Add a target to use the Coccinelle checker

A 'coccicheck' target is added. It can be called with four different
modes. Each one generates a different kind of output, i.e. context,
patch, org, report, according to the corresponding mode to be
activated.

The new target calls the 'coccicheck' front-end in the 'scripts'
directory with the MODE argument. Every SmPL file in the
subdirectories of 'scripts/coccinelle' is then given to the front-end
and applied to the entire source tree.

The four modes behave as follows:

'report' generates a list in the following format:
  file:line:column-column: message

'patch' proposes a fix, when possible.

'context' highlights lines of interest and their context in a
diff-like style. Lines of interest are indicated with '-'.

'org' generates a report in the Org mode format of Emacs.

Signed-off-by: Nicolas Palix <npalix@diku.dk>
Signed-off-by: Julia Lawall <julia@diku.dk>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>

1 files changed, 7 insertions, 3 deletions

diff --git a/Makefile b/Makefile
index ea5f0bee1934..5a4bf98e83a5 100644
--- a/Makefile
+++ b/Makefile
@@ -412,7 +412,7 @@ endif
 # of make so .config is not included in this case either (for *config).
 
 no-dot-config-targets := clean mrproper distclean \
-                         cscope TAGS tags help %docs check% \
+                         cscope TAGS tags help %docs check% coccicheck \
                          include/linux/version.h headers_% \
                          kernelrelease kernelversion
 
@@ -1279,8 +1279,9 @@ help:
         @echo  '  includecheck    - Check for duplicate included header files'
         @echo  '  export_report   - List the usages of all exported symbols'
         @echo  '  headers_check   - Sanity check on exported headers'
-        @echo  '  headerdep       - Detect inclusion cycles in headers'; \
-         echo  ''
+        @echo  '  headerdep       - Detect inclusion cycles in headers'
+        @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
+        @echo  ''
         @echo  'Kernel packaging:'
         @$(MAKE) $(build)=$(package-dir) help
         @echo  ''
@@ -1439,6 +1440,9 @@ versioncheck:
                 -name '*.[hcS]' -type f -print | sort \
                 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
 
+coccicheck:
+        $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
+
 namespacecheck:
         $(PERL) $(srctree)/scripts/namespace.pl