On 10.07.2013, at 12:40, Alexander Graf wrote: > > On 10.07.2013, at 12:39, Benjamin Herrenschmidt wrote: > >> On Wed, 2013-07-10 at 12:33 +0200, Alexander Graf wrote: >>> >>> It's not exactly obvious that you're calling it with writing == 1 :). >>> Can you create a new local variable "is_write" in the calling >>> function, set that to 1 before the call to get_user_pages_fast and >>> pass it in instead of the 1? The compiler should easily optimize all >>> of that away, but it makes the code by far easier to read. >> >> Ugh ? >> >> Nobody else does that .... (look at futex :-) > > Yeah, that's fortunately code that I don't have to read :). The "proper" alternative would be to pass an enum for read/write into the function rather than an int. But that'd be a pretty controversial, big change that I'd rather not put on Alexey. With a local variable we're nicely self-contained readable ;) Alex -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
