On Thu, 13 Nov 2014, Joe Perches wrote: > I added a checkpatch entry for this. > Maybe some cocci test like this would be useful? > > @@ > type t; > t *p; > @@ > - p == NULL > + !p > > @@ > type t; > t *p; > @@ > - p != NULL > + p > > @@ > type t; > t *p; > @@ > - NULL == p > + !p > > @@ > type t; > t *p; > @@ > - NULL != p > + p
This was discussed many years ago. I don't think that the change is desirable in all cases. There are functions like kmalloc where NULL means failure and !p seems like the reasonable choice. But there maybe other cases where NULL is somehow a meaningful value. Here is a link to the part of the discussion: https://lkml.org/lkml/2007/7/27/103 julia -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
