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authorYuyang Du <duyuyang@gmail.com>2019-05-06 16:19:33 +0800
committerIngo Molnar <mingo@kernel.org>2019-06-03 11:55:49 +0200
commit4609c4f963f353613812f999bb027aac795bcde8 (patch)
tree56142bd0b7ed2af1fa9e7b92eabdb466999f9eb5 /kernel/locking
parent1ac4ba5ed0114bcc146d5743d97df414af25c524 (diff)
locking/lockdep: Remove redundant argument in check_deadlock
In check_deadlock(), the third argument read comes from the second argument hlock so that it can be removed. No functional change. Signed-off-by: Yuyang Du <duyuyang@gmail.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: bvanassche@acm.org Cc: frederic@kernel.org Cc: ming.lei@redhat.com Cc: will.deacon@arm.com Link: https://lkml.kernel.org/r/20190506081939.74287-18-duyuyang@gmail.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/locking')
-rw-r--r--kernel/locking/lockdep.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index b2ca20aa69aa..be4c1348ddcd 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -2246,7 +2246,7 @@ print_deadlock_bug(struct task_struct *curr, struct held_lock *prev,
* Returns: 0 on deadlock detected, 1 on OK, 2 on recursive read
*/
static int
-check_deadlock(struct task_struct *curr, struct held_lock *next, int read)
+check_deadlock(struct task_struct *curr, struct held_lock *next)
{
struct held_lock *prev;
struct held_lock *nest = NULL;
@@ -2265,7 +2265,7 @@ check_deadlock(struct task_struct *curr, struct held_lock *next, int read)
* Allow read-after-read recursion of the same
* lock class (i.e. read_lock(lock)+read_lock(lock)):
*/
- if ((read == 2) && prev->read)
+ if ((next->read == 2) && prev->read)
return 2;
/*
@@ -2839,7 +2839,7 @@ static int validate_chain(struct task_struct *curr,
* The simple case: does the current hold the same lock
* already?
*/
- int ret = check_deadlock(curr, hlock, hlock->read);
+ int ret = check_deadlock(curr, hlock);
if (!ret)
return 0;