[PATCH 4.4 048/146] ARCv2: Check for LL-SC livelock only if LLSC is enabled

[Greg Kroah-Hartman]

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Vineet Gupta <vgu...@synopsys.com>

commit 4d0cb15fccd1db9dac0c964b2ccf10874e69f5b8 upstream.

Signed-off-by: Vineet Gupta <vgu...@synopsys.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 arch/arc/kernel/setup.c |    1 +
 1 file changed, 1 insertion(+)

--- a/arch/arc/kernel/setup.c
+++ b/arch/arc/kernel/setup.c
@@ -334,6 +334,7 @@ static void arc_chk_core_config(void)
                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");
 }