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=-31.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT,USER_IN_DEF_DKIM_WL 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 3C09EC4320E for ; Mon, 30 Aug 2021 21:38:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E117361027 for ; Mon, 30 Aug 2021 21:38:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238487AbhH3Vjr (ORCPT ); Mon, 30 Aug 2021 17:39:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36228 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229887AbhH3Vjq (ORCPT ); Mon, 30 Aug 2021 17:39:46 -0400 Received: from mail-yb1-xb49.google.com (mail-yb1-xb49.google.com [IPv6:2607:f8b0:4864:20::b49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 07E23C061575 for ; Mon, 30 Aug 2021 14:38:52 -0700 (PDT) Received: by mail-yb1-xb49.google.com with SMTP id o76-20020a25414f000000b0059bb8130257so3164038yba.0 for ; Mon, 30 Aug 2021 14:38:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:message-id:mime-version:subject:from:to:cc; bh=HL0bHPC7fRhw8NveiezJuSyRlf1c6pLI+gcpO0vq9Sg=; b=Vw0YkpLrhfKJfwJ/o+LiWW8iYhrqyu75s/mnuCG5dXhDSWakhU7/UrE0jtlsGXxnwG iXFjlGLD5voK5KlOSCK4ZCoSlj7CQb/vgAiUU20YSaLD1eCtY9Y8Y0MV1Z0BvQUN7ARe 1m4VWFO7TQ32kIW91EXtJG1/9i6D5BtObjDDH1vqFc97HUye4X8oEo977sE3ieasNCwJ h1AY4zPaCQQkAR1W8AtIL1AFSHIAYEmD6Uu8sZREtW+Na0a/uHt6bCxqGuxezMU9dONu ZA6yM9sdwleWHTm1cx4DQmqGcwuFbjnHsanXtMOk5PE79GHtMzBcZl/wlo19kVyeUtGD eUPg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:message-id:mime-version:subject:from:to:cc; bh=HL0bHPC7fRhw8NveiezJuSyRlf1c6pLI+gcpO0vq9Sg=; b=GFlvAuXw/cLIrJJR5p+W9AdvmWx22p+qKtPPYWvtnPGtaRoGpfCXpnmwVXm9y3B7Kd A0ARGoc14ociYGtz0maaS/a6HzB5blGoF042GY7Hto7NJ97Ti/C9R+aBmko+acal1zp7 PoV4Hz45GwKbWbhkmEw+6bgaFzB8go3+tf2ITiI4w1BfcsF1L9BdQ6G14cmHNMqWVzNZ IYJ9eptramkghW/fq1AZaKQSZjRXMmD23B5LlYKv93vwiWFHR5cgxHXZOQ03Ka784VvH vS8oFHyLGJJIkqCjEHKN6rq1Nu6UD+vvVpH8B9AjahtrtFzIfeuWuHK6UV2G7OevLCjP g/IA== X-Gm-Message-State: AOAM533t4WeAS4EN5/hhf4veDI+B4+stSvTqLqZkQWUi4ffOOaZXgBm/ voI1Pwr+twwpaG1T5evPiQ/F0/KqdDcyGpjIJtw= X-Google-Smtp-Source: ABdhPJwIA5lJ67dNvJNzo05E+2L82lp32fjkWAPFbwD9w2A4+dtklq/RlB9I1vIcCowqPvM40IWGjkRYSiC3hSZi58c= X-Received: from ndesaulniers1.mtv.corp.google.com ([2620:15c:211:202:266b:6ef5:38a3:394c]) (user=ndesaulniers job=sendgmr) by 2002:a25:74cd:: with SMTP id p196mr15254588ybc.454.1630359531173; Mon, 30 Aug 2021 14:38:51 -0700 (PDT) Date: Mon, 30 Aug 2021 14:38:43 -0700 Message-Id: <20210830213846.2609349-1-ndesaulniers@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.33.0.259.gc128427fd7-goog Subject: [PATCH] ARM: select HAVE_FUTEX_CMPXCHG From: Nick Desaulniers To: linux-arm-kernel@lists.infradead.org Cc: llvm@lists.linux.dev, Nick Desaulniers , Arnd Bergmann , Nathan Chancellor , Thomas Gleixner , Russell King , Geert Uytterhoeven , Linus Walleij , Andrew Morton , Anshuman Khandual , Ard Biesheuvel , YiFei Zhu , "=?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?=" , Mike Rapoport , linux-kernel@vger.kernel.org, clang-built-linux@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org tglx notes: This function [futex_detect_cmpxchg] is only needed when an architecture has to runtime discover whether the CPU supports it or not. ARM has unconditional support for this, so the obvious thing to do is the below. Fixes linkage failure from Clang randconfigs: kernel/futex.o:(.text.fixup+0x5c): relocation truncated to fit: R_ARM_JUMP24 against `.init.text' and boot failures for CONFIG_THUMB2_KERNEL. Link: https://github.com/ClangBuiltLinux/linux/issues/325 Reported-by: Arnd Bergmann Reported-by: Nathan Chancellor Suggested-by: Thomas Gleixner Signed-off-by: Nick Desaulniers --- arch/arm/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index fc196421b2ce..b760dd45b734 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -92,6 +92,7 @@ config ARM select HAVE_FTRACE_MCOUNT_RECORD if !XIP_KERNEL select HAVE_FUNCTION_GRAPH_TRACER if !THUMB2_KERNEL && !CC_IS_CLANG select HAVE_FUNCTION_TRACER if !XIP_KERNEL + select HAVE_FUTEX_CMPXCHG if FUTEX select HAVE_GCC_PLUGINS select HAVE_HW_BREAKPOINT if PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7) select HAVE_IRQ_TIME_ACCOUNTING -- 2.33.0.259.gc128427fd7-goog