From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-yk0-x22d.google.com (mail-yk0-x22d.google.com [IPv6:2607:f8b0:4002:c07::22d]) (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 E974E1A0226 for ; Thu, 20 Aug 2015 22:14:57 +1000 (AEST) Received: by ykll84 with SMTP id l84so35020910ykl.0 for ; Thu, 20 Aug 2015 05:14:55 -0700 (PDT) From: Kevin Hao To: Michael Ellerman Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, Peter Zijlstra , Ingo Molnar , Benjamin Herrenschmidt Subject: [PATCH 1/8] jump_label: no need to acquire the jump_label_mutex in jump_lable_init() Date: Thu, 20 Aug 2015 20:14:29 +0800 Message-Id: <1440072876-8321-2-git-send-email-haokexin@gmail.com> In-Reply-To: <1440072876-8321-1-git-send-email-haokexin@gmail.com> References: <1440072876-8321-1-git-send-email-haokexin@gmail.com> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , The jump_label_init() run in a very early stage, even before the sched_init(). So there is no chance for concurrent access of the jump label table. Signed-off-by: Kevin Hao --- kernel/jump_label.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/kernel/jump_label.c b/kernel/jump_label.c index f7dd15d537f9..df1a7fbe7cd5 100644 --- a/kernel/jump_label.c +++ b/kernel/jump_label.c @@ -205,7 +205,6 @@ void __init jump_label_init(void) struct static_key *key = NULL; struct jump_entry *iter; - jump_label_lock(); jump_label_sort_entries(iter_start, iter_stop); for (iter = iter_start; iter < iter_stop; iter++) { @@ -229,7 +228,6 @@ void __init jump_label_init(void) #endif } static_key_initialized = true; - jump_label_unlock(); } #ifdef CONFIG_MODULES -- 2.1.0