On Wed, Jan 21, 2009 at 01:24:25AM +0100, Arnd Bergmann wrote: ... > > This file needs to test for 64-bit'ness using some non-CONFIG_* > > test. And the standard built-in CPP macros which can be used > > to check for that are different on every platform. > > I think we should simply define a macro for use in the kernel, e.g. in > <asm/types.h>. There already is a BITS_PER_LONG macro in there, maybe > we can add an exported __BITS_PER_LONG there that checks for the right > macro on each architecture. I'm pretty sure __LP64__ is the standard compiler defined macro for 64-bit builds on most architectures. > On parisc, there is a major confusion in this area, at some point, all > checks for __LP64__ got replaced with CONFIG_64BIT there. While I have > not understood what the problem with __LP64__ was, IIRC, the problem with __LP64__ is it wasn't visible to the CONFIG tool chains and dependencies. I believe that's fixed now and parisc could deprecate use of CONFIG_64BIT if there is a strong preference for __LP64__. > the check for > CONFIG_64BIT on parisc user space looks very wrong. This shouldn't be exported to user space. Is that what you meant? PA-RISC user space can currently only be 32-bit anyway. So a 64-bit kernel will have to take that into consideration. thanks, grant -- To unsubscribe from this list: send the line "unsubscribe linux-parisc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
