Author: Julia Lawall <julia@diku.dk> request_mem_region should be used with release_mem_region, not request_region. The semantic patch that fixes this problem is as follows: (http://coccinelle.lip6.fr/) // @r2@ expression start; @@ request_mem_region(start,…) @b2@ expression r2.start; @@ request_region(start,…) @depends on !b2@ expression r2.start; expression E; @@ – release_region + release_mem_region (start,E) // Signed-off-by: Julia Lawall Signed-off-by: David S. Miller …