From b31ac42697bef4a3aa5d0aa42375a55657f57174 Mon Sep 17 00:00:00 2001 From: Vineet Gupta Date: Tue, 15 Mar 2016 11:36:43 +0530 Subject: [PATCH] ARCv2: LLSC: software backoff is NOT needed starting HS2.1c Signed-off-by: Vineet Gupta --- arch/arc/Kconfig | 2 +- arch/arc/kernel/setup.c | 5 ----- 2 files changed, 1 insertion(+), 6 deletions(-) diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig index 7981ea86c5bd..8ce092801221 100644 --- 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 diff --git a/arch/arc/kernel/setup.c b/arch/arc/kernel/setup.c index cdc821df1809..fa1fa9aa0e0b 100644 --- a/arch/arc/kernel/setup.c +++ b/arch/arc/kernel/setup.c @@ -357,11 +357,6 @@ 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"); } /* -- 2.20.1