Merge branch 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6

* 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6: (39 commits)
  Revert "namespace: add source file location exceptions"
  Coccinelle: Add contextual message
  Coccinelle: Fix documentation
  Coccinelle: Find doubled arguments to boolean or bit operators.
  Coccinelle: Find nested lock+irqsave functions that use the same flags variables.
  namespace: add source file location exceptions
  scripts/extract-ikconfig: add support for bzip2, lzma and lzo
  kbuild: check return value of asprintf()
  scripts/namespace.pl: improve to get more correct results
  scripts/namespace.pl: some bug fixes
  scripts/namespace.pl: update file exclusion list
  scripts/namespace.pl: fix wrong source path
  Coccinelle: Use the -no_show_diff option for org and report mode
  Coccinelle: Add a new mode named 'chain'
  Coccinelle: Use new comment format to explain kfree.cocci
  Coccinelle: Improve user information with a new kind of comment
  Coccinelle: Update documentation
  MAINTAINERS: Coccinelle: Update email address
  Documentation/kbuild: modules.txt cleanup
  Documentation/kbuild: major edit of modules.txt sections 5-8
  ...

1 files changed, 40 insertions, 0 deletions

diff --git a/scripts/coccinelle/api/memdup.cocci b/scripts/coccinelle/api/memdup.cocci
new file mode 100644
index 000000000000..b5d722077dc1
--- /dev/null
+++ b/scripts/coccinelle/api/memdup.cocci
@@ -0,0 +1,40 @@
+/// Use kmemdup rather than duplicating its implementation
+///
+// Confidence: High
+// Copyright: (C) 2010 Nicolas Palix, DIKU.  GPLv2.
+// Copyright: (C) 2010 Julia Lawall, DIKU.  GPLv2.
+// Copyright: (C) 2010 Gilles Muller, INRIA/LiP6.  GPLv2.
+// URL: http://coccinelle.lip6.fr/
+// Comments:
+// Options: -no_includes -include_headers
+
+virtual patch
+
+@r1@
+expression from,to;
+expression flag;
+position p;
+@@
+
+   to = \(kmalloc@p\|kzalloc@p\)(strlen(from) + 1,flag);
+
+@r2@
+expression x,from,to;
+expression flag,E1;
+position p;
+@@
+
+    x = strlen(from) + 1;
+    ... when != \( x = E1 \| from = E1 \)
+    to = \(kmalloc@p\|kzalloc@p\)(x,flag);
+
+@@
+expression from,to,size,flag;
+position p != {r1.p,r2.p};
+statement S;
+@@
+
+-  to = \(kmalloc@p\|kzalloc@p\)(size,flag);
++  to = kmemdup(from,size,flag);
+   if (to==NULL || ...) S
+-  memcpy(to, from, size);