linux kernel how to build

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

install kernel-$version.src.rpm; cd rpmbuild/
dnf install -y rpm-build
rpmbuild -bp SPECS/kernel.spec
If you want to add a patch, cp your.patch SOURCES/linux-kernel-test.patch
uncomment # %define buildid .local and change local to you summary
dnf install -y flex bison bc gcc elfutils-libelf-devel elfutils-devel openssl-devel dwarves vim clang llvm git ldd-devel
dnf install -y libpcap-devel python3-docutils
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

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

=== How to build a kernel

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

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

=== How to build a driver

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

Or build an upstream kernel driver with clang

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

Or only build a driver for testing:

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mkdir build_dir && cp config build_dir/.config
make ARCH=x86_64 mrproper
make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/net/bonding/

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