From nobody Fri Dec 19 14:03:02 2025 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (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 4FD992FB62E for ; Fri, 10 Oct 2025 15:42:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760110966; cv=none; b=SM/XkrpgLfG//U6AMcd11nSjmZ7mDzkJoov/p0ilLVLEks7rBphsCccxkQc+U3DprbB5nwxxFiuw/vzDXeh+Lj2I4cpcMCfHkjI01OmWr+clHicav0lFvrSQlDQy2RNK6JEvDWH1dWYa4aja73zBO60lLmGb0DfzRb84UoiluLY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760110966; c=relaxed/simple; bh=j1Uj5RiAQzza7RfiG80uIgtVjXdE2uVY1KJiDuyYz2w=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=cfaSCFi7ZyjiNKf+kCI/mZ4ppf6s2ypsmzOivsZarByqkLIUfz4ogFptU1FEgd4hFcTWwFTVd8LT0bLsQ/cYBu3l8mPs543vgZRUGC3VVWP4BNLzjlODnLah7kHY/pWv+f2jD5WGFYOP1LaY+if2jVL7Ix1nbGl/DoRBmfNp4y4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine 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=I39go3LC; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine 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="I39go3LC" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1760110963; 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=c85HG9M5FnMNKHSoA3zkMZkmQw264GRYsrTXaruk+rY=; b=I39go3LCfbWpObYaYDiPF0/+sbjGskXoG0Ajlhbpye2/U0V8JbUStHfiY0xVkZIdXf+UNz a+z0lBxQ91+plBMBoH9g5Mmppv+V6ur3h9soFAk0Q9aFZRJxC45qeOytwBMRG9aqEMAlD/ bvYkh3RxZ+pbGctmzz0O19wsbWeJ7Po= Received: from mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-244-WHaa5xPLOOOfBTTf7Rya5g-1; Fri, 10 Oct 2025 11:42:39 -0400 X-MC-Unique: WHaa5xPLOOOfBTTf7Rya5g-1 X-Mimecast-MFC-AGG-ID: WHaa5xPLOOOfBTTf7Rya5g_1760110955 Received: from mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.111]) (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-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id D4B991800447; Fri, 10 Oct 2025 15:42:34 +0000 (UTC) Received: from vschneid-thinkpadt14sgen2i.remote.csb (unknown [10.45.224.29]) by mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 3CFA21800576; Fri, 10 Oct 2025 15:42:19 +0000 (UTC) From: Valentin Schneider To: linux-kernel@vger.kernel.org, linux-mm@kvack.org, rcu@vger.kernel.org, x86@kernel.org, linux-arm-kernel@lists.infradead.org, loongarch@lists.linux.dev, linux-riscv@lists.infradead.org, linux-arch@vger.kernel.org, linux-trace-kernel@vger.kernel.org Cc: Josh Poimboeuf , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , Andy Lutomirski , Peter Zijlstra , Arnaldo Carvalho de Melo , Paolo Bonzini , Arnd Bergmann , Frederic Weisbecker , "Paul E. McKenney" , Jason Baron , Steven Rostedt , Ard Biesheuvel , Sami Tolvanen , "David S. Miller" , Neeraj Upadhyay , Joel Fernandes , Josh Triplett , Boqun Feng , Uladzislau Rezki , Mathieu Desnoyers , Mel Gorman , Andrew Morton , Masahiro Yamada , Han Shen , Rik van Riel , Jann Horn , Dan Carpenter , Oleg Nesterov , Juri Lelli , Clark Williams , Yair Podemsky , Marcelo Tosatti , Daniel Wagner , Petr Tesarik Subject: [PATCH v6 07/29] x86/paravirt: Mark pv_sched_clock static call as __ro_after_init Date: Fri, 10 Oct 2025 17:38:17 +0200 Message-ID: <20251010153839.151763-8-vschneid@redhat.com> In-Reply-To: <20251010153839.151763-1-vschneid@redhat.com> References: <20251010153839.151763-1-vschneid@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.111 Content-Type: text/plain; charset="utf-8" Later commits will cause objtool to warn about static calls being used in .noinstr sections in order to safely defer instruction patching IPIs targeted at NOHZ_FULL CPUs. pv_sched_clock is updated in: o __init vmware_paravirt_ops_setup() o __init xen_init_time_common() o kvm_sched_clock_init() <- __init kvmclock_init() o hv_setup_sched_clock() <- __init hv_init_tsc_clocksource() IOW purely init context, and can thus be marked as __ro_after_init. Reported-by: Josh Poimboeuf Signed-off-by: Valentin Schneider --- arch/x86/kernel/paravirt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c index ab3e172dcc693..34b6fa3fcc045 100644 --- a/arch/x86/kernel/paravirt.c +++ b/arch/x86/kernel/paravirt.c @@ -69,7 +69,7 @@ static u64 native_steal_clock(int cpu) } =20 DEFINE_STATIC_CALL(pv_steal_clock, native_steal_clock); -DEFINE_STATIC_CALL(pv_sched_clock, native_sched_clock); +DEFINE_STATIC_CALL_RO(pv_sched_clock, native_sched_clock); =20 void paravirt_set_sched_clock(u64 (*func)(void)) { --=20 2.51.0