From patchwork Tue Apr 30 09:17:07 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Valentin Schneider X-Patchwork-Id: 13648579 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 CCF3D12837E for ; Tue, 30 Apr 2024 09:18:22 +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=1714468704; cv=none; b=sW/7S7+i02K4kQxpQym5Jxom+UsrrxRfy0dABWg/Qp5joDZrxLYe0nEmU29lITyBwqUCtEX/QxM3dZa+SZLwtNKNXjG2ItDAxFdVPQQzJnGAGui6Y0PMtnD0fNgsd5H5SjRerhPtfYAorr4vDikX3Kbvfq836kQehwucF2/xxis= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714468704; c=relaxed/simple; bh=6W21K9eH/6kGr4UiCCz78lCh/I3jLdLhvQ6VLuSlWqA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ph1WI2iLA9weo4JpN9+YaIoU3bvsb4uNRKLje9gNJ+TFCuJzXcCfzRADjZgEteegGdyOcONzalMX7AnsoV3RJQU9goN23NNLCllhh5Y2ZIbx/PBOemv7ID1AmcOtZDpzc81QtEjXN3gksC58OaZ12x4ykUs5Jgc1oj1wF+SE/pM= 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=N2K9K9pc; 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="N2K9K9pc" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1714468701; 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=CFlTn+/v8IRwxqNngHBcNmTXrKR+6D0bXWHVkn7P2Ec=; b=N2K9K9pchwBAtn0ddNqOTE1+22TQM7OH3Gsx4Ch20KMO1SuPSh23LNCsfa0n+iYFozU0J4 3UA9fO2102pgfGfw/iu8pp0al7gWJzA9nWENZVbWdT5TAT4K+Yd9vyPu+QZWP4t8f9hCHz fI046W7NBmM7s92Z/x5maMwcZxVPelI= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-375-JIKxblCvOUC1R3xYbu7TSg-1; Tue, 30 Apr 2024 05:18:15 -0400 X-MC-Unique: JIKxblCvOUC1R3xYbu7TSg-1 Received: from smtp.corp.redhat.com (int-mx10.intmail.prod.int.rdu2.redhat.com [10.11.54.10]) (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 mimecast-mx02.redhat.com (Postfix) with ESMTPS id DE1BC100ADE3; Tue, 30 Apr 2024 09:18:14 +0000 (UTC) Received: from vschneid-thinkpadt14sgen2i.remote.csb (unknown [10.39.193.247]) by smtp.corp.redhat.com (Postfix) with ESMTPS id D22D140ED37; Tue, 30 Apr 2024 09:18:12 +0000 (UTC) From: Valentin Schneider To: rcu@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Frederic Weisbecker , "Paul E. McKenney" , Peter Zijlstra , Neeraj Upadhyay , Joel Fernandes , Josh Triplett , Boqun Feng , Steven Rostedt , Mathieu Desnoyers , Lai Jiangshan , Zqiang Subject: [PATCH v2 03/27] context_tracking, rcu: Rename ct_dynticks() into ct_rcu_watching() Date: Tue, 30 Apr 2024 11:17:07 +0200 Message-ID: <20240430091740.1826862-4-vschneid@redhat.com> In-Reply-To: <20240430091740.1826862-1-vschneid@redhat.com> References: <20240430091740.1826862-1-vschneid@redhat.com> Precedence: bulk X-Mailing-List: rcu@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.10 The context_tracking.state RCU_DYNTICKS subvariable has been renamed to RCU_WATCHING, reflect that change in the related helpers. Signed-off-by: Valentin Schneider Reviewed-by: Frederic Weisbecker --- include/linux/context_tracking_state.h | 2 +- kernel/context_tracking.c | 10 +++++----- kernel/rcu/tree.c | 2 +- 3 files changed, 7 insertions(+), 7 deletions(-) diff --git a/include/linux/context_tracking_state.h b/include/linux/context_tracking_state.h index 94d6a935af3be..cb90d8c178104 100644 --- a/include/linux/context_tracking_state.h +++ b/include/linux/context_tracking_state.h @@ -56,7 +56,7 @@ static __always_inline int __ct_state(void) #endif #ifdef CONFIG_CONTEXT_TRACKING_IDLE -static __always_inline int ct_dynticks(void) +static __always_inline int ct_rcu_watching(void) { return atomic_read(this_cpu_ptr(&context_tracking.state)) & CT_RCU_WATCHING_MASK; } diff --git a/kernel/context_tracking.c b/kernel/context_tracking.c index 9f009de83cc8e..738a9ff4f1f51 100644 --- a/kernel/context_tracking.c +++ b/kernel/context_tracking.c @@ -137,7 +137,7 @@ static void noinstr ct_kernel_exit(bool user, int offset) instrumentation_begin(); lockdep_assert_irqs_disabled(); - trace_rcu_dyntick(TPS("Start"), ct_dynticks_nesting(), 0, ct_dynticks()); + trace_rcu_dyntick(TPS("Start"), ct_dynticks_nesting(), 0, ct_rcu_watching()); WARN_ON_ONCE(IS_ENABLED(CONFIG_RCU_EQS_DEBUG) && !user && !is_idle_task(current)); rcu_preempt_deferred_qs(current); @@ -182,7 +182,7 @@ static void noinstr ct_kernel_enter(bool user, int offset) // instrumentation for the noinstr ct_kernel_enter_state() instrument_atomic_write(&ct->state, sizeof(ct->state)); - trace_rcu_dyntick(TPS("End"), ct_dynticks_nesting(), 1, ct_dynticks()); + trace_rcu_dyntick(TPS("End"), ct_dynticks_nesting(), 1, ct_rcu_watching()); WARN_ON_ONCE(IS_ENABLED(CONFIG_RCU_EQS_DEBUG) && !user && !is_idle_task(current)); WRITE_ONCE(ct->dynticks_nesting, 1); WARN_ON_ONCE(ct_dynticks_nmi_nesting()); @@ -220,7 +220,7 @@ void noinstr ct_nmi_exit(void) */ if (ct_dynticks_nmi_nesting() != 1) { trace_rcu_dyntick(TPS("--="), ct_dynticks_nmi_nesting(), ct_dynticks_nmi_nesting() - 2, - ct_dynticks()); + ct_rcu_watching()); WRITE_ONCE(ct->dynticks_nmi_nesting, /* No store tearing. */ ct_dynticks_nmi_nesting() - 2); instrumentation_end(); @@ -228,7 +228,7 @@ void noinstr ct_nmi_exit(void) } /* This NMI interrupted an RCU-idle CPU, restore RCU-idleness. */ - trace_rcu_dyntick(TPS("Startirq"), ct_dynticks_nmi_nesting(), 0, ct_dynticks()); + trace_rcu_dyntick(TPS("Startirq"), ct_dynticks_nmi_nesting(), 0, ct_rcu_watching()); WRITE_ONCE(ct->dynticks_nmi_nesting, 0); /* Avoid store tearing. */ // instrumentation for the noinstr ct_kernel_exit_state() @@ -296,7 +296,7 @@ void noinstr ct_nmi_enter(void) trace_rcu_dyntick(incby == 1 ? TPS("Endirq") : TPS("++="), ct_dynticks_nmi_nesting(), - ct_dynticks_nmi_nesting() + incby, ct_dynticks()); + ct_dynticks_nmi_nesting() + incby, ct_rcu_watching()); instrumentation_end(); WRITE_ONCE(ct->dynticks_nmi_nesting, /* Prevent store tearing. */ ct_dynticks_nmi_nesting() + incby); diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 84befc91799a3..db64f092428dd 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -291,7 +291,7 @@ void rcu_softirq_qs(void) */ static void rcu_dynticks_eqs_online(void) { - if (ct_dynticks() & CT_RCU_WATCHING) + if (ct_rcu_watching() & CT_RCU_WATCHING) return; ct_state_inc(CT_RCU_WATCHING); }