tree 161590c73691e744b176decedd41504d4de6f4c4
parent 941b10fab2cbd90ac7ad6bc2338ffe30e1d3ce53
author Julia Lawall <julia@diku.dk> 1255761279 +0200
committer Len Brown <len.brown@intel.com> 1257460257 -0500

ACPI: Move dereference after NULL test

If the NULL test on pr is needed, then the dereference should be after the
NULL test.

A simplified version of the semantic match that detects this problem is as
follows (http://coccinelle.lip6.fr/):

// <smpl>
@match exists@
expression x, E;
identifier fld;
@@

* x->fld
  ... when != \(x = E\|&x\)
* x == NULL
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>