coccinelle: ifnullfree: handle various destroy functions

Extend ifnullfree to the various destroy functions that were recently
extended to tolerate NULL arguments.

Signed-off-by: Julia Lawall <[e-mail]>
Signed-off-by: Michal Marek <[e-mail]>

scripts/coccinelle/free/ifnullfree.cocci

···
   debugfs_remove_recursive(E);
 |
   usb_free_urb(E);
+|
+  kmem_cache_destroy(E);
+|
+  mempool_destroy(E);
+|
+  dma_pool_destroy(E);
 )
 
 @r depends on context || report || org @
···
 @@
 
 * if (E != NULL)
-*	\(kfree@p\|debugfs_remove@p\|debugfs_remove_recursive@p\|usb_free_urb@p\)(E);
+*	\(kfree@p\|debugfs_remove@p\|debugfs_remove_recursive@p\|
+*         usb_free_urb@p\|kmem_cache_destroy@p\|mempool_destroy@p\|
+*         dma_pool_destroy@p\)(E);
 
 @script:python depends on org@
 p << r.p;