From mboxrd@z Thu Jan 1 00:00:00 1970 From: yalin.wang2010@gmail.com (yalin wang) Date: Sun, 30 Aug 2015 14:19:59 +0800 Subject: [PATCH] arm64: add kc_offset_to_vaddr and kc_vaddr_to_offset macro Message-ID: <1440915599-18485-1-git-send-email-yalin.wang2010@gmail.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org This patch add kc_offset_to_vaddr() and kc_vaddr_to_offset(), the default version doesn't work on arm64, because arm64 kernel address is below the PAGE_OFFSET, like module address and vmemmap address are all below PAGE_OFFSET address. Signed-off-by: yalin wang --- arch/arm64/include/asm/pgtable.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index d374191..ef1ed5c 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -660,6 +660,8 @@ static inline void update_mmu_cache(struct vm_area_struct *vma, #define update_mmu_cache_pmd(vma, address, pmd) do { } while (0) +#define kc_vaddr_to_offset(v) ((v) & ((1UL << VA_BITS) - 1)) +#define kc_offset_to_vaddr(o) ((o) | ~((1UL << VA_BITS) - 1)) #endif /* !__ASSEMBLY__ */ #endif /* __ASM_PGTABLE_H */ -- 1.9.1