Messages in this thread Patch in this message | | | Date | Wed, 10 Sep 2014 12:09:15 -0400 | From | Matthew Wilcox <> | Subject | [RFC] Making more drivers compile on x86 |
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In Chicago, there was a brief discussion about making more drivers compile on architectures where there was no possible way they could run (since the relevant hardware does not exist for those platforms).
I have recently needed to compile-test axonram and dcssblk, which rely on hardware unique to powerpc and s390, respectively. As promised in the discussion, here is the patch I use to do that. Since it was for my own purposes, I didn't do anything fancy like wrap the faked parts in #ifdef COMPILE_TEST.
Hopefully this will be useful grist for the mill. Looking the patch over, if I were proposing something to be merged, I think I'd make much more use of prototypes, and less of macros. It would probably also make sense to put extmem in asm-generic, rather than replicate it for each architecture that wants to have a more "full" compile test.
--- /dev/null 2013-12-18 16:49:55.714859099 -0500 +++ b/arch/x86/include/asm/extmem.h 2013-12-19 16:49:44.000000000 -0500 @@ -0,0 +1,10 @@ +#define SEGMENT_EXCLUSIVE 1 +#define SEG_TYPE_ER 2 +#define SEGMENT_SHARED 3 +#define SEG_TYPE_SR 4 +#define SEG_TYPE_SC 5 +#define segment_warning(x, y) do { } while (0) +int segment_load(char *x, int y, unsigned long *z, unsigned long *a); +#define segment_unload(x) do { } while (0) +#define segment_modify_shared(x, y) 0 +#define segment_save(x) do { } while (0) diff --git a/arch/x86/include/asm/prom.h b/arch/x86/include/asm/prom.h index fbeb06e..dc6191f 100644 --- a/arch/x86/include/asm/prom.h +++ b/arch/x86/include/asm/prom.h @@ -37,6 +37,11 @@ static inline void x86_dtb_init(void) { } #define of_ioapic 0 #endif +#define _PAGE_NO_CACHE 1 +#define NO_IRQ 2 +extern int of_address_to_resource(void *x, int y, struct resource *z); +#define irq_of_parse_and_map(x, y) 0 + extern char cmd_line[COMMAND_LINE_SIZE]; #endif /* __ASSEMBLY__ */
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