From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758691AbcHYNXR (ORCPT ); Thu, 25 Aug 2016 09:23:17 -0400 Received: from Galois.linutronix.de ([146.0.238.70]:34378 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758594AbcHYNXQ (ORCPT ); Thu, 25 Aug 2016 09:23:16 -0400 Date: Thu, 25 Aug 2016 15:20:59 +0200 (CEST) From: Thomas Gleixner To: Nicolai Stange cc: John Stultz , linux-kernel@vger.kernel.org Subject: Re: [RFC v4 14/22] clockevents: clockevents_program_event(): turn clc into unsigned long In-Reply-To: <20160822233320.4548-15-nicstange@gmail.com> Message-ID: References: <20160822233320.4548-1-nicstange@gmail.com> <20160822233320.4548-15-nicstange@gmail.com> User-Agent: Alpine 2.20 (DEB 67 2015-01-07) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 23 Aug 2016, Nicolai Stange wrote: > Right now, being of type unsigned long long, the clc local variable in > clockevents_program_event() is unnecessarily wide as it gets cast to > unsigned long anyway. Congrats! You just broke 32bit systems. When delta is sufficiently large then the mult overflows.... Thanks, tglx