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of: update kconfig unittest help

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Add more information about the impact the of unittests have on the
live devicetree and why the tests should only be enabled for developer
kernels.

Add information about processing the test output such that the
results are more complete and comprehendable.

Signed-off-by: Frank Rowand <frowand.list@gmail.com>
Link: https://lore.kernel.org/r/20230213185702.395776-4-frowand.list@gmail.com
Signed-off-by: Rob Herring <robh@kernel.org>
This commit is contained in:
Frank Rowand 2023-02-13 12:56:58 -06:00 committed by Rob Herring
parent 568a10bfff
commit f381b31a80
1 changed files with 13 additions and 1 deletions
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14
drivers/of/Kconfig
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@ -23,7 +23,19 @@ config OF_UNITTEST
that are executed once at boot time, and the results dumped to the
console.
If unsure, say N here, but this option is safe to enable.
This option should only be enabled for a development kernel. The tests
will taint the kernel with TAINT_TEST. The tests will cause ERROR and
WARNING messages to print on the console. The tests will cause stack
traces to print on the console. It is possible that the tests will
leave the devicetree in a corrupted state.
The unittest output will be verbose. Copy the output to a file
via capturing the console output or via the dmesg command. Process
this file with scripts/dtc/of_unittest_expect to reduce the
verbosity, test whether expected output is present, and to
summarize the results.
If unsure, say N here. This option is not safe to enable.
config OF_ALL_DTBS
bool "Build all Device Tree Blobs"