8. RedHat编译安装内核（英文）

8.1. Get source code

You Should be RedHat’s customer/partner to have source code access right.

wget URL

There will be kernel-alt-4.14.0-115.el7a.src.rpm at current dir when download successfuly.

8.2. Extract archive

rpm2cpio kernel-alt-4.14.0-115.el7a.src.rpm | cpio -idmv
xz -d linux-4.14.0-115.el7a.tar.xz
tar -xf linux-4.14.0-115.el7a.tar
cd linux-4.14.0-115.el7a/

8.3. Apply patch

Since having bugs to fix, we need to make some changes base on RedHat’s release. You may skip this step if you just want to build the kernel. Assuming patches are at ~/patch/ Do following commands under linux-4.14.0-115.el7a/ by order

git apply ~/patch/0001-net-hns3-remove-hns3_fill_desc_tso.patch
git apply ~/patch/0002-net-hns3-move-DMA-map-into-hns3_fill_desc.patch
git apply ~/patch/0003-net-hns3-add-handling-for-big-TX-fragment.patch
git apply ~/patch/0004-net-hns3-rename-hns_nic_dma_unmap.patch
git apply ~/patch/0005-net-hns3-fix-for-multiple-unmapping-DMA-problem.patch
git apply ~/patch/0006-net-hns3-Fix-for-packet-buffer-setting-bug.patch
git apply ~/patch/0007-net-hns3-getting-tx-and-dv-buffer-size-through-firmw.patch
git apply ~/patch/0008-net-hns3-aligning-buffer-size-in-SSU-to-256-bytes.patch
git apply ~/patch/0009-net-hns3-fix-a-SSU-buffer-checking-bug.patch
git apply ~/patch/0010-net-hns3-add-8-BD-limit-for-tx-flow.patch

8.4. Creat a .config file

Assuming you are build the kernel for current ARM64 system already had RedHat installed. Simply copy .config from /boot/config-xxx is ok.

cp /boot/config-4.14.0-115.el7a.aarch64 ./.config

Set CONFIG_SYSTEM_TRUSTED_KEYS empty at .config

CONFIG_SYSTEM_TRUSTED_KEYS=""

8.5. Get build script to build kernel

wget https://raw.githubusercontent.com/xin3liang/home-bin/master/build-kernel-natively.sh

set rpm name as you like by assign a value to LOCALVERSION

export LOCALVERSION="-liuxl-test-`date +%F`"

8.6. install dependence

yum install -y ncurses-devel make gcc bc bison flexelfutils-libelf-devel openssl-devel

8.7. Run script

chmod +x build-kernel-natively.sh
./build-kernel-natively.sh

After script top, there will be two files at ~/rpmbuild/RPMS/aarch64,looks like:

kernel-4.14.0_liuxl_test_2019_02_27-1.aarch64.rpm
kernel-headers-4.14.0_liuxl_test_2019_02_27-1.aarch64.rpm

8.8. Install new kernel

yum install kernel-4.14.0_liuxl_test_2019_02_27-1.aarch64.rpm

Reboot and choose the new kernel to start up