From: Yuyang Du <duyuyang@gmail.com>
To: peterz@infradead.org, will.deacon@arm.com, mingo@kernel.org
Cc: bvanassche@acm.org, ming.lei@redhat.com, frederic@kernel.org,
tglx@linutronix.de, linux-kernel@vger.kernel.org,
Yuyang Du <duyuyang@gmail.com>
Subject: [PATCH 26/28] locking/lockdep: Remove __bfs
Date: Wed, 24 Apr 2019 18:19:32 +0800 [thread overview]
Message-ID: <20190424101934.51535-27-duyuyang@gmail.com> (raw)
In-Reply-To: <20190424101934.51535-1-duyuyang@gmail.com>
Since there is no need for backward dependecy searching, remove this
extra function layer.
Signed-off-by: Yuyang Du <duyuyang@gmail.com>
---
kernel/locking/lockdep.c | 40 +++++++---------------------------------
1 file changed, 7 insertions(+), 33 deletions(-)
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index 06ae87f..acaa3b3 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -1393,27 +1393,13 @@ static inline int get_lock_depth(struct lock_list *child)
}
/*
- * Return the forward or backward dependency list.
- *
- * @lock: the lock_list to get its class's dependency list
- * @offset: the offset to struct lock_class to determine whether it is
- * locks_after or locks_before
- */
-static inline struct list_head *get_dep_list(struct lock_list *lock, int offset)
-{
- void *lock_class = lock->class;
-
- return lock_class + offset;
-}
-
-/*
- * Forward- or backward-dependency search, used for both circular dependency
+ * Forward-dependency search, used for both circular dependency
* checking and hardirq-unsafe/softirq-unsafe checking.
*/
-static int __bfs(struct lock_list *source_entry, void *data,
- int (*match)(struct lock_list *entry, void *data),
- struct lock_list **target_entry, int offset, int index,
- int distance, struct lock_class *safe_lock, bool reach)
+static int __bfs_forwards(struct lock_list *source_entry, void *data,
+ int (*match)(struct lock_list *entry, void *data),
+ struct lock_list **target_entry, int index,
+ int distance, struct lock_class *safe_lock, bool reach)
{
struct lock_list *entry;
struct lock_list *lock;
@@ -1429,7 +1415,7 @@ static int __bfs(struct lock_list *source_entry, void *data,
goto exit;
}
- head = get_dep_list(source_entry, offset);
+ head = &source_entry->class->locks_after;
if (list_empty(head))
goto exit;
@@ -1443,7 +1429,7 @@ static int __bfs(struct lock_list *source_entry, void *data,
goto exit;
}
- head = get_dep_list(lock, offset);
+ head = &lock->class->locks_after;
DEBUG_LOCKS_WARN_ON(!irqs_disabled());
@@ -1475,18 +1461,6 @@ static int __bfs(struct lock_list *source_entry, void *data,
return ret;
}
-static inline int __bfs_forwards(struct lock_list *src_entry, void *data,
- int (*match)(struct lock_list *entry, void *data),
- struct lock_list **target_entry, int index,
- int distance, struct lock_class *safe_lock,
- bool reach)
-{
- return __bfs(src_entry, data, match, target_entry,
- offsetof(struct lock_class, locks_after),
- index, distance, safe_lock, reach);
-
-}
-
static void print_lock_trace(struct lock_trace *trace, unsigned int spaces)
{
unsigned long *entries = stack_trace + trace->offset;
--
1.8.3.1
next prev parent reply other threads:[~2019-04-24 10:21 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-24 10:19 [PATCH 00/28] Optimize IRQ usage checks and other small bits Yuyang Du
2019-04-24 10:19 ` [PATCH 01/28] locking/lockdep: Change all print_*() return type to void Yuyang Du
2019-04-24 10:19 ` [PATCH 02/28] locking/lockdep: Add description and explanation in lockdep design doc Yuyang Du
2019-04-25 14:01 ` Peter Zijlstra
2019-04-26 5:41 ` Yuyang Du
2019-04-24 10:19 ` [PATCH 03/28] locking/lockdep: Adjust lock usage bit character checks Yuyang Du
2019-04-24 10:19 ` [PATCH 04/28] locking/lockdep: Remove useless conditional macro Yuyang Du
2019-04-24 10:19 ` [PATCH 05/28] locking/lockdep: Print the right depth for chain key colission Yuyang Du
2019-04-24 10:19 ` [PATCH 06/28] locking/lockdep: Update obsolete struct field description Yuyang Du
2019-04-24 10:19 ` [PATCH 07/28] locking/lockdep: Use lockdep_init_task for task initiation consistently Yuyang Du
2019-04-24 10:19 ` [PATCH 08/28] locking/lockdep: Define INITIAL_CHAIN_KEY for chain keys to start with Yuyang Du
2019-04-24 10:19 ` [PATCH 09/28] locking/lockdep: Change the range of class_idx in held_lock struct Yuyang Du
2019-04-24 10:19 ` [PATCH 10/28] locking/lockdep: Remove unused argument in validate_chain() and check_deadlock() Yuyang Du
2019-04-24 10:19 ` [PATCH 11/28] locking/lockdep: Update comment Yuyang Du
2019-04-24 10:19 ` [PATCH 12/28] locking/lockdep: Change type of the element field in circular_queue Yuyang Du
2019-04-24 10:19 ` [PATCH 13/28] locking/lockdep: Change the return type of __cq_dequeue() Yuyang Du
2019-04-24 10:19 ` [PATCH 14/28] locking/lockdep: Avoid constant checks in __bfs by using offset reference Yuyang Du
2019-04-24 10:19 ` [PATCH 15/28] locking/lockdep: Update comments on dependency search Yuyang Du
2019-04-24 10:19 ` [PATCH 16/28] locking/lockdep: Add explanation to lock usage rules in lockdep design doc Yuyang Du
2019-04-24 10:19 ` [PATCH 17/28] locking/lockdep: Remove redundant argument in check_deadlock Yuyang Du
2019-04-24 10:19 ` [PATCH 18/28] locking/lockdep: Remove unused argument in __lock_release Yuyang Du
2019-04-24 10:19 ` [PATCH 19/28] locking/lockdep: Optimize irq usage check when marking lock usage bit Yuyang Du
2019-04-25 19:32 ` Peter Zijlstra
2019-04-26 6:57 ` Yuyang Du
2019-04-30 12:11 ` Peter Zijlstra
2019-05-06 3:05 ` Yuyang Du
2019-05-06 3:42 ` Yuyang Du
2019-05-07 1:47 ` Frederic Weisbecker
2019-05-07 2:21 ` Yuyang Du
2019-04-24 10:19 ` [PATCH 20/28] locking/lockdep: Refactorize check_noncircular and check_redundant Yuyang Du
2019-04-25 19:48 ` Peter Zijlstra
2019-04-26 6:48 ` Yuyang Du
2019-04-24 10:19 ` [PATCH 21/28] locking/lockdep: Consolidate lock usage bit initialization Yuyang Du
2019-04-24 10:19 ` [PATCH 22/28] locking/lockdep: Adjust new bit cases in mark_lock Yuyang Du
2019-04-25 19:52 ` Peter Zijlstra
2019-04-26 6:47 ` Yuyang Du
2019-04-24 10:19 ` [PATCH 23/28] locking/lockdep: Update irqsafe lock bitmaps Yuyang Du
2019-04-25 19:55 ` Peter Zijlstra
2019-04-26 6:45 ` Yuyang Du
2019-04-24 10:19 ` [PATCH 24/28] locking/lockdep: Remove !dir in lock irq usage check Yuyang Du
2019-04-25 20:03 ` Peter Zijlstra
2019-04-26 7:06 ` Yuyang Du
2019-04-26 7:25 ` Boqun Feng
2019-04-30 15:35 ` Peter Zijlstra
2019-04-24 10:19 ` [PATCH 25/28] locking/lockdep: Implement new IRQ usage checking algorithm Yuyang Du
2019-04-24 10:19 ` Yuyang Du [this message]
2019-04-25 20:06 ` [PATCH 26/28] locking/lockdep: Remove __bfs Peter Zijlstra
2019-04-26 6:35 ` Yuyang Du
2019-04-24 10:19 ` [PATCH 27/28] locking/lockdep: Remove locks_before Yuyang Du
2019-04-24 10:19 ` [PATCH 28/28] locking/lockdep: Reduce lock_list_entries by half Yuyang Du
2019-04-25 18:56 ` [PATCH 00/28] Optimize IRQ usage checks and other small bits Peter Zijlstra
2019-04-26 6:59 ` Yuyang Du
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