From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qc0-f170.google.com (mail-qc0-f170.google.com [209.85.216.170]) by kanga.kvack.org (Postfix) with ESMTP id 980F86B0037 for ; Fri, 15 Aug 2014 07:44:29 -0400 (EDT) Received: by mail-qc0-f170.google.com with SMTP id x3so2206818qcv.1 for ; Fri, 15 Aug 2014 04:44:29 -0700 (PDT) Received: from mx1.redhat.com (mx1.redhat.com. [209.132.183.28]) by mx.google.com with ESMTPS id g5si11465318qge.57.2014.08.15.04.44.28 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 15 Aug 2014 04:44:29 -0700 (PDT) From: Frantisek Hrbata Subject: [PATCH V2 1/2] x86: add arch_pfn_possible helper Date: Fri, 15 Aug 2014 13:44:02 +0200 Message-Id: <1408103043-31015-2-git-send-email-fhrbata@redhat.com> In-Reply-To: <1408103043-31015-1-git-send-email-fhrbata@redhat.com> References: <1408025927-16826-1-git-send-email-fhrbata@redhat.com> <1408103043-31015-1-git-send-email-fhrbata@redhat.com> Sender: owner-linux-mm@kvack.org List-ID: To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, x86@kernel.org, oleg@redhat.com, kamaleshb@in.ibm.com, hechjie@cn.ibm.com, akpm@linux-foundation.org, dave.hansen@intel.com, dvlasenk@redhat.com, prarit@redhat.com, lwoodman@redhat.com, hannsj_uhl@de.ibm.com Add helper to check maximum possible pfn on x86. Also make the current phys_addr_valid helper using it internally. Signed-off-by: Frantisek Hrbata --- arch/x86/mm/physaddr.h | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/arch/x86/mm/physaddr.h b/arch/x86/mm/physaddr.h index a3cd5a0..9df8e3a 100644 --- a/arch/x86/mm/physaddr.h +++ b/arch/x86/mm/physaddr.h @@ -1,10 +1,15 @@ #include -static inline int phys_addr_valid(resource_size_t addr) +static inline int arch_pfn_possible(unsigned long pfn) { #ifdef CONFIG_PHYS_ADDR_T_64BIT - return !(addr >> boot_cpu_data.x86_phys_bits); + return !(pfn >> (boot_cpu_data.x86_phys_bits - PAGE_SHIFT)); #else return 1; #endif } + +static inline int phys_addr_valid(resource_size_t addr) +{ + return arch_pfn_possible(addr >> PAGE_SHIFT); +} -- 1.9.3 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org