Linux-5.10.85

Patches

Reference: 10.3. Linux-5.13.12. Against the book we use the long term kernel 5.10.85. First run  fixsrctree  inside the source tree:

fixsrctree -d .

This fixes nearly all pathes to be qLinux conform. However, some patterns like  /lib/modules  and  /usr/include  are not covered yet. Apply a patch to fix this:

patch -Np1 -i linux-5.10.85-qlnx-1-pathes.patch

Apply a patch to the sources tree to fix that some (included) files will not be found:

patch -Np1 -i linux-5.10.85-qlnx-2-missing-files.patch

Apply a patch to prevent an error during modules_install (the “depmode hack”):

patch -Np1 -i linux-5.10.85-qlnx-3-depmod-hack.patch

Unfortunately the  depmod.sh  script doesn't set this correct. This is required for older  depmod  versions, but our  depmod  is new enough and doesn't require it.

Apply a patch to fix the length parameter in string functions

patch -Np1 -i linux-5.10.85-qlnx-4-strn-length.patch

Apply a patch to fix the location of the /boot directory (this is  /qlnx/etc/.boot  in qLinux):

patch -Np1 -i linux-5.10.85-qlnx-5-boot.patch

To configure what  uname  returns have a look into  include/linux/uts.h ..

Configure the kernel:

make defconfig kvm_guest.config

The build process could be interrupted by missing (header) files inside the kernel source tree. Simply create symlinks to fulfill the requirements.

Build the kernel:

make INSTALL_MOD_PATH=/qlnx bzImage

Maybe the PKG_CONFIG_PATH have to be set to find the openssl header files. Additional  /libs/lib  have to be in the library search path (in  /qlnx/etc/ld-musl-x86_64.path ).

Install the modules:

make INSTALL_MOD_PATH=/qlnx install modules_install

Now, the  INSTALL_MOD_PATH  will not be recognized by  depmod , thus²⁾:

depmod -b "$INSTALL_MOD_PATH" 5.10.85

The new kernel version will be prefixed with a '+' sign, e.g. with  uname . This happens because our kernel is beyond the original .git status. It will be set in  scripts/setlocalversion .