From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AG47ELtAJcNtBomfOeVCHz7Cb3eXpMGDBXWQzvuag1ht3lpzhnffX5koa4BEispTCuHubreS5lf9 ARC-Seal: i=1; a=rsa-sha256; t=1520376523; cv=none; d=google.com; s=arc-20160816; b=oYjbLacFflPpNAxXdEG6hJpAgTfoAkCx1jbC8CEooPi8RuuZ9PoDGhEy3V1hpSfiVG O22DfFeqvWyo8y19wywOAD6XMJTTUWld0OJuZ1YXfpReqJWdIzxfBni6hAAN1VFmNWmR 1BqbEi2eVlEGoE0xU7FlVqsc1dPwNHKO+RTymh3MKsFUkT7KTJGx8UFcWggb73/CMJkW pqnDuGe10UCiOwthRYc5Jd9QlxJRHv3812yjxxbVwDlsyb1iffVMAHkhMr7eNea0JiGg Qw1j/7MkJPKDJ6t1JxVImW67JwzBFMQzniDeEdxuBLG3aFtkhuFacTbujKjb+ecForT2 G2iw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:subject:cc:to:from:date:arc-authentication-results; bh=Yvste6i3GR9/5p9d07wnFoQlWNOO1pt5djFDHNgm6s8=; b=XW2GI6wwaE+dez44z8nayrH2pKqPC+84IXeRLMtuYk4Etvn2eyPMG4FPBF9sHYkugR i+L1MgkFfasUGJzu9toFrdgZqJ+l/Y/H+bTWD91Zyk0cS2yIROeYjMRH2a+37tXiDBbp 7s7HcpWgM+YyQq34mlaVc+0oK+wUil/XZ7Xx2e4irfJqx4BQC28glhD783P+wUAM0+Lv Ql25ECQB8NmqohfI1wFvYInIBiixfqlSXJ0iX5nXbLs18wQkxS1DzXuEWvq8lXZymik7 Didsrz53EVvvjAMI49Ns8UkM4iLTrce8/pvwBVlSYKZvLk8KSoQQRxW/y+H1O6BMCO4M sQYA== ARC-Authentication-Results: i=1; mx.google.com; spf=softfail (google.com: domain of transitioning akpm@linux-foundation.org does not designate 104.133.9.71 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org Authentication-Results: mx.google.com; spf=softfail (google.com: domain of transitioning akpm@linux-foundation.org does not designate 104.133.9.71 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org Date: Tue, 6 Mar 2018 14:48:07 -0800 From: Andrew Morton To: Khalid Aziz Cc: benh@kernel.crashing.org, paulus@samba.org, mpe@ellerman.id.au, davem@davemloft.net, dave.hansen@linux.intel.com, bsingharora@gmail.com, nborisov@suse.com, aarcange@redhat.com, anthony.yznaga@oracle.com, mgorman@suse.de, linuxram@us.ibm.com, kirill.shutemov@linux.intel.com, dan.j.williams@intel.com, jack@suse.cz, ross.zwisler@linux.intel.com, gregkh@linuxfoundation.org, tglx@linutronix.de, mhocko@suse.com, n-horiguchi@ah.jp.nec.com, jglisse@redhat.com, henry.willard@oracle.com, aneesh.kumar@linux.vnet.ibm.com, khandual@linux.vnet.ibm.com, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, sparclinux@vger.kernel.org, Khalid Aziz Subject: Re: [PATCH v12 07/11] mm: Add address parameter to arch_validate_prot() Message-Id: <20180306144807.30915bcffe6e640c3ad6279c@linux-foundation.org> In-Reply-To: <349751cbd54fda6f4a223f941aa71bbfe7be77ce.1519227112.git.khalid.aziz@oracle.com> References: <349751cbd54fda6f4a223f941aa71bbfe7be77ce.1519227112.git.khalid.aziz@oracle.com> X-Mailer: Sylpheed 3.6.0 (GTK+ 2.24.31; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1593031745545119756?= X-GMAIL-MSGID: =?utf-8?q?1594230333453251501?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: On Wed, 21 Feb 2018 10:15:49 -0700 Khalid Aziz wrote: > A protection flag may not be valid across entire address space and > hence arch_validate_prot() might need the address a protection bit is > being set on to ensure it is a valid protection flag. For example, sparc > processors support memory corruption detection (as part of ADI feature) > flag on memory addresses mapped on to physical RAM but not on PFN mapped > pages or addresses mapped on to devices. This patch adds address to the > parameters being passed to arch_validate_prot() so protection bits can > be validated in the relevant context. > > Signed-off-by: Khalid Aziz > Cc: Khalid Aziz > Reviewed-by: Anthony Yznaga Acked-by: Andrew Morton