This patchset does some minor refactoring of cpio header magic checking and corrects documentation. Patches 4/5 and 5/5 allow cpio entry mtime preservation to be disabled via a new INITRAMFS_PRESERVE_MTIME Kconfig option. Changes since previous version: - curb enthusiasm in 1/5 commit message - add cover letter .../early-userspace/buffer-format.rst | 24 +++----- init/Kconfig | 10 ++++ init/Makefile | 3 + init/initramfs.c | 57 +++---------------- init/initramfs_mtime.c | 49 ++++++++++++++++ init/initramfs_mtime.h | 11 ++++ 6 files changed, 88 insertions(+), 66 deletions(-)