kbuild: pacman-pkg: hardcode module installation path

'make pacman-pkg' for architectures with device tree support (i.e., arm,
arm64, etc.) shows logs like follows:

Installing dtbs...
INSTALL

kbuild: pacman-pkg: hardcode module installation path

'make pacman-pkg' for architectures with device tree support (i.e., arm,
arm64, etc.) shows logs like follows:

Installing dtbs...
INSTALL /home/masahiro/linux/pacman/linux-upstream/pkg/linux-upstream/usr//lib/modules/6.14.0-rc6+/dtb/actions/s700-cubieboard7.dtb
INSTALL /home/masahiro/linux/pacman/linux-upstream/pkg/linux-upstream/usr//lib/modules/6.14.0-rc6+/dtb/actions/s900-bubblegum-96.dtb
INSTALL /home/masahiro/linux/pacman/linux-upstream/pkg/linux-upstream/usr//lib/modules/6.14.0-rc6+/dtb/airoha/en7581-evb.dtb
...

The double slashes ('//') between 'usr' and 'lib' are somewhat ugly.

Let's hardcode the module installation path because the package contents
should remain unaffected even if ${MODLIB} is overridden. Please note that
scripts/packages/{builddeb,kernel.spec} also hardcode the module
installation path.

With this change, the log will look better, as follows:

Installing dtbs...
INSTALL /home/masahiro/linux/pacman/linux-upstream/pkg/linux-upstream/usr/lib/modules/6.14.0-rc6+/dtb/actions/s700-cubieboard7.dtb
INSTALL /home/masahiro/linux/pacman/linux-upstream/pkg/linux-upstream/usr/lib/modules/6.14.0-rc6+/dtb/actions/s900-bubblegum-96.dtb
INSTALL /home/masahiro/linux/pacman/linux-upstream/pkg/linux-upstream/usr/lib/modules/6.14.0-rc6+/dtb/airoha/en7581-evb.dtb
...

Signed-off-by: Masahiro Yamada <[email protected]>
Acked-by: Thomas Weißschuh <[email protected]>
Reviewed-by: Nathan Chancellor <[email protected]>

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kheaders: use 'tar' instead of 'cpio' for copying files

The 'cpio' command is used solely for copying header files to the
temporary directory. However, there is no strong reason to use 'cpio'
for th

kheaders: use 'tar' instead of 'cpio' for copying files

The 'cpio' command is used solely for copying header files to the
temporary directory. However, there is no strong reason to use 'cpio'
for this purpose. For example, scripts/package/install-extmod-build
uses the 'tar' command to copy files.

This commit replaces the use of 'cpio' with 'tar' because 'tar' is
already used in this script to generate kheaders_data.tar.xz anyway.

Performance-wide, there is no significant difference between 'cpio'
and 'tar'.

[Before]

$ rm -fr kheaders; mkdir kheaders
$ time sh -c '
for f in include arch/x86/include
do
find "$f" -name "*.h"
done | cpio --quiet -pd kheaders
'
real 0m0.148s
user 0m0.021s
sys 0m0.140s

[After]

$ rm -fr kheaders; mkdir kheaders
$ time sh -c '
for f in include arch/x86/include
do
find "$f" -name "*.h"
done | tar -c -f - -T - | tar -xf - -C kheaders
'
real 0m0.098s
user 0m0.024s
sys 0m0.131s

Revert commit 69ef0920bdd3 ("Docs: Add cpio requirement to changes.rst")
because 'cpio' is not used anywhere else during the kernel build.
Please note that the built-in initramfs is created by the in-tree tool,
usr/gen_init_cpio, so it does not rely on the external 'cpio' command
at all.

Remove 'cpio' from the package build dependencies as well.

Signed-off-by: Masahiro Yamada <[email protected]>

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kbuild: pacman-pkg: provide versioned linux-api-headers package

The Arch Linux glibc package contains a versioned dependency on
"linux-api-headers". If the linux-api-headers package provided by
pacm

kbuild: pacman-pkg: provide versioned linux-api-headers package

The Arch Linux glibc package contains a versioned dependency on
"linux-api-headers". If the linux-api-headers package provided by
pacman-pkg does not specify an explicit version this dependency is not
satisfied.
Fix the dependency by providing an explicit version.

Fixes: c8578539deba ("kbuild: add script and target to generate pacman package")
Signed-off-by: Thomas Weißschuh <[email protected]>
Reviewed-by: Nathan Chancellor <[email protected]>
Signed-off-by: Masahiro Yamada <[email protected]>

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kbuild: add debug package to pacman PKGBUILD

Add a new debug package to the PKGBUILD for the pacman-pkg target. The
debug package includes the non-stripped vmlinux file with debug symbols
for kernel

kbuild: add debug package to pacman PKGBUILD

Add a new debug package to the PKGBUILD for the pacman-pkg target. The
debug package includes the non-stripped vmlinux file with debug symbols
for kernel debugging and profiling. The file is installed at
/usr/src/debug/${pkgbase}, with a symbolic link at
/usr/lib/modules/$(uname -r)/build/vmlinux. The debug package is built
by default.

Signed-off-by: Jose Fernandez <[email protected]>
Reviewed-by: Peter Jung <[email protected]>
Acked-by: Thomas Weißschuh <[email protected]>
Signed-off-by: Masahiro Yamada <[email protected]>

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kbuild: pacman-pkg: do not override objtree

objtree is defined and exported by the top-level Makefile. I prefer
not to override it.

There is no need to pass the absolute path of objtree. PKGBUILD c

kbuild: pacman-pkg: do not override objtree

objtree is defined and exported by the top-level Makefile. I prefer
not to override it.

There is no need to pass the absolute path of objtree. PKGBUILD can
detect it by itself.

Signed-off-by: Masahiro Yamada <[email protected]>
Acked-by:  Thomas Weißschuh <[email protected]>
Reviewed-by: Nathan Chancellor <[email protected]>
Reviewed-by: Christian Heusel <[email protected]>

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kbuild: pacman-pkg: move common commands to a separate function

All build and package functions share the following commands:

export MAKEFLAGS="${KBUILD_MAKEFLAGS}"
cd "${objtree}"

Factor out

kbuild: pacman-pkg: move common commands to a separate function

All build and package functions share the following commands:

export MAKEFLAGS="${KBUILD_MAKEFLAGS}"
cd "${objtree}"

Factor out the common code.

Signed-off-by: Masahiro Yamada <[email protected]>
Acked-by:  Thomas Weißschuh <[email protected]>
Reviewed-by: Nathan Chancellor <[email protected]>
Reviewed-by: Christian Heusel <[email protected]>

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kbuild: control extra pacman packages with PACMAN_EXTRAPACKAGES

Introduce the PACMAN_EXTRAPACKAGES variable in PKGBUILD to allow users
to specify which additional packages are built by the pacman-pk

kbuild: control extra pacman packages with PACMAN_EXTRAPACKAGES

Introduce the PACMAN_EXTRAPACKAGES variable in PKGBUILD to allow users
to specify which additional packages are built by the pacman-pkg target.

Previously, the api-headers package was always included, and the headers
package was included only if CONFIG_MODULES=y. With this change, both
headers and api-headers packages are included by default. Users can now
control this behavior by setting PACMAN_EXTRAPACKAGES to a
space-separated list of desired extra packages or leaving it empty to
exclude all.

For example, to build only the base package without extras:

make pacman-pkg PACMAN_EXTRAPACKAGES=""

Signed-off-by: Jose Fernandez <[email protected]>
Reviewed-by: Peter Jung <[email protected]>
Reviewed-by: Nathan Chancellor <[email protected]>
Tested-by: Nathan Chancellor <[email protected]>
Reviewed-by: Christian Heusel <[email protected]>
Tested-by: Christian Heusel <[email protected]>
Acked-by: Thomas Weißschuh <[email protected]>
Signed-off-by: Masahiro Yamada <[email protected]>

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kbuild: add script and target to generate pacman package

pacman is the package manager used by Arch Linux and its derivates.
Creating native packages from the kernel tree has multiple advantages:

*

kbuild: add script and target to generate pacman package

pacman is the package manager used by Arch Linux and its derivates.
Creating native packages from the kernel tree has multiple advantages:

* The package triggers the correct hooks for initramfs generation and
bootloader configuration
* Uninstallation is complete and also invokes the relevant hooks
* New UAPI headers can be installed without any manual bookkeeping

The PKGBUILD file is a modified version of the one used for the
downstream Arch Linux "linux" package.
Extra steps that should not be necessary for a development kernel have
been removed and an UAPI header package has been added.

Signed-off-by: Thomas Weißschuh <[email protected]>
Reviewed-by: Nathan Chancellor <[email protected]>
Tested-by: Nathan Chancellor <[email protected]>
Signed-off-by: Masahiro Yamada <[email protected]>

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