From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:42436 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751336AbcGMWrd (ORCPT ); Wed, 13 Jul 2016 18:47:33 -0400 Subject: Patch "ARCv2: LLSC: software backoff is NOT needed starting HS2.1c" has been added to the 4.4-stable tree To: vgupta@synopsys.com, gregkh@linuxfoundation.org Cc: , From: Date: Thu, 14 Jul 2016 07:47:35 +0900 Message-ID: <1468450055203108@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 ARCv2: LLSC: software backoff is NOT needed starting HS2.1c to the 4.4-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: arcv2-llsc-software-backoff-is-not-needed-starting-hs2.1c.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From b31ac42697bef4a3aa5d0aa42375a55657f57174 Mon Sep 17 00:00:00 2001 From: Vineet Gupta Date: Tue, 15 Mar 2016 11:36:43 +0530 Subject: ARCv2: LLSC: software backoff is NOT needed starting HS2.1c From: Vineet Gupta commit b31ac42697bef4a3aa5d0aa42375a55657f57174 upstream. Signed-off-by: Vineet Gupta Signed-off-by: Greg Kroah-Hartman --- arch/arc/Kconfig | 2 +- arch/arc/kernel/setup.c | 5 ----- 2 files changed, 1 insertion(+), 6 deletions(-) --- a/arch/arc/Kconfig +++ b/arch/arc/Kconfig @@ -387,7 +387,7 @@ config ARC_HAS_LLSC config ARC_STAR_9000923308 bool "Workaround for llock/scond livelock" - default y + default n depends on ISA_ARCV2 && SMP && ARC_HAS_LLSC config ARC_HAS_SWAPE --- a/arch/arc/kernel/setup.c +++ b/arch/arc/kernel/setup.c @@ -332,11 +332,6 @@ static void arc_chk_core_config(void) pr_warn("CONFIG_ARC_FPU_SAVE_RESTORE needed for working apps\n"); else if (!cpu->extn.fpu_dp && fpu_enabled) panic("FPU non-existent, disable CONFIG_ARC_FPU_SAVE_RESTORE\n"); - - if (is_isa_arcv2() && IS_ENABLED(CONFIG_SMP) && cpu->isa.atomic && - IS_ENABLED(CONFIG_ARC_HAS_LLSC) && - !IS_ENABLED(CONFIG_ARC_STAR_9000923308)) - panic("llock/scond livelock workaround missing\n"); } /* Patches currently in stable-queue which might be from vgupta@synopsys.com are queue-4.4/arcv2-check-for-ll-sc-livelock-only-if-llsc-is-enabled.patch queue-4.4/arcv2-llsc-software-backoff-is-not-needed-starting-hs2.1c.patch