----------------------------------
How I built an aufs-patched kernel
----------------------------------

- get kernel source
  = got 5.4.26 (latest longterm atm)
  $ getlinux 5.4.26 -x
- prepare kernel source
  = extract
  $ tar xf linux-5.4.26.tar.xz
  = actually, i got 5.4.25 like a day before 5.4.26 is release
  = got patch-5.4.25-26 and apply
  $ cd linux-5.4.25
  $ patch -p1 < ~/temp/patch-5.4.25-26
  = renamed the path as linux-5.4.26

- get the required aufsX
  = need aufs5 because i chose kernel v5
  $ git clone git://github.com/sfjro/aufs5-standalone.git
- prepare aufs5
  $ git checkout -b aufs5.4 origin/aufs5.4

- get aufs-util (for later use)
  $ git clone git://git.code.sf.net/p/aufs/aufs-util
- prepare aufs-util
  = aufs-util does not have exact kernel version (get closest lower)
  $ git checkout -b aufs-5.0 origin/aufs5.0

- apply patches in aufs5-standalone into linux
  = not all patches are required
  = refer to README in aufs5-standalone
  = i use method 1
  $ cd linux-5.4.26
  $ patch -p1 < ../aufs5-standalone/aufs5-kbuild.patch
  $ patch -p1 < ../aufs5-standalone/aufs5-base.patch
  $ patch -p1 < ../aufs5-standalone/aufs5-mmap.patch
  $ patch -p1 < ../aufs5-standalone/aufs5-standalone.patch
  = OR (in a single line command)
  $ for a in kbuild base mmap standalone ; do patch -p1 < ../aufs5-standalone/aufs5-$a.patch ; done
- need to copy some files
  = still in linux-5.4.26
  $ cp -av ../aufs5-standalone/Documentation/* Documentation/
  $ cp -av ../aufs5-standalone/fs/* fs/
  $ cp -av ../aufs5-standalone/include/uapi/linux/aufs_type.h include/uapi/linux/
- repack this for easy reuse
  = rename path as linux-5.4.26_aufs
  $ cd .. ; mv linux-5.4.26 linux-5.4.26_aufs
  $ cd linux-5.4.26_aufs
  $ packthis

- prepare to build
  = unpack to /usr/src
  $ cd /usr/src ; tar xf linux-5.4.26_aufs.tar.xz
- configure kernel
  $ cd linux-5.4.26_aufs
  = use make_kernel
  $ make_kernel -i -c
  = that will run make menuconfig
  = select aufs as module
- build kernel
  = use make_kernel
  $ make_kernel -x
  = wait...

- pack kernel (slackware)
  = use pack_kernel (duh!)
  $ pack_kernel --all
  = by default package will be at $HOME/temp