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 E7E03C54EE9 for ; Fri, 16 Sep 2022 10:20:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231737AbiIPKUg (ORCPT ); Fri, 16 Sep 2022 06:20:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37310 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231776AbiIPKSq (ORCPT ); Fri, 16 Sep 2022 06:18:46 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 097F7AFAE0; Fri, 16 Sep 2022 03:12:40 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id EB5E6B8254A; Fri, 16 Sep 2022 10:12:10 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 44F4DC4347C; Fri, 16 Sep 2022 10:12:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1663323129; bh=31cipC14mZdElOYJ3XaK0RkFetdmF8bn+WnQfJyPShA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=HJgfZUpm0J6mNvyBTPHBDu7Abi9OEetaOYJlM+2pkSG/oXJe4n/ukaagANFBwJKlQ OjQ/ajUwrri9BVe8qbHNoRksrIMvx2h7DOKcKW7urTRYhgt1q3jg3tYeO921S1rXGC EspJddEvZoDUzJMTky9Y4tnyXyUn7CLnArDPcQkk= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Nick Desaulniers , "Peter Zijlstra (Intel)" , Waiman Long , Sasha Levin Subject: [PATCH 5.15 07/35] lockdep: Fix -Wunused-parameter for _THIS_IP_ Date: Fri, 16 Sep 2022 12:08:30 +0200 Message-Id: <20220916100447.248166318@linuxfoundation.org> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20220916100446.916515275@linuxfoundation.org> References: <20220916100446.916515275@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Nick Desaulniers [ Upstream commit 8b023accc8df70e72f7704d29fead7ca914d6837 ] 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 Signed-off-by: Peter Zijlstra (Intel) Acked-by: Waiman Long Link: https://lore.kernel.org/r/20220314221909.2027027-1-ndesaulniers@google.com Stable-dep-of: 54c3931957f6 ("tracing: hold caller_addr to hardirq_{enable,disable}_ip") Signed-off-by: Sasha Levin --- arch/arm64/kernel/entry-common.c | 8 ++++---- arch/x86/kvm/x86.h | 2 +- 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 ++-- 8 files changed, 22 insertions(+), 28 deletions(-) diff --git a/arch/arm64/kernel/entry-common.c b/arch/arm64/kernel/entry-common.c index 32f9796c4ffe7..60225bc09b017 100644 --- a/arch/arm64/kernel/entry-common.c +++ b/arch/arm64/kernel/entry-common.c @@ -72,7 +72,7 @@ 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; @@ -117,7 +117,7 @@ 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); } @@ -175,7 +175,7 @@ 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(); @@ -211,7 +211,7 @@ 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/arch/x86/kvm/x86.h b/arch/x86/kvm/x86.h index 4d6f7a70bdd14..cd0c93ec72fad 100644 --- a/arch/x86/kvm/x86.h +++ b/arch/x86/kvm/x86.h @@ -26,7 +26,7 @@ static __always_inline void kvm_guest_enter_irqoff(void) */ instrumentation_begin(); trace_hardirqs_on_prepare(); - lockdep_hardirqs_on_prepare(CALLER_ADDR0); + lockdep_hardirqs_on_prepare(); instrumentation_end(); guest_enter_irqoff(); diff --git a/include/linux/irqflags.h b/include/linux/irqflags.h index 600c10da321a7..747f40e0c3260 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 fb70dd4ff3b60..38b7e9ab48b84 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -436,7 +436,7 @@ 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 d5a61d565ad5d..998bdb7b8bf7f 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 120bbdacd58bb..e6a282bc16652 100644 --- a/kernel/locking/lockdep.c +++ b/kernel/locking/lockdep.c @@ -1368,7 +1368,7 @@ 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; @@ -3121,19 +3121,15 @@ 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; @@ -4224,14 +4220,13 @@ 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; @@ -4828,8 +4823,7 @@ 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; @@ -5005,7 +4999,7 @@ 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 d17b0a5ce6ac3..499a3e286cd05 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 f4938040c2286..95b58bd757ce4 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