[PATCH v2 0/2] scripts: headers_install: avoid some reprocessing

[David Disseldorp <ddiss@suse.de>]

scripts/headers_install.sh is relatively inefficient: it parses/modifies
headers via unifdef and three sed invocations, with sed output
post-processed via grep in one case (user-space CONFIG_ leaks).

These patches attempt to improve simplicity and efficiency by merging
two sed calls and processing user-space CONFIG_ leak filters inline.

Output is unaffected, aside from one minor error string change:
 error: $INFILE: leak CONFIG_X to user-space
becomes...
 error: $INFILE:CONFIG_X leak to user-space

License and CONFIG leak checks have been manually tested via error
injection.

Changes since v1 RFC:
- accept $INFILE prefixes from e.g. make headers_install O=build_dir
  as reported by Oliver Sang / kernel test robot
- drop extra config filter variable and do it all inline in sed

David Disseldorp (2):
      scripts: headers_install: filter ignored configs via sed
      scripts: headers_install: avoid extra sed call for license check

 scripts/headers_install.sh | 74 ++++++++++++++++----------------------
 1 file changed, 31 insertions(+), 43 deletions(-)