On Sat, Jun 24, 2017 at 1:37 AM, Julia Lawall <julia.lawall@xxxxxxx> wrote: > > > On Sat, 24 Jun 2017, Frans Klaver wrote: > >> Hm. For some reason the great mail filtering scheme decided to push >> this past my inbox :-/ >> >> On Sat, Jun 17, 2017 at 12:44 AM, Joe Perches <joe@xxxxxxxxxxx> wrote: >> > On Fri, 2017-06-16 at 19:45 +0200, Frans Klaver wrote: >> >> The header field in struct pd_message is declared as an __le16 type. The >> >> data in the message is supposed to be little endian. This means we don't >> >> have to go and shift the individual bytes into position when we're >> >> filling the buffer, we can just copy the contents right away. As an >> >> added benefit we don't get fishy results on big endian systems anymore. >> > >> > Thanks for pointing this out. >> > >> > There are several instances of this class of error. >> >> There are other smells around __(le|be) types that show up in staging >> that might be worth checking in the rest of the kernel as well. e.g. >> converting to cpu and storing it back into itself (possibly with its >> bytes reversed), direct assignments without conversion and what else >> you might have. sparse obviously already flags anything fishy going on >> with these types, but cannot distinguish between the classes of >> errors. I'll need to acquaint myself with spatch a bit more to be able >> to track that down. > > If you have concrete code examples, even fake ones, illustrating a class > of problem, then that would be great. I'll see if I can produce some somewhere this week. Thanks, Frans _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
