From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751449AbdBAH5A (ORCPT ); Wed, 1 Feb 2017 02:57:00 -0500 Received: from mx1.redhat.com ([209.132.183.28]:49984 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751080AbdBAH45 (ORCPT ); Wed, 1 Feb 2017 02:56:57 -0500 Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 From: David Howells In-Reply-To: References: <20170131165537.GC23970@htj.duckdns.org> To: Linus Torvalds Cc: dhowells@redhat.com, Tejun Heo , "linux-arch@vger.kernel.org" , Linux Kernel Mailing List , dougmill@linux.vnet.ibm.com Subject: Re: [GIT PULL] percpu fix for v4.10-rc6 MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <17590.1485935811.1@warthog.procyon.org.uk> Date: Wed, 01 Feb 2017 07:56:51 +0000 Message-ID: <17591.1485935811@warthog.procyon.org.uk> X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.32]); Wed, 01 Feb 2017 07:56:57 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Linus Torvalds wrote: > The fact is, atomic_long_inc_not_zero() shouldn't be returning > anything with high bits.. Ummm... Why's that the case? If atomic_long_t can never exceed UINT_MAX, then why does it exist at all? David