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 076F4C433F5 for ; Tue, 25 Jan 2022 03:17:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1356159AbiAYDQk (ORCPT ); Mon, 24 Jan 2022 22:16:40 -0500 Received: from lgeamrelo12.lge.com ([156.147.23.52]:49049 "EHLO lgeamrelo11.lge.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1318652AbiAYDGv (ORCPT ); Mon, 24 Jan 2022 22:06:51 -0500 Received: from unknown (HELO lgeamrelo02.lge.com) (156.147.1.126) by 156.147.23.52 with ESMTP; 25 Jan 2022 11:36:47 +0900 X-Original-SENDERIP: 156.147.1.126 X-Original-MAILFROM: byungchul.park@lge.com Received: from unknown (HELO localhost.localdomain) (10.177.244.38) by 156.147.1.126 with ESMTP; 25 Jan 2022 11:36:47 +0900 X-Original-SENDERIP: 10.177.244.38 X-Original-MAILFROM: byungchul.park@lge.com From: Byungchul Park To: torvalds@linux-foundation.org, mingo@redhat.com, linux-kernel@vger.kernel.org Cc: peterz@infradead.org, will@kernel.org, tglx@linutronix.de, rostedt@goodmis.org, joel@joelfernandes.org, sashal@kernel.org, daniel.vetter@ffwll.ch, chris@chris-wilson.co.uk, duyuyang@gmail.com, johannes.berg@intel.com, tj@kernel.org, tytso@mit.edu, willy@infradead.org, david@fromorbit.com, amir73il@gmail.com, bfields@fieldses.org, gregkh@linuxfoundation.org, kernel-team@lge.com Subject: [RFC 09/14] dept: Apply Dept to rwsem Date: Tue, 25 Jan 2022 11:36:39 +0900 Message-Id: <1643078204-12663-10-git-send-email-byungchul.park@lge.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1643078204-12663-1-git-send-email-byungchul.park@lge.com> References: <1643078204-12663-1-git-send-email-byungchul.park@lge.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Makes Dept able to track dependencies by rwsem. Signed-off-by: Byungchul Park --- include/linux/lockdep.h | 24 ++++++++++++++++++++---- include/linux/percpu-rwsem.h | 10 +++++++++- include/linux/rwsem.h | 31 +++++++++++++++++++++++++++++++ 3 files changed, 60 insertions(+), 5 deletions(-) diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h index 4653df7..80e665e 100644 --- a/include/linux/lockdep.h +++ b/include/linux/lockdep.h @@ -628,10 +628,26 @@ static inline void print_irqtrace_events(struct task_struct *curr) dept_mutex_unlock(&(l)->dmap, i); \ } while (0) -#define rwsem_acquire(l, s, t, i) lock_acquire_exclusive(l, s, t, NULL, i) -#define rwsem_acquire_nest(l, s, t, n, i) lock_acquire_exclusive(l, s, t, n, i) -#define rwsem_acquire_read(l, s, t, i) lock_acquire_shared(l, s, t, NULL, i) -#define rwsem_release(l, i) lock_release(l, i) +#define rwsem_acquire(l, s, t, i) \ +do { \ + lock_acquire_exclusive(l, s, t, NULL, i); \ + dept_rwsem_lock(&(l)->dmap, s, t, NULL, "up_write", i); \ +} while (0) +#define rwsem_acquire_nest(l, s, t, n, i) \ +do { \ + lock_acquire_exclusive(l, s, t, n, i); \ + dept_rwsem_lock(&(l)->dmap, s, t, (n) ? &(n)->dmap : NULL, "up_write", i);\ +} while (0) +#define rwsem_acquire_read(l, s, t, i) \ +do { \ + lock_acquire_shared(l, s, t, NULL, i); \ + dept_rwsem_lock(&(l)->dmap, s, t, NULL, "up_read", i); \ +} while (0) +#define rwsem_release(l, i) \ +do { \ + lock_release(l, i); \ + dept_rwsem_unlock(&(l)->dmap, i); \ +} while (0) #define lock_map_acquire(l) lock_acquire_exclusive(l, 0, 0, NULL, _THIS_IP_) #define lock_map_acquire_read(l) lock_acquire_shared_recursive(l, 0, 0, NULL, _THIS_IP_) diff --git a/include/linux/percpu-rwsem.h b/include/linux/percpu-rwsem.h index 5fda40f..7ec5625 100644 --- a/include/linux/percpu-rwsem.h +++ b/include/linux/percpu-rwsem.h @@ -20,8 +20,16 @@ struct percpu_rw_semaphore { #endif }; +#ifdef CONFIG_DEPT +#define __PERCPU_RWSEM_DMAP_INIT(lockname) .dmap = { .name = #lockname } +#else +#define __PERCPU_RWSEM_DMAP_INIT(lockname) +#endif + #ifdef CONFIG_DEBUG_LOCK_ALLOC -#define __PERCPU_RWSEM_DEP_MAP_INIT(lockname) .dep_map = { .name = #lockname }, +#define __PERCPU_RWSEM_DEP_MAP_INIT(lockname) .dep_map = { \ + .name = #lockname, \ + __PERCPU_RWSEM_DMAP_INIT(lockname) }, #else #define __PERCPU_RWSEM_DEP_MAP_INIT(lockname) #endif diff --git a/include/linux/rwsem.h b/include/linux/rwsem.h index 25e3fde8..b4a266f 100644 --- a/include/linux/rwsem.h +++ b/include/linux/rwsem.h @@ -20,6 +20,30 @@ #include #endif +#ifdef CONFIG_DEPT +#define dept_rwsem_lock(m, ne, t, n, e_fn, ip) \ +do { \ + if (t) { \ + dept_ecxt_enter(m, 1UL, ip, __func__, e_fn, ne); \ + dept_asked_event(m); \ + } else if (n) { \ + dept_warn_on(dept_top_map() != (n)); \ + } else { \ + dept_wait(m, 1UL, ip, __func__, ne); \ + dept_ecxt_enter(m, 1UL, ip, __func__, e_fn, ne); \ + dept_asked_event(m); \ + } \ +} while (0) +#define dept_rwsem_unlock(m, ip) \ +do { \ + dept_event(m, 1UL, ip, __func__); \ + dept_ecxt_exit(m, ip); \ +} while (0) +#else +#define dept_rwsem_lock(m, ne, t, n, e_fn, ip) do { } while (0) +#define dept_rwsem_unlock(m, ip) do { } while (0) +#endif + /* * For an uncontended rwsem, count and owner are the only fields a task * needs to touch when acquiring the rwsem. So they are put next to each @@ -64,11 +88,18 @@ static inline int rwsem_is_locked(struct rw_semaphore *sem) /* Common initializer macros and functions */ +#ifdef CONFIG_DEPT +# define RWSEM_DMAP_INIT(lockname) .dmap = { .name = #lockname }, +#else +# define RWSEM_DMAP_INIT(lockname) +#endif + #ifdef CONFIG_DEBUG_LOCK_ALLOC # define __RWSEM_DEP_MAP_INIT(lockname) \ .dep_map = { \ .name = #lockname, \ .wait_type_inner = LD_WAIT_SLEEP, \ + RWSEM_DMAP_INIT(lockname) \ }, #else # define __RWSEM_DEP_MAP_INIT(lockname) -- 1.9.1