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 X-Spam-Level: X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4A47BC432BE for ; Sun, 15 Aug 2021 21:31:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 33C4F6137A for ; Sun, 15 Aug 2021 21:31:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234068AbhHOVcU (ORCPT ); Sun, 15 Aug 2021 17:32:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59766 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230509AbhHOV3Z (ORCPT ); Sun, 15 Aug 2021 17:29:25 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id ED255C0617AD for ; Sun, 15 Aug 2021 14:28:53 -0700 (PDT) Message-ID: <20210815211304.734635961@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1629062932; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: references:references; bh=lzQ6SJUWO+cQIKpc/IWE3nb8cj8Ps+LzIGeiMNlvMc8=; b=W1BNXuTI1V7+XfSS7xZDsJvZyxsQS6PmVSyitSiZ4oIgRpeeMcPI+yBmaMacBNlt3PwVJo 9EORe6hmFlSpFOOKJNBGb06+WO4u/d55ufg3NjOiPuPAPTKwBpe6oTwoRd6USNLowffWXD uj/0IiRPj+jrWn91E9KH2qiTBLe1aw96wlPZ/JRSRG4X75+mz3/2VJuuS6PRzTvdXhG+1y 8DgxcoUrdf8VRvUaWuh/oisZylRLeyUvvAQWorlUq0JxFTPmM5lYA1I31PYFHMq1XBKElx KhBXthHAQeeg0nDZ6gizDI6fbXbzbh21e2+/GFm4aQuWJHdQCCXMUU4b+vz7iA== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1629062932; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: references:references; bh=lzQ6SJUWO+cQIKpc/IWE3nb8cj8Ps+LzIGeiMNlvMc8=; b=fB6c0tk+PBI8A2l4+JWBGBHIF4H0YMHgnpsFyoqy77zTM1Sn+tmtBVol5tFdjnRR8wIuKv iEzeFP5cJ55ajKAA== From: Thomas Gleixner To: LKML Cc: Peter Zijlstra , Ingo Molnar , Juri Lelli , Steven Rostedt , Daniel Bristot de Oliveira , Will Deacon , Waiman Long , Boqun Feng , Sebastian Andrzej Siewior , Davidlohr Bueso , Mike Galbraith Subject: [patch V5 49/72] locking/ww_mutex: Abstract internal lock access References: <20210815203225.710392609@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-transfer-encoding: 8-bit Date: Sun, 15 Aug 2021 23:28:52 +0200 (CEST) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Accessing the internal wait_lock of mutex and rtmutex is slightly different. Provide helper functions for that. Signed-off-by: Thomas Gleixner --- include/linux/ww_mutex.h | 13 +++++++++---- kernel/locking/ww_mutex.h | 23 +++++++++++++++++++---- 2 files changed, 28 insertions(+), 8 deletions(-) --- a/include/linux/ww_mutex.h +++ b/include/linux/ww_mutex.h @@ -19,6 +19,11 @@ #include +#define WW_MUTEX_BASE mutex +#define ww_mutex_base_init(l,n,k) __mutex_init(l,n,k) +#define ww_mutex_base_trylock(l) mutex_trylock(l) +#define ww_mutex_base_is_locked(b) mutex_is_locked((b)) + struct ww_class { atomic_long_t stamp; struct lock_class_key acquire_key; @@ -29,7 +34,7 @@ struct ww_class { }; struct ww_mutex { - struct mutex base; + struct WW_MUTEX_BASE base; struct ww_acquire_ctx *ctx; #ifdef CONFIG_DEBUG_MUTEXES struct ww_class *ww_class; @@ -82,7 +87,7 @@ struct ww_acquire_ctx { static inline void ww_mutex_init(struct ww_mutex *lock, struct ww_class *ww_class) { - __mutex_init(&lock->base, ww_class->mutex_name, &ww_class->mutex_key); + ww_mutex_base_init(&lock->base, ww_class->mutex_name, &ww_class->mutex_key); lock->ctx = NULL; #ifdef CONFIG_DEBUG_MUTEXES lock->ww_class = ww_class; @@ -330,7 +335,7 @@ extern void ww_mutex_unlock(struct ww_mu */ static inline int __must_check ww_mutex_trylock(struct ww_mutex *lock) { - return mutex_trylock(&lock->base); + return ww_mutex_base_trylock(&lock->base); } /*** @@ -354,7 +359,7 @@ static inline void ww_mutex_destroy(stru */ static inline bool ww_mutex_is_locked(struct ww_mutex *lock) { - return mutex_is_locked(&lock->base); + return ww_mutex_base_is_locked(&lock->base); } #endif --- a/kernel/locking/ww_mutex.h +++ b/kernel/locking/ww_mutex.h @@ -68,6 +68,21 @@ static inline bool return atomic_long_read(&lock->owner) & MUTEX_FLAG_WAITERS; } +static inline void lock_wait_lock(struct mutex *lock) +{ + raw_spin_lock(&lock->wait_lock); +} + +static inline void unlock_wait_lock(struct mutex *lock) +{ + raw_spin_unlock(&lock->wait_lock); +} + +static inline void lockdep_assert_wait_lock_held(struct mutex *lock) +{ + lockdep_assert_held(&lock->wait_lock); +} + /* * Wait-Die: * The newer transactions are killed when: @@ -174,7 +189,7 @@ static bool __ww_mutex_wound(struct MUTE { struct task_struct *owner = __ww_mutex_owner(lock); - lockdep_assert_held(&lock->wait_lock); + lockdep_assert_wait_lock_held(lock); /* * Possible through __ww_mutex_add_waiter() when we race with @@ -227,7 +242,7 @@ static void { struct MUTEX_WAITER *cur; - lockdep_assert_held(&lock->wait_lock); + lockdep_assert_wait_lock_held(lock); for (cur = __ww_waiter_first(lock); cur; cur = __ww_waiter_next(lock, cur)) { @@ -275,9 +290,9 @@ ww_mutex_set_context_fastpath(struct ww_ * Uh oh, we raced in fastpath, check if any of the waiters need to * die or wound us. */ - raw_spin_lock(&lock->base.wait_lock); + lock_wait_lock(&lock->base); __ww_mutex_check_waiters(&lock->base, ctx); - raw_spin_unlock(&lock->base.wait_lock); + unlock_wait_lock(&lock->base); } static __always_inline int