From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757421AbbJ2PAz (ORCPT ); Thu, 29 Oct 2015 11:00:55 -0400 Received: from a.ns.miles-group.at ([95.130.255.143]:11949 "EHLO radon.swed.at" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752133AbbJ2PAy (ORCPT ); Thu, 29 Oct 2015 11:00:54 -0400 Subject: Re: [PATCH v3] um: net: replace GFP_KERNEL with GFP_ATOMIC when spinlock is held To: Joe Perches , Saurabh Sengar References: <1446110203-21968-1-git-send-email-saurabh.truth@gmail.com> <1446130255.2757.168.camel@perches.com> Cc: jdike@addtoit.com, user-mode-linux-devel@lists.sourceforge.net, user-mode-linux-user@lists.sourceforge.net, linux-kernel@vger.kernel.org From: Richard Weinberger Message-ID: <563234A0.1010901@nod.at> Date: Thu, 29 Oct 2015 16:00:48 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: <1446130255.2757.168.camel@perches.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Am 29.10.2015 um 15:50 schrieb Joe Perches: > On Thu, 2015-10-29 at 14:46 +0530, Saurabh Sengar wrote: >> replace GFP_KERNEL with GFP_ATOMIC while spinlock is held, >> as code while holding a spinlock should be atomic. >> GFP_KERNEL may sleep and can cause deadlock, >> where as GFP_ATOMIC may fail but certainly avoids deadlock >> >> Signed-off-by: Saurabh Sengar >> --- >> v3: removed the atomic variable, as per Richard comment > > Trivia: You could remove the gfp_mask variables too > and just use GFP_KERNEL and GFP_ATOMIC directly. Yep. And "int gfp_mask" does also not make sense, GFP_* is of type gfp_t. Thanks, //richard