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

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Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
This commit is contained in:
Vineet Gupta 2016-03-15 11:36:43 +05:30
parent c2ff5cf273
commit b31ac42697
2 changed files with 1 additions and 6 deletions
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2
arch/arc/Kconfig
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@ -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

5
arch/arc/kernel/setup.c
View File

@ -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");
}
/*