=== How to build a kernel with src.rpm

  1. install kernel-$version.src.rpm; cd rpmbuild/
  2. rpmbuild -bp SPECS/kernel.spec
  3. If you want to add a patch, cp your.patch SOURCES/linux-kernel-test.patch
  4. uncomment # %define buildid .local and change local to you summary
  5. dnf install -y flex bison bc gcc elfutils-libelf-devel elfutils-devel openssl-devel dwarves vim clang llvm git
  6. dnf install -y libpcap-devel python3-docutils
  7. rpmbuild -bb –target=uname -m –without debug –without doc –without
    headers –without perf –without debuginfo –without tools SPECS/kernel.spec

=== How to build a RHEL kernel

  1. make rh-configs
  2. cp redhat/configs/kernel-3.10.0-x86_64.config .config
  3. make oldconfig
  4. make -j28
  5. make rh-check-kabi Or redhat/kabi/check-kabi -k redhat/kabi/Module.kabi_x86_64 -s Module.symvers

=== How to build a kernel

  1. git clone git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git
  2. cd net-next
  3. git am 0001-net-ipv6…. (attached patch)
  4. make menuconfig (just exit and save)
  5. make -j4
  6. make modules_install -j4
  7. make install
  8. cd /boot/
  9. dracut -f initramfs-3.11.0-rc6+.img 3.11.0-rc6+ (# ls /lib/modules/3.11.0-rc6+/)
  10. update your grub to boot the correct kernel
  11. reboot

If you want to rename the kernel, add a name in .config CONFIG_LOCALVERSION

=== How to build a driver

  1. install kernel devel package
  2. cd rpmbuild/BUILD/kernel-3.10.0-64.el7/linux-3.10.0-64.el7.x86_64/drivers/infiniband/ulp/ipoib/
  3. make -C /usr/src/kernels/3.10.0-64.el7.x86_64/ M=${PWD} modules

Or build an upstream kernel driver with clang

make -j28 scripts prepare modules_prepare CC=clang make -C . M=drivers/net/wireguard/ CC=clang

[1] https://www.kernel.org/doc/html/latest/kbuild/modules.html [2] https://www.kernel.org/doc/html/latest/kbuild/llvm.html