From patchwork Mon Aug 24 11:20:23 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Hao X-Patchwork-Id: 509994 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [103.22.144.68]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id C9D761402A0 for ; Mon, 24 Aug 2015 21:23:55 +1000 (AEST) Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b=xn+MjQi5; dkim-atps=neutral Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 9EB2F1A1DC5 for ; Mon, 24 Aug 2015 21:23:55 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b=xn+MjQi5; dkim-atps=neutral X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Received: from mail-yk0-x22b.google.com (mail-yk0-x22b.google.com [IPv6:2607:f8b0:4002:c07::22b]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 9DE261A1D92 for ; Mon, 24 Aug 2015 21:20:49 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b=xn+MjQi5; dkim-atps=neutral Received: by ykfw73 with SMTP id w73so130872144ykf.3 for ; Mon, 24 Aug 2015 04:20:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=CYCCazn/gT3yIvXaX+eOpwJ9Y4IzIATmigH104eQvk8=; b=xn+MjQi5C73Tff1/77yXhOVJvJON44Tb+deQbqijuLISDrSLQg4fnvFl/5bHYjYcw7 hVX0MuitRWwZHuWy8MsGm9n3TSnMHZZG0a4lXeLui65lTpbtfUHY/BC574jq0kbMX5Qi wNHKUpfSjF0UDnpW2ZJpztsRiRwTytLipnL9OcS9e89BxMZu+WjPf3fJoDefnHQRv9Iw PpEborgc+/rlBXDes88czhXr4wfcZiBOEmjYR/igxFjESBRlMsSKAFwkyt7El51iq2rF tpywRBiLUqtEWFrRBPF14b71Spvfo9tOQhZHXyW1Tin5qedj0jmj1TGweAmHkndS6tqd bM6w== X-Received: by 10.170.113.195 with SMTP id f186mr18669528ykb.55.1440415247545; Mon, 24 Aug 2015 04:20:47 -0700 (PDT) Received: from pek-khao-d1.corp.ad.wrs.com (unknown-178-22.windriver.com. [147.11.178.22]) by smtp.gmail.com with ESMTPSA id i82sm9014125ywg.1.2015.08.24.04.20.43 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 24 Aug 2015 04:20:46 -0700 (PDT) From: Kevin Hao To: Michael Ellerman Subject: [PATCH v2 1/6] jump_label: make it possible for the archs to invoke jump_label_init() much earlier Date: Mon, 24 Aug 2015 19:20:23 +0800 Message-Id: <1440415228-8006-2-git-send-email-haokexin@gmail.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1440415228-8006-1-git-send-email-haokexin@gmail.com> References: <1440415228-8006-1-git-send-email-haokexin@gmail.com> X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Zijlstra , linuxppc-dev@lists.ozlabs.org, Ingo Molnar , linux-kernel@vger.kernel.org MIME-Version: 1.0 Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" For some archs (such as powerpc) would want to invoke jump_label_init() in a much earlier stage. So check static_key_initialized in order to make sure this function run only once. Signed-off-by: Kevin Hao --- v2: No change. kernel/jump_label.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/kernel/jump_label.c b/kernel/jump_label.c index f7dd15d537f9..cfc7d7b65432 100644 --- a/kernel/jump_label.c +++ b/kernel/jump_label.c @@ -205,6 +205,9 @@ void __init jump_label_init(void) struct static_key *key = NULL; struct jump_entry *iter; + if (static_key_initialized) + return; + jump_label_lock(); jump_label_sort_entries(iter_start, iter_stop);