On Tue, 2021-11-23 at 15:49 -0800, Jakub Kicinski wrote: > On Tue, 23 Nov 2021 17:24:15 +0100 Johannes Berg wrote: > > > (*_replace_bits() seems to be useful, though) > > > > Indeed. > > > > Also as I said in my other mail, the le32/be32/... variants are > > tremendously useful, and they fundamentally cannot be expressed with the > > FIELD_GET() or field_get() macros. IMHO this is a clear advantage to the > > Can you elaborate? Well, the way I see it, the only advantage of FIELD_GET() is that it will auto-determine the type (based on the mask type.) This cannot work if you need be/le conversions, because the be/le type annotations are invisible to the compiler. So obviously you could write a BE32_FIELD_GET(), but then really that's equivalent to be32_get_bits() - note you you have to actually specify the type in the macro name. I guess in theory you could make macros where the type is an argument (like FIELD_GET_TYPE(be32, ...)), but I don't see how that gains anything. > > typed versions, and if you ask me we should get rid of the FIELD_GETand > > FIELD_PREP entirely - difficult now, but at least let's not propagate > > that? > > I don't see why. Just for being more regular, in the spirit of "there's exactly one correct way of doing it" :) johannes
