Ongoing notes for Madieu's book.

• How CONFIG_EXTRA_FIRMWARE_DIR is used.
• Difference between ARM toolchains.
• make xconfig (PKG_CONFIG_PATH)
• scripts/cleanfile

• /etc/modules-load.d/<filename>.conf
  • systemd-modules-load.service
  • man modules-load.d
• /etc/modprobe.d/

• IS_ERR(), IS_ERR_VALUE(), PTR_ERR(), more (err.h)
• console logging

• wait queues

• programmable interrupt timer (PIT)
• https://stackoverflow.com/questions/10812858/how-to-use-timers-in-linux-kernel-device-drivers
• https://lwn.net/Articles/735887/
• from_timer() [timer.h]