From patchwork Fri Apr 29 13:25:29 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Ellerman X-Patchwork-Id: 616762 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [103.22.144.68]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3qxF702W2cz9sBf for ; Fri, 29 Apr 2016 23:34:52 +1000 (AEST) Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 3qxF6z75SZzDrFJ for ; Fri, 29 Apr 2016 23:34:51 +1000 (AEST) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Received: from ozlabs.org (ozlabs.org [IPv6:2401:3900:2:1::2]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3qxDxg6N4vzDqBM for ; Fri, 29 Apr 2016 23:26:47 +1000 (AEST) Received: by ozlabs.org (Postfix) id 3qxDxg5X9pz9t4b; Fri, 29 Apr 2016 23:26:47 +1000 (AEST) Delivered-To: linuxppc-dev@ozlabs.org Received: by ozlabs.org (Postfix, from userid 1034) id 3qxDxg3ttmz9t7n; Fri, 29 Apr 2016 23:26:47 +1000 (AEST) From: Michael Ellerman To: Subject: [PATCH v3 06/70] powerpc/mm: Use pte_raw() in pte_same()/pmd_same() Date: Fri, 29 Apr 2016 23:25:29 +1000 Message-Id: <1461936393-10131-6-git-send-email-mpe@ellerman.id.au> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1461936393-10131-1-git-send-email-mpe@ellerman.id.au> References: <1461936393-10131-1-git-send-email-mpe@ellerman.id.au> X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Paul Mackerras , aneesh.kumar@linux.vnet.ibm.com MIME-Version: 1.0 Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" We can avoid doing endian conversions by using pte_raw() in pxx_same(). The swap of the constant (_PAGE_HPTEFLAGS) should be done at compile time by the compiler. Signed-off-by: Michael Ellerman --- arch/powerpc/include/asm/book3s/64/hash-64k.h | 2 +- arch/powerpc/include/asm/book3s/64/hash.h | 6 +++++- 2 files changed, 6 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/include/asm/book3s/64/hash-64k.h b/arch/powerpc/include/asm/book3s/64/hash-64k.h index 0a7956a80a08..f4949f117057 100644 --- a/arch/powerpc/include/asm/book3s/64/hash-64k.h +++ b/arch/powerpc/include/asm/book3s/64/hash-64k.h @@ -272,7 +272,7 @@ static inline pmd_t pmd_mknotpresent(pmd_t pmd) #define __HAVE_ARCH_PMD_SAME static inline int pmd_same(pmd_t pmd_a, pmd_t pmd_b) { - return (((pmd_val(pmd_a) ^ pmd_val(pmd_b)) & ~_PAGE_HPTEFLAGS) == 0); + return (((pmd_raw(pmd_a) ^ pmd_raw(pmd_b)) & ~cpu_to_be64(_PAGE_HPTEFLAGS)) == 0); } static inline int __pmdp_test_and_clear_young(struct mm_struct *mm, diff --git a/arch/powerpc/include/asm/book3s/64/hash.h b/arch/powerpc/include/asm/book3s/64/hash.h index 7fc1a9a8169a..22064bd329f2 100644 --- a/arch/powerpc/include/asm/book3s/64/hash.h +++ b/arch/powerpc/include/asm/book3s/64/hash.h @@ -372,7 +372,11 @@ static inline int pgd_bad(pgd_t pgd) } #define __HAVE_ARCH_PTE_SAME -#define pte_same(A,B) (((pte_val(A) ^ pte_val(B)) & ~_PAGE_HPTEFLAGS) == 0) +static inline int pte_same(pte_t pte_a, pte_t pte_b) +{ + return (((pte_raw(pte_a) ^ pte_raw(pte_b)) & ~cpu_to_be64(_PAGE_HPTEFLAGS)) == 0); +} + static inline unsigned long pgd_page_vaddr(pgd_t pgd) { return (unsigned long)__va(pgd_val(pgd) & ~PGD_MASKED_BITS);