tree 4383a16168096e94919c980a2cbcd7a5e81c6492
parent 0fc251d9a6c9fb841b73f29dd73dcf91afe7883f
author Julia Lawall <julia@diku.dk> 1275693457 -0700
committer David S. Miller <davem@davemloft.net> 1275693457 -0700

arch/sparc/kernel: Eliminate what looks like a NULL pointer dereference

At the point of the test, action cannot be NULL, as it has been dereferenced
in the code just above.

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

// <smpl>
@r exists@
expression E,E1;
identifier f;
statement S1,S2,S3;
@@

if ((E == NULL && ...) || ...)
{
  ... when != if (...) S1 else S2
      when != E = E1
* E->f
  ... when any
}
else S3
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>