From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758095Ab1I2X1f (ORCPT ); Thu, 29 Sep 2011 19:27:35 -0400 Received: from claw.goop.org ([74.207.240.146]:43218 "EHLO claw.goop.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932207Ab1I2X0z (ORCPT ); Thu, 29 Sep 2011 19:26:55 -0400 From: Jeremy Fitzhardinge To: Steven Rostedt Cc: "David S. Miller" , David Daney , Michael Ellerman , Jan Glauber , Jason Baron , the arch/x86 maintainers , Xen Devel , Linux Kernel Mailing List , Jeremy Fitzhardinge Subject: [PATCH RFC 4/8] sparc/jump_label: add arch_jump_label_transform_early() Date: Thu, 29 Sep 2011 16:26:34 -0700 Message-Id: <6b0e55538e91fd7663430a291a39c6ed048b2548.1317338254.git.jeremy.fitzhardinge@citrix.com> X-Mailer: git-send-email 1.7.6.2 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jeremy Fitzhardinge This allows jump-label entries to be modified early, in a pre-SMP environment. Signed-off-by: Jeremy Fitzhardinge Cc: David S. Miller --- arch/sparc/kernel/jump_label.c | 24 +++++++++++++++--------- 1 files changed, 15 insertions(+), 9 deletions(-) diff --git a/arch/sparc/kernel/jump_label.c b/arch/sparc/kernel/jump_label.c index ea2dafc..d3dad25 100644 --- a/arch/sparc/kernel/jump_label.c +++ b/arch/sparc/kernel/jump_label.c @@ -8,8 +8,8 @@ #ifdef HAVE_JUMP_LABEL -void arch_jump_label_transform(struct jump_entry *entry, - enum jump_label_type type) +static void __jump_label_transform(struct jump_entry *entry, + enum jump_label_type type) { u32 val; u32 *insn = (u32 *) (unsigned long) entry->code; @@ -28,20 +28,26 @@ void arch_jump_label_transform(struct jump_entry *entry, val = 0x01000000; } - get_online_cpus(); - mutex_lock(&text_mutex); *insn = val; flushi(insn); +} + +void arch_jump_label_transform(struct jump_entry *entry, + enum jump_label_type type) +{ + get_online_cpus(); + mutex_lock(&text_mutex); + + __jump_label_transform(entry, type); + mutex_unlock(&text_mutex); put_online_cpus(); } -void arch_jump_label_text_poke_early(jump_label_t addr) +void __init arch_jump_label_transform_early(struct jump_entry *entry, + enum jump_label_type type) { - u32 *insn_p = (u32 *) (unsigned long) addr; - - *insn_p = 0x01000000; - flushi(insn_p); + __jump_label_transform(entry, type); } #endif -- 1.7.6.2