lkml.org 
[lkml]   [2019]   [Jun]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v3 24/30] locking/lockdep: Introduce mark_lock_unaccessed()
Date
Since in graph search, multiple matches may be needed, a matched lock
needs to rejoin the search for another match, thereby introduce
mark_lock_unaccessed().

Signed-off-by: Yuyang Du <duyuyang@gmail.com>
---
kernel/locking/lockdep.c | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index 444eb62..e7610d2 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -1449,6 +1449,15 @@ static inline void mark_lock_accessed(struct lock_list *lock,
lock->class[forward]->dep_gen_id = lockdep_dependency_gen_id;
}

+static inline void mark_lock_unaccessed(struct lock_list *lock)
+{
+ unsigned long nr;
+
+ nr = lock - list_entries;
+ WARN_ON(nr >= ARRAY_SIZE(list_entries)); /* Out-of-bounds, input fail */
+ fw_dep_class(lock)->dep_gen_id--;
+}
+
static inline unsigned long lock_accessed(struct lock_list *lock, int forward)
{
unsigned long nr;
--
1.8.3.1
\
 
 \ /
  Last update: 2019-06-28 11:18    [W:0.108 / U:0.080 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site