From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id ABB5FC3A59B for ; Fri, 30 Aug 2019 14:16:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7DF7B2341B for ; Fri, 30 Aug 2019 14:16:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727938AbfH3OQx (ORCPT ); Fri, 30 Aug 2019 10:16:53 -0400 Received: from foss.arm.com ([217.140.110.172]:32928 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727751AbfH3OQx (ORCPT ); Fri, 30 Aug 2019 10:16:53 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 4BC1B344; Fri, 30 Aug 2019 07:16:52 -0700 (PDT) Received: from [10.1.196.72] (e119884-lin.cambridge.arm.com [10.1.196.72]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 3B4383F703; Fri, 30 Aug 2019 07:16:49 -0700 (PDT) Subject: Re: [PATCH v2 5/8] lib: vdso: Remove checks on return value for 32 bit vDSO From: Vincenzo Frascino To: linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, linux-kselftest@vger.kernel.org Cc: catalin.marinas@arm.com, 0x7f454c46@gmail.com, salyzyn@android.com, paul.burton@mips.com, luto@kernel.org, tglx@linutronix.de, will@kernel.org References: <20190830135902.20861-1-vincenzo.frascino@arm.com> <20190830135902.20861-6-vincenzo.frascino@arm.com> Message-ID: Date: Fri, 30 Aug 2019 15:16:47 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <20190830135902.20861-6-vincenzo.frascino@arm.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-mips-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org On 30/08/2019 14:58, Vincenzo Frascino wrote: > Since all the architectures that support the generic vDSO library have > been converted to support the 32 bit fallbacks it is not required > anymore to check the return value of __cvdso_clock_get*time32_common() > before updating the old_timespec fields. > > Remove the related checks from the generic vdso library. > > Cc: Thomas Gleixner > CC: Andy Lutomirski Forgot to add to this patch: Suggested-by: Andy Lutomirski > References: c60a32ea4f45 ("lib/vdso/32: Provide legacy syscall fallbacks") > Signed-off-by: Vincenzo Frascino > --- > lib/vdso/gettimeofday.c | 16 ++++++++-------- > 1 file changed, 8 insertions(+), 8 deletions(-) > > diff --git a/lib/vdso/gettimeofday.c b/lib/vdso/gettimeofday.c > index 2c4b311c226d..d5bc16748f81 100644 > --- a/lib/vdso/gettimeofday.c > +++ b/lib/vdso/gettimeofday.c > @@ -129,10 +129,10 @@ __cvdso_clock_gettime32(clockid_t clock, struct old_timespec32 *res) > if (unlikely(ret)) > return clock_gettime32_fallback(clock, res); > > - if (likely(!ret)) { > - res->tv_sec = ts.tv_sec; > - res->tv_nsec = ts.tv_nsec; > - } > + /* For ret == 0 */ > + res->tv_sec = ts.tv_sec; > + res->tv_nsec = ts.tv_nsec; > + > return ret; > } > #endif /* BUILD_VDSO32 */ > @@ -238,10 +238,10 @@ __cvdso_clock_getres_time32(clockid_t clock, struct old_timespec32 *res) > if (unlikely(ret)) > return clock_getres32_fallback(clock, res); > > - if (likely(!ret)) { > - res->tv_sec = ts.tv_sec; > - res->tv_nsec = ts.tv_nsec; > - } > + /* For ret == 0 */ > + res->tv_sec = ts.tv_sec; > + res->tv_nsec = ts.tv_nsec; > + > return ret; > } > #endif /* BUILD_VDSO32 */ > -- Regards, Vincenzo