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| author | Vineet Gupta <vgupta@synopsys.com> | 2016-03-15 09:06:43 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-07-27 19:47:31 +0300 |
| commit | fb4d339f0ffdbe8b6b3aa57940c4a40f538a1887 (patch) | |
| tree | a7e8f13456e6512e3aeec228ec821e0bcf0f9fa1 /arch/arc | |
| parent | f06a5a019b1161da6f47bde5e7ce63e70193caec (diff) | |
| download | linux-fb4d339f0ffdbe8b6b3aa57940c4a40f538a1887.tar.xz | |
ARCv2: LLSC: software backoff is NOT needed starting HS2.1c
commit b31ac42697bef4a3aa5d0aa42375a55657f57174 upstream.
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/arc')
| -rw-r--r-- | arch/arc/Kconfig | 2 | ||||
| -rw-r--r-- | arch/arc/kernel/setup.c | 5 |
2 files changed, 1 insertions, 6 deletions
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig index 6312f607932f..2d785f5a3041 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 87ddeeb03f60..05131805aa33 100644 --- 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"); } /* |