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doc: add section about regulatory.db missing 

It was found that some distros do not ship with a regulatory.db file.
This is required to run some of the autotests, and if not found on the
system the kernel build will fail due to some of the IWD config
options which require regulatory.db.

The fix is to manually download regulatory.db from git.kernel.org and
place it in /lib/firmware.
This commit is contained in:
James Prestwood 2019-10-07 09:35:44 -07:00 committed by Denis Kenzior
parent aa94450edd
commit 3f13c4029a
1 changed files with 10 additions and 0 deletions
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doc/test-runner.txt
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@ -69,6 +69,16 @@ After that a default kernel with the required options can be built:
$ make -j$(nproc)
Note: If your host distribution does not contain a regulatory.db you may get an
error similar to this when building the kernel:
No rule to make target '/lib/firmware/regulatory.db'...
To fix this you must download the regulatory.db manually and place it in
/lib/firmware. This can be found here:
https://git.kernel.org/pub/scm/linux/kernel/git/sforshee/wireless-regdb.git
Note: To catch locking related issues the following set of kernel config
options may be useful: