backports: Use Coccinelle --relax-include-path

This will provide wider coverage on include paths for our Coccinelle
rule interpretation, at a very lower cost incurred, about 1 second,
for code generation. Coccinelle makes an effort to infer types but
with a wider coverage of header files it can do a better job at that.
You want to use both --recursive-includes (which we already enable) and
--relax-include-path to get the most possible type information.

You will want at least Coccinelle 1.0.0-rc20 which had an increase
of performance of over 30% when using both  --recursive-includes and
--relax-include path.

mcgrof@drvbp1 ~/backports (git::master)$ time ./gentree.py --clean
/home/mcgrof/linux-next /home/mcgrof/build/next-20140411
Copy original source files ...
Apply patches ...
Modify Kconfig tree ...
Rewrite Makefiles and Kconfig files ...
Done!

real    1m15.370s
user    10m47.232s
sys     0m36.980s

Cc: Peter Senna <peter.senna@gmail.com>
Cc: Julia Lawall <julia.lawall@lip6.fr>
Cc: Gilles Muller <Gilles.Muller@lip6.fr>
Signed-off-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>

diff --git a/lib/bpcoccinelle.py b/lib/bpcoccinelle.py
index bd276c7371df5ccbd2bf17a5ef2001ada746b78c..75a0b37eba88d1a78ad97710d291974b6c8883d7 100644 (file)
--- a/lib/bpcoccinelle.py
+++ b/lib/bpcoccinelle.py
@@ -33,6 +33,7 @@ def spatch(cocci_file, outdir,
            max_threads, thread_id, temp_dir, ret_q, extra_args=[]):
     cmd = ['spatch', '--sp-file', cocci_file, '--in-place',
             '--recursive-includes',
+            '--relax-include-path',
             '--use-coccigrep',
             '--backup-suffix', '.cocci_backup', '--dir', '.']