From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-f41.google.com (mail-wm0-f41.google.com [74.125.82.41]) by kanga.kvack.org (Postfix) with ESMTP id 236FF6B025F for ; Wed, 30 Mar 2016 10:46:24 -0400 (EDT) Received: by mail-wm0-f41.google.com with SMTP id r72so102916173wmg.0 for ; Wed, 30 Mar 2016 07:46:24 -0700 (PDT) Received: from mail-wm0-x231.google.com (mail-wm0-x231.google.com. [2a00:1450:400c:c09::231]) by mx.google.com with ESMTPS id qs3si5601164wjc.230.2016.03.30.07.46.22 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 30 Mar 2016 07:46:23 -0700 (PDT) Received: by mail-wm0-x231.google.com with SMTP id 191so92691279wmq.0 for ; Wed, 30 Mar 2016 07:46:22 -0700 (PDT) From: Ard Biesheuvel Subject: [PATCH v2 4/9] arm64: insn: avoid virt_to_page() translations on core kernel symbols Date: Wed, 30 Mar 2016 16:45:59 +0200 Message-Id: <1459349164-27175-5-git-send-email-ard.biesheuvel@linaro.org> In-Reply-To: <1459349164-27175-1-git-send-email-ard.biesheuvel@linaro.org> References: <1459349164-27175-1-git-send-email-ard.biesheuvel@linaro.org> Sender: owner-linux-mm@kvack.org List-ID: To: linux-arm-kernel@lists.infradead.org, catalin.marinas@arm.com, will.deacon@arm.com, linux-mm@kvack.org, akpm@linux-foundation.org, nios2-dev@lists.rocketboards.org, lftan@altera.com, jonas@southpole.se, linux@lists.openrisc.net Cc: mark.rutland@arm.com, steve.capper@linaro.org, Ard Biesheuvel Before restricting virt_to_page() to the linear mapping, ensure that the text patching code does not use it to resolve references into the core kernel text, which is mapped in the vmalloc area. Signed-off-by: Ard Biesheuvel --- arch/arm64/kernel/insn.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/kernel/insn.c b/arch/arm64/kernel/insn.c index 7371455160e5..368c08290dd8 100644 --- a/arch/arm64/kernel/insn.c +++ b/arch/arm64/kernel/insn.c @@ -96,7 +96,7 @@ static void __kprobes *patch_map(void *addr, int fixmap) if (module && IS_ENABLED(CONFIG_DEBUG_SET_MODULE_RONX)) page = vmalloc_to_page(addr); else if (!module && IS_ENABLED(CONFIG_DEBUG_RODATA)) - page = virt_to_page(addr); + page = pfn_to_page(PHYS_PFN(__pa(addr))); else return addr; -- 2.5.0 -- 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