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Commit b31ac426 authored by Vineet Gupta's avatar Vineet Gupta
Browse files

ARCv2: LLSC: software backoff is NOT needed starting HS2.1c 



Signed-off-by: default avatarVineet Gupta <vgupta@synopsys.com>
parent c2ff5cf2

arch/arc/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -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

arch/arc/kernel/setup.c

+0 −5
Original line number Diff line number Diff line
@@ -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");

}



/*