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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 5E2C6C3B19D for ; Fri, 14 Feb 2020 15:26:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 31F2924677 for ; Fri, 14 Feb 2020 15:26:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581693997; bh=V5GZKbLFr6begnIHGMKZJCEBnr/U6FZI2ulLvyVB+Qw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Ytx4mROefIvMMg8SdXUqqvP0F6/FYnWJN4HG1D2A/YO08q+ZGqjsEGYGFiD+HJKo3 zPqImv6ovLvDgAByiEq1+ebprcJXLKzSf79qDQY8Hg6woXvhLDRYCcYIqvKTo6G9E4 SdDU8/J5VNTbK46UrDpEtu/Jb6zOAU2zr1rIdvjE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387534AbgBNP0g (ORCPT ); Fri, 14 Feb 2020 10:26:36 -0500 Received: from mail.kernel.org ([198.145.29.99]:38316 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387488AbgBNP0e (ORCPT ); Fri, 14 Feb 2020 10:26:34 -0500 Received: from lenoir.home (lfbn-ncy-1-985-231.w90-101.abo.wanadoo.fr [90.101.63.231]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id ADB552465D; Fri, 14 Feb 2020 15:26:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581693993; bh=V5GZKbLFr6begnIHGMKZJCEBnr/U6FZI2ulLvyVB+Qw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tSMhtQzcLIUH+v4bURXvtZ19rSP3CrkiVGEpmp3fEC5bI3BuplPpxn3R3kAUDgne5 tFbsNlJ9ZCMe0lM7cemlrC1K0tAy1ij70v/2UlTU6Dbx/SfUKNA2taOsG6fZN8UPF0 purnriSS1j4glXoS0jYa8g37Ayur+4JSowzCykHI= From: Frederic Weisbecker To: LKML Cc: Frederic Weisbecker , Paul Burton , Peter Zijlstra , "David S . Miller" , Borislav Petkov , Benjamin Herrenschmidt , Paul Mackerras , Thomas Gleixner , Andy Lutomirski , Ralf Baechle , Ingo Molnar , Will Deacon , Catalin Marinas , Michael Ellerman , Russell King Subject: [PATCH 3/5] x86: Remove TIF_NOHZ Date: Fri, 14 Feb 2020 16:26:13 +0100 Message-Id: <20200214152615.25447-4-frederic@kernel.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200214152615.25447-1-frederic@kernel.org> References: <20200214152615.25447-1-frederic@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Static keys have replaced TIF_NOHZ to optimize the calls to context tracking. We can now safely remove that thread flag. Signed-off-by: Frederic Weisbecker Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Peter Zijlstra Cc: Borislav Petkov Cc: Andy Lutomirski --- arch/x86/Kconfig | 1 - arch/x86/include/asm/thread_info.h | 2 -- 2 files changed, 3 deletions(-) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 549eed3460c9..beea77046f9b 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -211,7 +211,6 @@ config X86 select HAVE_STACK_VALIDATION if X86_64 select HAVE_RSEQ select HAVE_SYSCALL_TRACEPOINTS - select HAVE_TIF_NOHZ if X86_64 select HAVE_UNSTABLE_SCHED_CLOCK select HAVE_USER_RETURN_NOTIFIER select HAVE_GENERIC_VDSO diff --git a/arch/x86/include/asm/thread_info.h b/arch/x86/include/asm/thread_info.h index 6cb9d1b0d1e6..384cdde10680 100644 --- a/arch/x86/include/asm/thread_info.h +++ b/arch/x86/include/asm/thread_info.h @@ -92,7 +92,6 @@ struct thread_info { #define TIF_NOCPUID 15 /* CPUID is not accessible in userland */ #define TIF_NOTSC 16 /* TSC is not accessible in userland */ #define TIF_IA32 17 /* IA32 compatibility process */ -#define TIF_NOHZ 19 /* in adaptive nohz mode */ #define TIF_MEMDIE 20 /* is terminating due to OOM killer */ #define TIF_POLLING_NRFLAG 21 /* idle is polling for TIF_NEED_RESCHED */ #define TIF_IO_BITMAP 22 /* uses I/O bitmap */ @@ -122,7 +121,6 @@ struct thread_info { #define _TIF_NOCPUID (1 << TIF_NOCPUID) #define _TIF_NOTSC (1 << TIF_NOTSC) #define _TIF_IA32 (1 << TIF_IA32) -#define _TIF_NOHZ (1 << TIF_NOHZ) #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG) #define _TIF_IO_BITMAP (1 << TIF_IO_BITMAP) #define _TIF_FORCED_TF (1 << TIF_FORCED_TF) -- 2.25.0