Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754733AbbIACAS (ORCPT ); Mon, 31 Aug 2015 22:00:18 -0400 Received: from mail-pa0-f43.google.com ([209.85.220.43]:35584 "EHLO mail-pa0-f43.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754317AbbIACAR convert rfc822-to-8bit (ORCPT ); Mon, 31 Aug 2015 22:00:17 -0400 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2104\)) Subject: Re: [PATCH] arm64: add kc_offset_to_vaddr and kc_vaddr_to_offset macro From: yalin wang In-Reply-To: <1440915599-18485-1-git-send-email-yalin.wang2010@gmail.com> Date: Tue, 1 Sep 2015 10:00:04 +0800 Content-Transfer-Encoding: 8BIT Message-Id: <385BEB9B-288F-4898-8728-CC4948DF0907@gmail.com> References: <1440915599-18485-1-git-send-email-yalin.wang2010@gmail.com> To: Catalin Marinas , Will Deacon , Andrew Morton , "Kirill A. Shutemov" , ard.biesheuvel@linaro.org, Minchan Kim , fkan@apm.com, steve.capper@linaro.org, lauraa@codeaurora.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org X-Mailer: Apple Mail (2.2104) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1281 Lines: 35 Ping ? > On Aug 30, 2015, at 14:19, yalin wang wrote: > > 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 > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/