Patch "ARCv2: Check for LL-SC livelock only if LLSC is enabled" has been added to the 4.4-stable tree

Patch "ARCv2: Check for LL-SC livelock only if LLSC is enabled" has been added to the 4.4-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    ARCv2: Check for LL-SC livelock only if LLSC is enabled

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     arcv2-check-for-ll-sc-livelock-only-if-llsc-is-enabled.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 4d0cb15fccd1db9dac0c964b2ccf10874e69f5b8 Mon Sep 17 00:00:00 2001
From: Vineet Gupta <vgupta@synopsys.com>
Date: Fri, 29 Jan 2016 16:47:44 +0530
Subject: ARCv2: Check for LL-SC livelock only if LLSC is enabled

From: Vineet Gupta <vgupta@synopsys.com>

commit 4d0cb15fccd1db9dac0c964b2ccf10874e69f5b8 upstream.

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


Patches currently in stable-queue which might be from vgupta@synopsys.com are

queue-4.4/arcv2-check-for-ll-sc-livelock-only-if-llsc-is-enabled.patch
queue-4.4/arcv2-llsc-software-backoff-is-not-needed-starting-hs2.1c.patch