PKGBUILDs/core/linux-rpi-legacy/linux-rpi-legacy.install

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disable_cma() {
if [[ -f /boot/config.txt && $(grep '^cma' /boot/config.txt) != '' ]]; then
echo ">>> You appear to have dynamic memory (CMA) enabled, which is currently broken"
echo ">>> in newer kernels and will cause many issues if left enabled."
echo ">>> Disabling that for you now."
sed -i 's/^cma_/#cma_/g' /boot/config.txt
fi
}
post_install () {
disable_cma
}
post_upgrade() {
if grep "^[^#]*[[:space:]]/boot" etc/fstab 2>&1 >/dev/null; then
if ! grep "[[:space:]]/boot" etc/mtab 2>&1 >/dev/null; then
echo "WARNING: /boot appears to be a separate partition but is not mounted."
echo " You probably just broke your system. Congratulations."
fi
fi
disable_cma
if [ "$(vercmp $2 3.18.3)" -lt 0 ]; then
echo "________________________________________________________________________________"
echo ""
echo "WARNING: This kernel provides updated config.txt and cmdline.txt files."
echo " Check for pacnew files in /boot and merge or replace the existing files"
echo " with the new versions."
echo "________________________________________________________________________________"
echo ""
fi
if [[ $(grep 'Raspberry Pi 4' /sys/firmware/devicetree/base/model) ]]; then
echo "________________________________________________________________________________"
echo ""
echo "WARNING: You must switch to a different kernel for the Raspberry Pi 4:"
echo " pacman -S linux-raspberrypi4"
echo "________________________________________________________________________________"
echo ""
fi
}
post_remove() {
rm -f boot/initramfs-linux.img
}