1. 根目录:
2. net
3. wireless
4. db.txt

#
# This file is a placeholder to prevent accidental build breakage if someone
# enables CONFIG_CFG80211_INTERNAL_REGDB.  Almost no one actually needs to
# enable that build option.
#
# You should be using CRDA instead.  It is even better if you use the CRDA
# package provided by your distribution, since they will probably keep it
# up-to-date on your behalf.
#
# If you _really_ intend to use CONFIG_CFG80211_INTERNAL_REGDB then you will
# need to replace this file with one containing appropriately formatted
# regulatory rules that cover the regulatory domains you will be using.  Your
# best option is to extract the db.txt file from the wireless-regdb git
# repository:
#
#   git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-regdb.git
#