From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e06smtp13.uk.ibm.com (e06smtp13.uk.ibm.com [195.75.94.109]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id C1EA71A0287 for ; Tue, 25 Nov 2014 22:43:41 +1100 (AEDT) Received: from /spool/local by e06smtp13.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 25 Nov 2014 11:43:37 -0000 Received: from b06cxnps4076.portsmouth.uk.ibm.com (d06relay13.portsmouth.uk.ibm.com [9.149.109.198]) by d06dlp01.portsmouth.uk.ibm.com (Postfix) with ESMTP id 2AC9017D8047 for ; Tue, 25 Nov 2014 11:43:51 +0000 (GMT) Received: from d06av11.portsmouth.uk.ibm.com (d06av11.portsmouth.uk.ibm.com [9.149.37.252]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id sAPBhZYx51511372 for ; Tue, 25 Nov 2014 11:43:35 GMT Received: from d06av11.portsmouth.uk.ibm.com (localhost [127.0.0.1]) by d06av11.portsmouth.uk.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id sAPBhZbL005698 for ; Tue, 25 Nov 2014 04:43:35 -0700 From: David Hildenbrand To: linuxppc-dev@lists.ozlabs.org, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [RFC 1/2] powerpc/fsl-pci: atomic get_user when pagefault_disabled Date: Tue, 25 Nov 2014 12:43:25 +0100 Message-Id: <1416915806-24757-2-git-send-email-dahi@linux.vnet.ibm.com> In-Reply-To: <1416915806-24757-1-git-send-email-dahi@linux.vnet.ibm.com> References: <1416915806-24757-1-git-send-email-dahi@linux.vnet.ibm.com> Cc: borntraeger@de.ibm.com, heiko.carstens@de.ibm.com, dahi@linux.vnet.ibm.com, paulus@samba.org, schwidefsky@de.ibm.com, akpm@linux-foundation.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Whenever we have pagefaults disabled, we have to use the atomic variants of (set|get)_user and copy_(from|to)_user. Signed-off-by: David Hildenbrand --- arch/powerpc/sysdev/fsl_pci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/sysdev/fsl_pci.c b/arch/powerpc/sysdev/fsl_pci.c index 65d2ed4..c0af4ef 100644 --- a/arch/powerpc/sysdev/fsl_pci.c +++ b/arch/powerpc/sysdev/fsl_pci.c @@ -1025,7 +1025,7 @@ int fsl_pci_mcheck_exception(struct pt_regs *regs) if (is_in_pci_mem_space(addr)) { if (user_mode(regs)) { pagefault_disable(); - ret = get_user(regs->nip, &inst); + ret = __get_user_inatomic(regs->nip, &inst); pagefault_enable(); } else { ret = probe_kernel_address(regs->nip, inst); -- 1.8.5.5