From patchwork Tue Jan 14 17:51:28 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Valentin Schneider X-Patchwork-Id: 13939196 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A1C0320CCD0 for ; Tue, 14 Jan 2025 17:59:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736877570; cv=none; b=Tu0iLJ/2IxeBoPQo1JAAL0kbktsfMKhMI+4c1HG+h5nR9OY0/6zEwVDirx1854DyJsWLeOyeT+gJhgJHYjotPJJMLvzjXCszwMkF/MP4DsUhgLEjS88kZA49cttWkl1lCMG4QpNtNVe763MK9wcUE7H/XieM4zxUBB5dunTIX7w= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736877570; c=relaxed/simple; bh=f+M7JVmuzBY3THk0fyjhKmyngjuTaSG33xgNtD22Ej8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=elwQOrCvjq8beR4NqH9nsCq/glvPj9fHkysRdtPChMaC5Bc82+Xx/vwppX8Tz6vBHT6rY/P0Sx+m9upwMUm+T/FRugJQvkTXwx0jjU7PlJYaIpCwr5UoSEETyhWsg/leiZ3NM2eoCmY7oa38RGYvMyR9aOnD2aFFK4mfHdINeyU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=BLQhEFC7; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="BLQhEFC7" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1736877567; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=vzSk9ZzswXx0ijJl+1BL1pcjLYKU11Wq/W2Kyfj2Pb8=; b=BLQhEFC7vf5T1pDwhAyVIup82HPmwZQ1H/2gQOxLoq4weYA6FG2PH1PqHtM8fBgToQ4qvC xrwYDhGime8Ol7jxz+B7VoQOljmuH7QptFaN1g0GXvJHbSaOek9h5kK+HH9uAdQcGp2n/7 DSuhj/5szRPJIuz+JpTAeAyhoZ+lztU= Received: from mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-317-domFoMd6N8WvyrMSzp1fqA-1; Tue, 14 Jan 2025 12:59:23 -0500 X-MC-Unique: domFoMd6N8WvyrMSzp1fqA-1 X-Mimecast-MFC-AGG-ID: domFoMd6N8WvyrMSzp1fqA Received: from mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.15]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id E586919560B7; Tue, 14 Jan 2025 17:59:19 +0000 (UTC) Received: from vschneid-thinkpadt14sgen2i.remote.csb (unknown [10.39.192.55]) by mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 21066195608A; Tue, 14 Jan 2025 17:58:54 +0000 (UTC) From: Valentin Schneider To: linux-kernel@vger.kernel.org, x86@kernel.org, virtualization@lists.linux.dev, linux-arm-kernel@lists.infradead.org, loongarch@lists.linux.dev, linux-riscv@lists.infradead.org, linux-perf-users@vger.kernel.org, xen-devel@lists.xenproject.org, kvm@vger.kernel.org, linux-arch@vger.kernel.org, rcu@vger.kernel.org, linux-hardening@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, bpf@vger.kernel.org, bcm-kernel-feedback-list@broadcom.com Cc: Juergen Gross , Ajay Kaher , Alexey Makhalov , Russell King , Catalin Marinas , Will Deacon , Huacai Chen , WANG Xuerui , Paul Walmsley , Palmer Dabbelt , Albert Ou , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , Peter Zijlstra , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , "Liang, Kan" , Boris Ostrovsky , Josh Poimboeuf , Pawan Gupta , Sean Christopherson , Paolo Bonzini , Andy Lutomirski , Arnd Bergmann , Frederic Weisbecker , "Paul E. McKenney" , Jason Baron , Steven Rostedt , Ard Biesheuvel , Neeraj Upadhyay , Joel Fernandes , Josh Triplett , Boqun Feng , Uladzislau Rezki , Mathieu Desnoyers , Lai Jiangshan , Zqiang , Juri Lelli , Clark Williams , Yair Podemsky , Tomas Glozar , Vincent Guittot , Dietmar Eggemann , Ben Segall , Mel Gorman , Kees Cook , Andrew Morton , Christoph Hellwig , Shuah Khan , Sami Tolvanen , Miguel Ojeda , Alice Ryhl , "Mike Rapoport (Microsoft)" , Samuel Holland , Rong Xu , Nicolas Saenz Julienne , Geert Uytterhoeven , Yosry Ahmed , "Kirill A. Shutemov" , "Masami Hiramatsu (Google)" , Jinghao Jia , Luis Chamberlain , Randy Dunlap , Tiezhu Yang Subject: [PATCH v4 15/30] sched/clock: Mark sched_clock_running key as __ro_after_init Date: Tue, 14 Jan 2025 18:51:28 +0100 Message-ID: <20250114175143.81438-16-vschneid@redhat.com> In-Reply-To: <20250114175143.81438-1-vschneid@redhat.com> References: <20250114175143.81438-1-vschneid@redhat.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.15 sched_clock_running is only ever enabled in the __init functions sched_clock_init() and sched_clock_init_late(), and is never disabled. Mark it __ro_after_init. Signed-off-by: Valentin Schneider --- kernel/sched/clock.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/sched/clock.c b/kernel/sched/clock.c index a09655b481402..200e5568b9894 100644 --- a/kernel/sched/clock.c +++ b/kernel/sched/clock.c @@ -66,7 +66,7 @@ notrace unsigned long long __weak sched_clock(void) } EXPORT_SYMBOL_GPL(sched_clock); -static DEFINE_STATIC_KEY_FALSE(sched_clock_running); +static DEFINE_STATIC_KEY_FALSE_RO(sched_clock_running); #ifdef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK /*