perl scripts/checkconfig.pl `find . -name '*.[chS]'`
This one not only adds "#include <linux/config.h>" to files where the
script says they're needed, but also removes them from all but two files
where it says they're extraneous (those two have #if 0'd code which uses
configuration options). The patch is available for your review at:
http://jpj.net/~trevor/linux/checkconfig-aggressive-2.1.84.diff.gz.bin
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Trevor Johnson