sparc64: Define WANT_PAGE_VIRTUAL As sparse warns, without this struct page pointer subtraction is extremely expensive, and this is a pretty common operation in fast paths. With this define struct page becomes 64 bytes which makes for a simple subtract and shift, instead of a costly divide or reciprocol multiply. Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> --- arch/sparc/include/asm/page_64.h | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/arch/sparc/include/asm/page_64.h b/arch/sparc/include/asm/page_64.h index b579b91..4274ed1 100644 --- a/arch/sparc/include/asm/page_64.h +++ b/arch/sparc/include/asm/page_64.h @@ -38,6 +38,8 @@ #ifndef __ASSEMBLY__ +#define WANT_PAGE_VIRTUAL + extern void _clear_page(void *page); #define clear_page(X) _clear_page((void *)(X)) struct page; -- 1.5.6.5.GIT -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
