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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8F246C433F5 for ; Thu, 24 Feb 2022 09:33:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232788AbiBXJdv (ORCPT ); Thu, 24 Feb 2022 04:33:51 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48892 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232665AbiBXJds (ORCPT ); Thu, 24 Feb 2022 04:33:48 -0500 Received: from mail-pl1-x62f.google.com (mail-pl1-x62f.google.com [IPv6:2607:f8b0:4864:20::62f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C7114279912 for ; Thu, 24 Feb 2022 01:33:17 -0800 (PST) Received: by mail-pl1-x62f.google.com with SMTP id e13so1193994plh.3 for ; Thu, 24 Feb 2022 01:33:17 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20210112.gappssmtp.com; s=20210112; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=OMIZP6Tn3aNghkB6sgI2t3mcM1DU0EefBNvEwhIXg7s=; b=bnEy6oVHEjlP6py1RGQ0IRdAQo4si4xNGKMak2bDSmFVhT/YCK1CEGuYOIbwi++MOH HDVaq2kou8+Etgm4eE/ZDBKxbttvjPsu3aTYLgzyNZAFVHDcvAazo+iwf54kNC1GSYLf gS786hKTlL+//CkSxzrqDxFb42sSpgLOzMgklp0O0843cj4ehroSkJtkOaWNL4A7UmEa 7WrLdrx2ezjrLjOeQl1w1gkJtWGrvjlsCBgFpPLHFOj2B5PcYe9P6DwwFj0ZrxhvA9DR pFLdmbdzkvH3IXjpKjQrSNn5L7+QtMLWFd4L8C4/ezw4UZV+enXIQB3h03U8ww+o34hx H87w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=OMIZP6Tn3aNghkB6sgI2t3mcM1DU0EefBNvEwhIXg7s=; b=kLJUaMIQhFSNaWn1dncIJu8oEuhHRAgl3Y+hPJS/6M7ciOfQsswIJ3nhX6FhhSV+iK T1G8rz9ozy/FZDeVrfUL8V0Olsyndj/P9zKzEpgamkfIxcVB+iswsLx9fBLk8oqWYe81 Li13uNn6UvAFKSQg+WnWKw48FG/HY5DhaZ9kS3wz/xlldvlTK78otNXFD3NlMZicagLv CG8qbwX2/ZndmWc3bfEbJg8q7E4irGPc7ymIH9I85/ePPtrtQ871awEBfcNrWFp2KVPU 6/40ELIs3wYNVEy+P3y4HhhTmegbQ0/gfhnoN6835RoU+MPogmznMgBFThZ3hw92lyOC wXJA== X-Gm-Message-State: AOAM532y8yEoohEW79RgU+bv5hF+AwtguIjoHHOpr0UbHU+jCMr1llLm 50h26NmP1+4CpbKRYZKYcJAJqA== X-Google-Smtp-Source: ABdhPJxS5+gNrTAaOlz3Mv8zDTadsNwcTzdsmY8lcyo257Y5g5dxXtYn+i5IXdMYEZsOgTaSV9MuYA== X-Received: by 2002:a17:902:bc82:b0:14f:2b9c:4aa with SMTP id bb2-20020a170902bc8200b0014f2b9c04aamr1623688plb.145.1645695197232; Thu, 24 Feb 2022 01:33:17 -0800 (PST) Received: from C02CV1DAMD6P.bytedance.net ([139.177.225.251]) by smtp.gmail.com with ESMTPSA id 13sm2530988pfx.122.2022.02.24.01.33.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 24 Feb 2022 01:33:16 -0800 (PST) From: Chengming Zhou To: rostedt@goodmis.org, mark.rutland@arm.com, mingo@redhat.com, tglx@linutronix.de, catalin.marinas@arm.com, will@kernel.org, dave.hansen@linux.intel.com, broonie@kernel.org Cc: x86@kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, songmuchun@bytedance.com, qirui.001@bytedance.com, Chengming Zhou Subject: [PATCH v3 1/3] ftrace: cleanup ftrace_graph_caller enable and disable Date: Thu, 24 Feb 2022 17:32:49 +0800 Message-Id: <20220224093251.49971-1-zhouchengming@bytedance.com> X-Mailer: git-send-email 2.35.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The ftrace_enable_ftrace_graph_caller() and ftrace_disable_ftrace_graph_caller() are used to do special hooks for graph tracer, which are not needed on some ARCHs that use graph_ops:func function to install return_hooker. So introduce the weak version in Ftrace core code to prepare for cleanup. Signed-off-by: Chengming Zhou --- kernel/trace/ftrace.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index f9feb197b2da..60ae009e6684 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -2704,6 +2704,26 @@ int __weak ftrace_arch_code_modify_post_process(void) return 0; } +#ifdef CONFIG_FUNCTION_GRAPH_TRACER +/* + * archs can override this function if they must do something + * to enable hook for graph tracer. + */ +int __weak ftrace_enable_ftrace_graph_caller(void) +{ + return 0; +} + +/* + * archs can override this function if they must do something + * to disable hook for graph tracer. + */ +int __weak ftrace_disable_ftrace_graph_caller(void) +{ + return 0; +} +#endif + void ftrace_modify_all_code(int command) { int update = command & FTRACE_UPDATE_TRACE_FUNC; -- 2.20.1