Add installation instructions qnx4 and qnx6 filesystem types as kerne…

…l modules.

README.md

@@ -1,2 +1,73 @@
 # qnx-modules-dkms
 QNX FileSystem Kernel Modules (qnx-modules-dkms)
+
+This project installs qnx4 and qnx6 filesystem types as kernel modules.
+
+Available on the AUR QNX Modules DKMS
+
+```bash
+git clone https://github.com/sickcodes/qnx-modules-dkms.git
+cd qnx-modules-dkms
+
+cd ./qnx4
+make
+cd ..
+
+
+cd ./qnx6
+make
+cd ..
+
+mkdir -p /usr/src/qnx4/
+mkdir -p /usr/src/qnx6/
+
+cp -r ./qnx4/* /usr/src/qnx4/
+cp -r ./qnx6/* /usr/src/qnx6/
+
+tee -a /usr/lib/modules-load.d/qnx4.conf <<< qnx4
+tee -a /usr/lib/modules-load.d/qnx6.conf <<< qnx6
+
+```
+
+Check if your current kernel has `CONFIG_QNX4FS_FS` or `CONFIG_QNX6FS_FS`, which it most likely will not.
+
+```bash
+zcat /proc/config.gz | grep QNX
+# CONFIG_QNX4FS_FS is not set
+# CONFIG_QNX6FS_FS is not set
+```
+
+# Internal use-only
+
+Update the kernel sources, if ever.
+
+```bash
+# prepare existing tree
+git clone https://github.com/sickcodes/qnx-modules-dkms.git
+
+# QNX4_MAKEFILE="$(<./qnx-modules-dkms/qnx6/Makefile)"
+# QNX6_MAKEFILE="$(<./qnx-modules-dkms/qnx6/Makefile)"
+
+rm -rf ./qnx-modules-dkms/qnx4
+rm -rf ./qnx-modules-dkms/qnx6
+
+# copy linux ./linux/fs/qnx4 and ./linux/fs/qnx6 from linux git
+git clone --depth 1 https://github.com/torvalds/linux.git
+
+cp -ra ./linux/fs/qnx4 ./qnx-modules-dkms/
+cp -ra ./linux/fs/qnx6 ./qnx-modules-dkms/
+
+rm -rf ./linux
+
+# # use the kernel module Makefiles
+# cat <<< "${QNX4_MAKEFILE}" >./qnx-modules-dkms/qnx4/Makefile
+# cat <<< "${QNX6_MAKEFILE}" >./qnx-modules-dkms/qnx6/Makefile
+
+tee -a ./qnx-modules-dkms/qnx4/dkms.conf <<< qnx4
+tee -a ./qnx-modules-dkms/qnx6/dkms.conf <<< qnx6
+
+# restore the modified OOT Makefiles
+git restore ./qnx-modules-dkms/qnx4/Makefile
+git restore ./qnx-modules-dkms/qnx6/Makefile
+
+```