kernel compile ubuntu-21.04.txt

sudo apt-get update

sudo apt-get install build-essential vim git cscope libncurses-dev libssl-dev bison flex git-email -y

cd /

sudo mkdir /linux_work
cd /linux_work
sudo git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git linux_mainline

sudo git clone https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git linux_kselftest

sudo git clone git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git linux_stable

cd linux_stable
git checkout linux-5.12.y

sudo cp /boot/config-5.11.0-18-generic .config
#zcat /proc/config.gz > .config

in virtual machine commenting line CONFIG_SYSTEM_TRUSTED_KEYS in .config

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sudo make oldconfig
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lsmod > /tmp/my-lsmod
sudo make LSMOD=/tmp/my-lsmod localmodconfig
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sudo apt-get install libelf-dev dwarves -y

sudo make -j6 all

sudo dmesg -t > dmesg_current
sudo dmesg -t -k > dmesg_kernel
sudo dmesg -t -l emerg > dmesg_current_emerg
sudo dmesg -t -l alert > dmesg_current_alert
sudo dmesg -t -l crit > dmesg_current_crit
sudo dmesg -t -l err > dmesg_current_err
sudo dmesg -t -l warn > dmesg_current_warn
sudo dmesg -t -l info > dmesg_current_info

sudo make modules_install install

sudo nano /etc/default/grub
GRUB_TIMEOUT=10
GRUB_CMDLINE_LINUX="earlyprintk=vga"

sudo update-grub

--->reinicia<---