc9413..1070f82e3578 100644 --- a/Documentation/driver-api/early-userspace/early_userspace_support.rst +++ b/Documentation/driver-api/early-userspace/early_userspace_support.rst @@ -55,9 +55,9 @@ user root (0). INITRAMFS_ROOT_GID can be set to a group ID that needs to be mapped to group root (0). A source file must be directives in the format required by the -usr/gen_init_cpio utility (run 'usr/gen_init_cpio -h' to get the +scripts/gen_init_cpio utility (run 'scripts/gen_init_cpio -h' to get the file format). The directives in the file will be passed directly to -usr/gen_init_cpio. +scripts/gen_init_cpio. When a combination of directories and files are specified then the initramfs image will be an aggregate of all of them. In this way a user @@ -69,17 +69,17 @@ early userspace image can be built by an unprivileged user. As a technical note, when directories and files are specified, the entire CONFIG_INITRAMFS_SOURCE is passed to -usr/gen_initramfs.sh. This means that CONFIG_INITRAMFS_SOURCE +scripts/gen_initramfs.sh. This means that CONFIG_INITRAMFS_SOURCE can really be interpreted as any legal argument to gen_initramfs.sh. If a directory is specified as an argument then the contents are scanned, uid/gid translation is performed, and -usr/gen_init_cpio file directives are output. If a file is -specified as an argument to usr/gen_initramfs.sh then the +scripts/gen_init_cpio file directives are output. If a file is +specified as an argument to scripts/gen_initramfs.sh then the contents of the file are simply copied to the output. All of the output directives from directory scanning and file contents copying are -processed by usr/gen_init_cpio. +processed by scripts/gen_init_cpio. -See also 'usr/gen_initramfs.sh -h'. +See also 'scripts/gen_initramfs.sh -h'. Where's this all leading? ========================= @@ -142,7 +142,7 @@ b) some device and filesystem drivers built as modules and stored in an c) using initramfs. The call to prepare_namespace() must be skipped. This means that a binary must do all the work. Said binary can be stored - into initramfs either via modifying usr/gen_init_cpio.c or via the new + into initramfs either via modifying scripts/gen_init_cpio.c or via the new initrd format, an cpio archive. It must be called "/init". This binary is responsible to do all the things prepare_namespace() would do. |