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[209.132.180.67]) by mx.google.com with ESMTP id j19si11859940oij.51.2020.01.16.14.28.06; Thu, 16 Jan 2020 14:28:17 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@c-s.fr header.s=mail header.b=UQil0z6K; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2394687AbgAPR6l (ORCPT + 99 others); Thu, 16 Jan 2020 12:58:41 -0500 Received: from pegase1.c-s.fr ([93.17.236.30]:56142 "EHLO pegase1.c-s.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2394666AbgAPR6f (ORCPT ); Thu, 16 Jan 2020 12:58:35 -0500 Received: from localhost (mailhub1-int [192.168.12.234]) by localhost (Postfix) with ESMTP id 47zBkw4Y6lz9v4gn; Thu, 16 Jan 2020 18:58:32 +0100 (CET) Authentication-Results: localhost; dkim=pass reason="1024-bit key; insecure key" header.d=c-s.fr header.i=@c-s.fr header.b=UQil0z6K; dkim-adsp=pass; dkim-atps=neutral X-Virus-Scanned: Debian amavisd-new at c-s.fr Received: from pegase1.c-s.fr ([192.168.12.234]) by localhost (pegase1.c-s.fr [192.168.12.234]) (amavisd-new, port 10024) with ESMTP id mhPOBAGVB8j6; Thu, 16 Jan 2020 18:58:32 +0100 (CET) Received: from messagerie.si.c-s.fr (messagerie.si.c-s.fr [192.168.25.192]) by pegase1.c-s.fr (Postfix) with ESMTP id 47zBkw3RdHz9v4gc; Thu, 16 Jan 2020 18:58:32 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=c-s.fr; s=mail; t=1579197512; bh=dI2VkNAhHWcekKp95TXfWTj0joevEjoDA4cLyXKcRJs=; h=In-Reply-To:References:From:Subject:To:Cc:Date:From; b=UQil0z6KPtZoE4IIgyqrDBSU9X++9rjj8ncIeY6CZXiPoACTViMiHr1hq6MyLqjFs NYsS+kkgITXlInWdQjntooTn54GkdBh+PsKIX4v6NrruyU3YXO9ZTwlCbRP6T1mThA NiCgtiKs/DT7XbSGH03WuzM4g4BuDwB/Ys2ivoQU= Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 0913F8B82A; Thu, 16 Jan 2020 18:58:34 +0100 (CET) X-Virus-Scanned: amavisd-new at c-s.fr Received: from messagerie.si.c-s.fr ([127.0.0.1]) by localhost (messagerie.si.c-s.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id eHJ2rsSqhfWE; Thu, 16 Jan 2020 18:58:33 +0100 (CET) Received: from po14934vm.idsi0.si.c-s.fr (unknown [192.168.4.90]) by messagerie.si.c-s.fr (Postfix) with ESMTP id BFACF8B82D; Thu, 16 Jan 2020 18:58:33 +0100 (CET) Received: by po14934vm.idsi0.si.c-s.fr (Postfix, from userid 0) id 9828464A33; Thu, 16 Jan 2020 17:58:33 +0000 (UTC) Message-Id: <2bf9735a6ae5ff9b350b667c0b8434cf2bbe9b50.1579196675.git.christophe.leroy@c-s.fr> In-Reply-To: References: From: Christophe Leroy Subject: [RFC PATCH v4 09/11] powerpc/vdso: override __arch_vdso_capable() To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , nathanl@linux.ibm.com, arnd@arndb.de, tglx@linutronix.de, vincenzo.frascino@arm.com, luto@kernel.org Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org, x86@kernel.org Date: Thu, 16 Jan 2020 17:58:33 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When the timebase is used, make __arch_vdso_capable() always return true. When the RTC clock is used, make __arch_vdso_capable() always return false. Before the patch: clock-gettime-realtime: vdso: 1086 nsec/call After the patch: clock-gettime-realtime: vdso: 1033 nsec/call Signed-off-by: Christophe Leroy --- arch/powerpc/include/asm/vdso/gettimeofday.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/powerpc/include/asm/vdso/gettimeofday.h b/arch/powerpc/include/asm/vdso/gettimeofday.h index 0a247f9b9af9..74b6eef8fbe9 100644 --- a/arch/powerpc/include/asm/vdso/gettimeofday.h +++ b/arch/powerpc/include/asm/vdso/gettimeofday.h @@ -74,6 +74,12 @@ static __always_inline u64 __arch_get_hw_counter(s32 clock_mode) const struct vdso_data *__arch_get_vdso_data(void); +static inline bool __arch_vdso_capable(const struct vdso_data *vd) +{ + return !__USE_RTC(); +} +#define __arch_vdso_capable __arch_vdso_capable + /* * powerpc specific delta calculation. * -- 2.13.3