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

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Message-Id: <20160725203523.360826166@linuxfoundation.org>
Date:	Mon, 25 Jul 2016 13:55:03 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Vineet Gupta <vgupta@...opsys.com>
Subject: [PATCH 4.4 048/146] ARCv2: Check for LL-SC livelock only if LLSC is enabled

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

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

From: Vineet Gupta <vgupta@...opsys.com>

commit 4d0cb15fccd1db9dac0c964b2ccf10874e69f5b8 upstream.

Signed-off-by: Vineet Gupta <vgupta@...opsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.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");
 }