Messages in this thread Patch in this message | | | From | Zenghui Yu <> | Subject | [PATCH] locking/qspinlock: Fix typo of lock word transition in the uncontended case | Date | Thu, 15 Jul 2021 11:08:47 +0800 |
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If the queue head is the only one in the queue and nobody is concurrently setting PENDING bit, the uncontended transition should be n,0,0 -> 0,0,1.
Fix the typo.
Signed-off-by: Zenghui Yu <yuzenghui@huawei.com> --- kernel/locking/qspinlock.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/locking/qspinlock.c b/kernel/locking/qspinlock.c index cbff6ba53d56..591835415698 100644 --- a/kernel/locking/qspinlock.c +++ b/kernel/locking/qspinlock.c @@ -355,7 +355,7 @@ void queued_spin_lock_slowpath(struct qspinlock *lock, u32 val) * If we observe contention, there is a concurrent locker. * * Undo and queue; our setting of PENDING might have made the - * n,0,0 -> 0,0,0 transition fail and it will now be waiting + * n,0,0 -> 0,0,1 transition fail and it will now be waiting * on @next to become !NULL. */ if (unlikely(val & ~_Q_LOCKED_MASK)) { -- 2.19.1
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