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 8AED8C433FE for ; Mon, 14 Mar 2022 22:19:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244673AbiCNWUh (ORCPT ); Mon, 14 Mar 2022 18:20:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52316 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234328AbiCNWUg (ORCPT ); Mon, 14 Mar 2022 18:20:36 -0400 Received: from mail-yb1-xb4a.google.com (mail-yb1-xb4a.google.com [IPv6:2607:f8b0:4864:20::b4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 47BD112ABB for ; Mon, 14 Mar 2022 15:19:22 -0700 (PDT) Received: by mail-yb1-xb4a.google.com with SMTP id j5-20020a056902020500b00628ab64be30so14989680ybs.16 for ; Mon, 14 Mar 2022 15:19:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=date:message-id:mime-version:subject:from:to:cc; bh=PUbw9oR4TOWQqbTABcpCBiJL0Yev5THBA5pdKZN8yvA=; b=J1hE3hHr1zsdx2TTT9uQ8g+cnB6YxCSxV/wyXzB5ur+pe3dFPt3rEDefpO4XE55lsi 8gZiynrR3zS+GagnwyB0TvwYdmUul0KHqjqaIgpD5T46pJmV0OASYur87Q7bFLZiNDL9 2ZmcmF7zGimVqA9byNlp52uJl4VPvf93OGjKWOHQ1dlyii6F67dB9vyYXwt4snrOVhRO aRC6Uir5qzkUNS4BGa4DvdECbKXrWaq5ZffLZWKmDXltB+6n9bktUoRYgRJbAnF4rZSO coryXU4576gWvx5IoZQz+Vdu7MFNiBcenKyUl7qG3OLRplbEr8GhlIVXm2xJelcBJNVD sMPQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:message-id:mime-version:subject:from:to:cc; bh=PUbw9oR4TOWQqbTABcpCBiJL0Yev5THBA5pdKZN8yvA=; b=2SLeQvvSiCDbxHM+nM2V6vx8Ercrqv9MTYR0AmnZDJAUv8aPz5S0zuEr6e6DIt6oaH yycB4fCR7VsKAiY7R6YtYFR73kQngmujgFrH/5ajFOXP+lRLxC4gTOGgSTjdHMJKnyX0 6nV0Y6GYpLxqldeBXsnFYQIeyLY7DB2VVx88PuMNQmlEfflOz1+L921SXfeV86akV1kz R+Fn4DFEQ2h0Zryfp3nMzZM0nX4OPWa+8RYwcn+gZiD3ObcHFhoMp3copKfWdXMM959w LDeCRNRHhgEfndiGnSTzsGjT7ta6rcCVTy1K0i7KIxUHIxCa2db6vrZCdFH3CY/SWZNJ 5DOw== X-Gm-Message-State: AOAM5315kJz3lyg5JRPK626Ji55pXPBiLtyzF8ivI7CRk/pq5eZWn6eV H2BFr6TTP3gvKWBiA5ASEJMofN8tjA4i77Ldgdg= X-Google-Smtp-Source: ABdhPJyVdzLvoXd1ovJfPXOpK4i088ln7nkAB8by2vP1a15Mrq9AQrg9C6VUjpBiPOWFoO0KptOWMVCryVCPZwLSxY0= X-Received: from ndesaulniers1.mtv.corp.google.com ([2620:15c:211:202:eff1:725e:2848:530f]) (user=ndesaulniers job=sendgmr) by 2002:a5b:7cf:0:b0:623:df1c:b83d with SMTP id t15-20020a5b07cf000000b00623df1cb83dmr20604797ybq.75.1647296361448; Mon, 14 Mar 2022 15:19:21 -0700 (PDT) Date: Mon, 14 Mar 2022 15:19:03 -0700 Message-Id: <20220314221909.2027027-1-ndesaulniers@google.com> Mime-Version: 1.0 X-Developer-Key: i=ndesaulniers@google.com; a=ed25519; pk=lvO/pmg+aaCb6dPhyGC1GyOCvPueDrrc8Zeso5CaGKE= X-Developer-Signature: v=1; a=ed25519-sha256; t=1647296343; l=8543; s=20211004; h=from:subject; bh=/onzoCSytyNT3SABwW/OByMJJIxIi8oEiyApyZBwU0U=; b=E+R0wTk1bVgZLouAH40yCEBUVKAcS1zwU8U71ZI/iiVQFeBG4+m1x/2/gvtH8niazhrp3Bn/yx2d /snHQfSVAOa+pZQIMJOV1CmVLD3K6sFRL3Xkykt9GB5kiposo2GQ X-Mailer: git-send-email 2.35.1.723.g4982287a31-goog Subject: [PATCH] lockdep: fix -Wunused-parameter for _THIS_IP_ From: Nick Desaulniers To: Ingo Molnar , Waiman Long , Boqun Feng Cc: Nick Desaulniers , Catalin Marinas , Will Deacon , Paolo Bonzini , Thomas Gleixner , Peter Zijlstra , Andy Lutomirski , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Daniel Bristot de Oliveira , Mark Rutland , Joey Gouly , Marc Zyngier , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org While looking into a bug related to the compiler's handling of addresses of labels, I noticed some uses of _THIS_IP_ seemed unused in lockdep. Drive by cleanup. -Wunused-parameter: kernel/locking/lockdep.c:1383:22: warning: unused parameter 'ip' kernel/locking/lockdep.c:4246:48: warning: unused parameter 'ip' kernel/locking/lockdep.c:4844:19: warning: unused parameter 'ip' Signed-off-by: Nick Desaulniers --- arch/arm64/kernel/entry-common.c | 8 ++++---- include/linux/irqflags.h | 4 ++-- include/linux/kvm_host.h | 2 +- kernel/entry/common.c | 6 +++--- kernel/locking/lockdep.c | 22 ++++++++-------------- kernel/sched/idle.c | 2 +- kernel/trace/trace_preemptirq.c | 4 ++-- 7 files changed, 21 insertions(+), 27 deletions(-) diff --git a/arch/arm64/kernel/entry-common.c b/arch/arm64/kernel/entry-common.c index ef7fcefb96bd..8a4244316e25 100644 --- a/arch/arm64/kernel/entry-common.c +++ b/arch/arm64/kernel/entry-common.c @@ -73,7 +73,7 @@ static __always_inline void __exit_to_kernel_mode(struct pt_regs *regs) if (interrupts_enabled(regs)) { if (regs->exit_rcu) { trace_hardirqs_on_prepare(); - lockdep_hardirqs_on_prepare(CALLER_ADDR0); + lockdep_hardirqs_on_prepare(); rcu_irq_exit(); lockdep_hardirqs_on(CALLER_ADDR0); return; @@ -118,7 +118,7 @@ static __always_inline void enter_from_user_mode(struct pt_regs *regs) static __always_inline void __exit_to_user_mode(void) { trace_hardirqs_on_prepare(); - lockdep_hardirqs_on_prepare(CALLER_ADDR0); + lockdep_hardirqs_on_prepare(); user_enter_irqoff(); lockdep_hardirqs_on(CALLER_ADDR0); } @@ -176,7 +176,7 @@ static void noinstr arm64_exit_nmi(struct pt_regs *regs) ftrace_nmi_exit(); if (restore) { trace_hardirqs_on_prepare(); - lockdep_hardirqs_on_prepare(CALLER_ADDR0); + lockdep_hardirqs_on_prepare(); } rcu_nmi_exit(); @@ -212,7 +212,7 @@ static void noinstr arm64_exit_el1_dbg(struct pt_regs *regs) if (restore) { trace_hardirqs_on_prepare(); - lockdep_hardirqs_on_prepare(CALLER_ADDR0); + lockdep_hardirqs_on_prepare(); } rcu_nmi_exit(); diff --git a/include/linux/irqflags.h b/include/linux/irqflags.h index 4b140938b03e..5ec0fa71399e 100644 --- a/include/linux/irqflags.h +++ b/include/linux/irqflags.h @@ -20,13 +20,13 @@ #ifdef CONFIG_PROVE_LOCKING extern void lockdep_softirqs_on(unsigned long ip); extern void lockdep_softirqs_off(unsigned long ip); - extern void lockdep_hardirqs_on_prepare(unsigned long ip); + extern void lockdep_hardirqs_on_prepare(void); extern void lockdep_hardirqs_on(unsigned long ip); extern void lockdep_hardirqs_off(unsigned long ip); #else static inline void lockdep_softirqs_on(unsigned long ip) { } static inline void lockdep_softirqs_off(unsigned long ip) { } - static inline void lockdep_hardirqs_on_prepare(unsigned long ip) { } + static inline void lockdep_hardirqs_on_prepare(void) { } static inline void lockdep_hardirqs_on(unsigned long ip) { } static inline void lockdep_hardirqs_off(unsigned long ip) { } #endif diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index f11039944c08..f32bed70a5c5 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -441,7 +441,7 @@ static __always_inline void guest_state_enter_irqoff(void) { instrumentation_begin(); trace_hardirqs_on_prepare(); - lockdep_hardirqs_on_prepare(CALLER_ADDR0); + lockdep_hardirqs_on_prepare(); instrumentation_end(); guest_context_enter_irqoff(); diff --git a/kernel/entry/common.c b/kernel/entry/common.c index bad713684c2e..3ce3a0a6c762 100644 --- a/kernel/entry/common.c +++ b/kernel/entry/common.c @@ -124,7 +124,7 @@ static __always_inline void __exit_to_user_mode(void) { instrumentation_begin(); trace_hardirqs_on_prepare(); - lockdep_hardirqs_on_prepare(CALLER_ADDR0); + lockdep_hardirqs_on_prepare(); instrumentation_end(); user_enter_irqoff(); @@ -412,7 +412,7 @@ noinstr void irqentry_exit(struct pt_regs *regs, irqentry_state_t state) instrumentation_begin(); /* Tell the tracer that IRET will enable interrupts */ trace_hardirqs_on_prepare(); - lockdep_hardirqs_on_prepare(CALLER_ADDR0); + lockdep_hardirqs_on_prepare(); instrumentation_end(); rcu_irq_exit(); lockdep_hardirqs_on(CALLER_ADDR0); @@ -465,7 +465,7 @@ void noinstr irqentry_nmi_exit(struct pt_regs *regs, irqentry_state_t irq_state) ftrace_nmi_exit(); if (irq_state.lockdep) { trace_hardirqs_on_prepare(); - lockdep_hardirqs_on_prepare(CALLER_ADDR0); + lockdep_hardirqs_on_prepare(); } instrumentation_end(); diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c index f8a0212189ca..05604795b39c 100644 --- a/kernel/locking/lockdep.c +++ b/kernel/locking/lockdep.c @@ -1378,7 +1378,7 @@ static struct lock_list *alloc_list_entry(void) */ static int add_lock_to_list(struct lock_class *this, struct lock_class *links_to, struct list_head *head, - unsigned long ip, u16 distance, u8 dep, + u16 distance, u8 dep, const struct lock_trace *trace) { struct lock_list *entry; @@ -3131,19 +3131,15 @@ check_prev_add(struct task_struct *curr, struct held_lock *prev, * to the previous lock's dependency list: */ ret = add_lock_to_list(hlock_class(next), hlock_class(prev), - &hlock_class(prev)->locks_after, - next->acquire_ip, distance, - calc_dep(prev, next), - *trace); + &hlock_class(prev)->locks_after, distance, + calc_dep(prev, next), *trace); if (!ret) return 0; ret = add_lock_to_list(hlock_class(prev), hlock_class(next), - &hlock_class(next)->locks_before, - next->acquire_ip, distance, - calc_depb(prev, next), - *trace); + &hlock_class(next)->locks_before, distance, + calc_depb(prev, next), *trace); if (!ret) return 0; @@ -4234,14 +4230,13 @@ static void __trace_hardirqs_on_caller(void) /** * lockdep_hardirqs_on_prepare - Prepare for enabling interrupts - * @ip: Caller address * * Invoked before a possible transition to RCU idle from exit to user or * guest mode. This ensures that all RCU operations are done before RCU * stops watching. After the RCU transition lockdep_hardirqs_on() has to be * invoked to set the final state. */ -void lockdep_hardirqs_on_prepare(unsigned long ip) +void lockdep_hardirqs_on_prepare(void) { if (unlikely(!debug_locks)) return; @@ -4838,8 +4833,7 @@ EXPORT_SYMBOL_GPL(__lockdep_no_validate__); static void print_lock_nested_lock_not_held(struct task_struct *curr, - struct held_lock *hlock, - unsigned long ip) + struct held_lock *hlock) { if (!debug_locks_off()) return; @@ -5015,7 +5009,7 @@ static int __lock_acquire(struct lockdep_map *lock, unsigned int subclass, chain_key = iterate_chain_key(chain_key, hlock_id(hlock)); if (nest_lock && !__lock_is_held(nest_lock, -1)) { - print_lock_nested_lock_not_held(curr, hlock, ip); + print_lock_nested_lock_not_held(curr, hlock); return 0; } diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c index d17b0a5ce6ac..499a3e286cd0 100644 --- a/kernel/sched/idle.c +++ b/kernel/sched/idle.c @@ -105,7 +105,7 @@ void __cpuidle default_idle_call(void) * last -- this is very similar to the entry code. */ trace_hardirqs_on_prepare(); - lockdep_hardirqs_on_prepare(_THIS_IP_); + lockdep_hardirqs_on_prepare(); rcu_idle_enter(); lockdep_hardirqs_on(_THIS_IP_); diff --git a/kernel/trace/trace_preemptirq.c b/kernel/trace/trace_preemptirq.c index f4938040c228..95b58bd757ce 100644 --- a/kernel/trace/trace_preemptirq.c +++ b/kernel/trace/trace_preemptirq.c @@ -46,7 +46,7 @@ void trace_hardirqs_on(void) this_cpu_write(tracing_irq_cpu, 0); } - lockdep_hardirqs_on_prepare(CALLER_ADDR0); + lockdep_hardirqs_on_prepare(); lockdep_hardirqs_on(CALLER_ADDR0); } EXPORT_SYMBOL(trace_hardirqs_on); @@ -94,7 +94,7 @@ __visible void trace_hardirqs_on_caller(unsigned long caller_addr) this_cpu_write(tracing_irq_cpu, 0); } - lockdep_hardirqs_on_prepare(CALLER_ADDR0); + lockdep_hardirqs_on_prepare(); lockdep_hardirqs_on(CALLER_ADDR0); } EXPORT_SYMBOL(trace_hardirqs_on_caller); -- 2.35.1.723.g4982287a31-goog