From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:46470 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750900AbdAQK1w (ORCPT ); Tue, 17 Jan 2017 05:27:52 -0500 Subject: Patch "jump_labels: API for flushing deferred jump label updates" has been added to the 4.9-stable tree To: dmatlack@google.com, gregkh@linuxfoundation.org, pbonzini@redhat.com, peterz@infradead.org Cc: , From: Date: Tue, 17 Jan 2017 11:28:05 +0100 Message-ID: <148464888515369@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled jump_labels: API for flushing deferred jump label updates to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: jump_labels-api-for-flushing-deferred-jump-label-updates.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From b6416e61012429e0277bd15a229222fd17afc1c1 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 From: David Matlack commit b6416e61012429e0277bd15a229222fd17afc1c1 upstream. 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 Acked-by: Peter Zijlstra (Intel) Signed-off-by: Paolo Bonzini Signed-off-by: Greg Kroah-Hartman --- include/linux/jump_label_ratelimit.h | 5 +++++ kernel/jump_label.c | 7 +++++++ 2 files changed, 12 insertions(+) --- a/include/linux/jump_label_ratelimit.h +++ b/include/linux/jump_label_ratelimit.h @@ -14,6 +14,7 @@ struct static_key_deferred { #ifdef HAVE_JUMP_LABEL extern void static_key_slow_dec_deferred(struct static_key_deferred *key); +extern void static_key_deferred_flush(struct static_key_deferred *key); extern void jump_label_rate_limit(struct static_key_deferred *key, unsigned long rl); @@ -26,6 +27,10 @@ static inline void static_key_slow_dec_d STATIC_KEY_CHECK_USE(); static_key_slow_dec(&key->key); } +static inline void static_key_deferred_flush(struct static_key_deferred *key) +{ + STATIC_KEY_CHECK_USE(); +} static inline void jump_label_rate_limit(struct static_key_deferred *key, unsigned long rl) --- a/kernel/jump_label.c +++ b/kernel/jump_label.c @@ -182,6 +182,13 @@ void static_key_slow_dec_deferred(struct } 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) { Patches currently in stable-queue which might be from dmatlack@google.com are queue-4.9/kvm-x86-flush-pending-lapic-jump-label-updates-on-module-unload.patch queue-4.9/jump_labels-api-for-flushing-deferred-jump-label-updates.patch