Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752606AbbHTMO6 (ORCPT ); Thu, 20 Aug 2015 08:14:58 -0400 Received: from mail-yk0-f174.google.com ([209.85.160.174]:35302 "EHLO mail-yk0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751845AbbHTMO4 (ORCPT ); Thu, 20 Aug 2015 08:14:56 -0400 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> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1440072876-8321-1-git-send-email-haokexin@gmail.com> References: <1440072876-8321-1-git-send-email-haokexin@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1056 Lines: 37 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/