We can cancel deferred static_key_slow_dec() instead of increasing
.enabled.counter.
Timer now won't fire before 'timeout' since the last increase, so this patch
further stabilizes the case of frequent switching.
Signed-off-by: Radim Krčmář <rkrc...@redhat.com>
---
kernel/jump_label.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/kernel/jump_label.c b/kernel/jump_label.c
index bd7ad31..9b57261 100644
--- a/kernel/jump_label.c
+++ b/kernel/jump_label.c
@@ -79,7 +79,8 @@ void static_key_slow_inc_deferred(struct static_key_deferred
*key)
STATIC_KEY_CHECK_USE();
if (atomic_dec_if_positive(&key->enabled_debt) >= 0)
return;
- static_key_slow_inc(&key->key);
+ if (!cancel_delayed_work(&key->work))
+ static_key_slow_inc(&key->key);
}
EXPORT_SYMBOL_GPL(static_key_slow_inc_deferred);
--
1.8.4.2
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
