Joe Perches 5629411279 checkpatch: fix SPDX license check with --root=<path>
checkpatch uses the in-kernel script spdxcheck.py to validate the specific
license in a file or script.

This check can currently fail for a couple reasons:

o spdxcheck.py assumes the existence of git tree that may not
  exist for a bare source tree from something like a tarball
o the spdxcheck.py must be run from the top level root directory

So add a git existence test and set the subprocess subdirectory.

Link: http://lkml.kernel.org/r/2b32864324ae9c92948b002ec4c0c22409ed98f1.camel@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Reported-by: Charlemagne Lasse <charlemagnelasse@gmail.com>
Tested-by: Charlemagne Lasse <charlemagnelasse@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-08-22 10:52:49 -07:00
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