On Apr 23, Chung-Lin Tang wrote: > On 2014/4/22 下午 11:35, Ezequiel Garcia wrote: > > On Apr 22, Tobias Klauser wrote: > >> On 2014-04-22 at 16:24:43 +0200, Ezequiel Garcia <ezequiel.garcia@xxxxxxxxxxxxxxxxxx> wrote: > >>> Hi Ley Foon, > >>> > >>> On Apr 18, Ley Foon Tan wrote: > >>>> +/* > >>>> + * PAGE_SHIFT determines the page size > >>>> + */ > >>>> +#define PAGE_SHIFT 12 > >>>> +#define PAGE_SIZE 4096 > >>>> +#define PAGE_MASK (~(PAGE_SIZE - 1)) > >>>> + > >>> > >>> How about something like this: > >>> > >>> /* PAGE_SHIFT determines the page size */ > >>> #define PAGE_SHIFT 12 > >>> #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) > >>> #define PAGE_MASK (~((1 << PAGE_SHIFT) - 1)) > >>> > >>> Otherwise, the PAGE_SIZE macro above produces some warnings, IIRC. > >> > >> AFAIR old nios2 GCC versions (the 4.1 version from Windriver, IIRC) > >> would complain about something like the above, that's the reason I added > >> an explicit value for PAGE_SIZE back then. > >> > > > > Other than being "pretty" the above fix is to remove a mismatch type > > warning. You can get rid of the warning in different ways: > > > > ifdef __ASSEMBLY__ > > define PAGE_SIZE 4096 > > else > > define PAGE_SIZE 4096UL > > endif > > > >> I assume with the new nios2 GCC this should no longer be necessary and > >> Ezequiel's fix should be fine. > > > > Speaking of GCC... is there a libc available to test this kernel port? > > (which I assume uses the generic syscall ABI) > > It's submitted to libc-alpha, also still review in progress. > Do you plan to support uclibc? -- Ezequiel García, Free Electrons Embedded Linux, Kernel and Android Engineering http://free-electrons.com -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
