arm64: no gmb() implementation yet

CVE-2017-5753 CVE-2017-5715 Signed-off-by: Andy Whitcroft <apw@canonical.com>

arm64: no gmb() implementation yet
CVE-2017-5753 CVE-2017-5715 Signed-off-by: Andy Whitcroft <apw@canonical.com>
4e1b8db1 · Andy Whitcroft · Marcelo Henrique Cerri · 1a7bb619 · 4e1b8db1
Commit 4e1b8db1 authored Jan 12, 2018 by Andy Whitcroft Committed by Marcelo Henrique Cerri Jan 12, 2018
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arch/arm64/include/asm/barrier.h arch/arm64/include/asm/barrier.h +1 -0

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--- a/arch/arm64/include/asm/barrier.h
+++ b/arch/arm64/include/asm/barrier.h
@@ -31,6 +31,7 @@
 #define mb()		dsb(sy)
 #define rmb()		dsb(ld)
 #define wmb()		dsb(st)
+#define gmb()   	do { } while (0)
 #define dma_rmb()	dmb(oshld)
 #define dma_wmb()	dmb(oshst)