linux-kernel - [PATCH 4.4 046/192] [PATCH 047/135] cxl: fix build for GCC 4.6.x

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Date:   Mon, 12 Sep 2016 18:59:15 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Michal Marek <mmarek@...e.com>,
        Arnd Bergmann <arnd@...db.de>,
        Brian Norris <computersforpeace@...il.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Sasha Levin <alexander.levin@...izon.com>
Subject: [PATCH 4.4 046/192] [PATCH 047/135] cxl: fix build for GCC 4.6.x

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

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

[ Upstream commit aa09545589ceeff884421d8eb38d04963190afbe ]

GCC 4.6.3 does not support -Wno-unused-const-variable. Instead, use the
kbuild infrastructure that checks if this options exists.

Fixes: 2cd55c68c0a4 ("cxl: Fix build failure due to -Wunused-variable behaviour change")
Suggested-by: Michal Marek <mmarek@...e.com>
Suggested-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Brian Norris <computersforpeace@...il.com>
Signed-off-by: Michael Ellerman <mpe@...erman.id.au>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/misc/cxl/Makefile |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/misc/cxl/Makefile
+++ b/drivers/misc/cxl/Makefile
@@ -1,4 +1,4 @@
-ccflags-y := -Werror -Wno-unused-const-variable
+ccflags-y := -Werror $(call cc-disable-warning, unused-const-variable)
 
 cxl-y				+= main.o file.o irq.o fault.o native.o
 cxl-y				+= context.o sysfs.o debugfs.o pci.o trace.o