The patch: * bumps Linux kernel to version 6.18.8 * bumps U-Boot to version 2026.01 * forces check hashes Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com> [Julien: change linux.hash comment to use hash from upstream] Signed-off-by: Julien Olivain <ju.o@free.fr>