On Thu, Oct 26, 2017 at 02:10:19PM +0300, Dan Carpenter wrote: > On Thu, Oct 26, 2017 at 12:54:20PM +0200, Rasmus Villemoes wrote: > > On 26 October 2017 at 12:48, Dan Carpenter <dan.carpenter@xxxxxxxxxx> wrote: > > > On Wed, Oct 25, 2017 at 09:25:15PM +0200, Rasmus Villemoes wrote: > > >> For some reason this spits out an enourmous amount of false positives, > > >> making this entirely useless. We hit a lot of "%lx", (long)(a - b), > > >> but I don't understand why the a-b expression (a pointer difference) > > >> passes is_ptr_type(). > > > > > > Well, it is a pointer type. If you do pointer math, you get pointer > > > results. You can't really treat subtract different from addition > > > because container_of() is a subtraction. > > > > Huh? When I subtract one pointer from another, I get an _integer_. > > No. You still get a pointer. :P That's just how type promotion works > in C. > Wait... Maybe I'm wrong. Let me check how that works. regards, dan carpenter -- To unsubscribe from this list: send the line "unsubscribe smatch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
