On Sat, Apr 04, 2015 at 06:20:53PM +0200, Julia Lawall wrote: > Couldn't one say: > > x = NULL; > y = &x->whatever; > z = container_of(y, struct blah, whatever); > > and end up with z being NULL?
That is crazy person code. It looks deliberately wrong. If we start merging deliberate mistakes then we're already screwed. I have a smatch check which warns on container_of() but I should update it to not complain if it's the first struct member. I have looked at quite a few of these warnings and I worry that there are some places where it relies on container_of() to be a no-op... That's also crazy but it's the kind of crazy that people do in real life. :P regards, dan carpenter -- 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/
