From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751685AbbJLGxP (ORCPT ); Mon, 12 Oct 2015 02:53:15 -0400 Received: from mail-pa0-f51.google.com ([209.85.220.51]:33376 "EHLO mail-pa0-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751346AbbJLGxN (ORCPT ); Mon, 12 Oct 2015 02:53:13 -0400 From: yalin wang To: catalin.marinas@arm.com, will.deacon@arm.com, akpm@linux-foundation.org, kirill.shutemov@linux.intel.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: yalin wang Subject: [RFC] arm64: add kc_offset_to_vaddr and kc_vaddr_to_offset macro Date: Mon, 12 Oct 2015 14:52:59 +0800 Message-Id: <1444632779-23369-1-git-send-email-yalin.wang2010@gmail.com> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.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 4331d84..23070a8 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -658,6 +658,8 @@ 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) & ~VA_START) +#define kc_offset_to_vaddr(o) ((o) | VA_START) #endif /* !__ASSEMBLY__ */ #endif /* __ASM_PGTABLE_H */ -- 1.9.1