From 577c9c60fccc57fce8502f9375c2f623d292c6ad Mon Sep 17 00:00:00 2001 From: David Matlack Date: Fri, 16 Dec 2016 14:30:35 -0800 Subject: jump_labels: API for flushing deferred jump label updates [ Upstream commit b6416e61012429e0277bd15a229222fd17afc1c1 ] Modules that use static_key_deferred need a way to synchronize with any delayed work that is still pending when the module is unloaded. Introduce static_key_deferred_flush() which flushes any pending jump label updates. Signed-off-by: David Matlack Cc: stable@vger.kernel.org Acked-by: Peter Zijlstra (Intel) Signed-off-by: Paolo Bonzini Signed-off-by: Sasha Levin --- kernel/jump_label.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'kernel') diff --git a/kernel/jump_label.c b/kernel/jump_label.c index 9019f15deab2..7d4d0a917d13 100644 --- a/kernel/jump_label.c +++ b/kernel/jump_label.c @@ -116,6 +116,13 @@ void static_key_slow_dec_deferred(struct static_key_deferred *key) } EXPORT_SYMBOL_GPL(static_key_slow_dec_deferred); +void static_key_deferred_flush(struct static_key_deferred *key) +{ + STATIC_KEY_CHECK_USE(); + flush_delayed_work(&key->work); +} +EXPORT_SYMBOL_GPL(static_key_deferred_flush); + void jump_label_rate_limit(struct static_key_deferred *key, unsigned long rl) { -- cgit v1.2.3