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The undefined logic is complex and has lots of magic on it.
Implement it, using the same algorithm we have at get_abi.pl. Yet,
some tweaks to optimize performance and to make the code simpler
were added here:
- at the perl version, the tree graph had loops, so we had to
use BFS to traverse it. On this version, the graph is a tree,
so, it simplifies the what group for sysfs aliases;
- the logic which splits regular expressions into subgroups
was re-written to make it faster;
- it may optionally use multiple processes to search for symbol
matches;
- it has some additional debug levels.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/1529c255845d117696d5af57d8dc05554663afdf.1739182025.git.mchehab+huawei@kernel.org
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