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coccinelle.txt: update documentation to include M= option

Adding documentation for the new M= option which limits Coccinelle
to a specific set of directories.

Signed-off-by: Greg Dietsche <>
Acked-by: Julia Lawall <>
Signed-off-by: Michal Marek <>
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1 parent d0bc1fb commit f95ab20972cfefa8ee5428d6c3afd4cb8eacabf4 @farmergreg farmergreg committed with michal42 Nov 6, 2011
Showing with 8 additions and 2 deletions.
  1. +8 −2 Documentation/coccinelle.txt
@@ -102,9 +102,15 @@ or
make coccicheck COCCI=<my_SP.cocci> MODE=report
- Using Coccinelle on (modified) files
+ Controlling Which Files are Processed by Coccinelle
+By default the entire kernel source tree is checked.
+To apply Coccinelle to a specific directory, M= can be used.
+For example, to check drivers/net/wireless/ one may write:
+ make coccicheck M=drivers/net/wireless/
To apply Coccinelle on a file basis, instead of a directory basis, the
following command may be used:

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