Differential D15565 Diff 44995 mail/thunderbird/files/patch-bug1442583

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				commit 7371a080accd
				Author: Lars T Hansen <lhansen@mozilla.com>
				Date: Mon Mar 5 09:55:28 2018 +0100

				Bug 1442583 - Properly initialize ARM64 icache flushing machinery. r=sstangl

				--HG--
				extra : rebase_source : 73b5921da1fa0a19d6072e35d09bd7b528bb6bfc
				extra : intermediate-source : 19516efbbf6750ba04e11c7099586d5be2fe818f
				extra : source : 4316cc82d6302edf839a4af6fcb815f0ffa9f65c
				---
				js/src/jit/ProcessExecutableMemory.cpp \| 7 +++++++
				1 file changed, 7 insertions(+)

				diff --git js/src/jit/ProcessExecutableMemory.cpp js/src/jit/ProcessExecutableMemory.cpp
				index e763a9d68dc17..8a6d50b6a7845 100644
				--- js/src/jit/ProcessExecutableMemory.cpp
				+++ js/src/jit/ProcessExecutableMemory.cpp
				@@ -20,6 +20,9 @@
				#include "jsutil.h"

				#include "gc/Memory.h"
				+#ifdef JS_CODEGEN_ARM64
				+# include "jit/arm64/vixl/Cpu-vixl.h"
				+#endif
				#include "threading/LockGuard.h"
				#include "threading/Mutex.h"
				#include "util/Windows.h"
				@@ -621,6 +624,10 @@ js::jit::DeallocateExecutableMemory(void* addr, size_t bytes)
				bool
				js::jit::InitProcessExecutableMemory()
				{
				+#ifdef JS_CODEGEN_ARM64
				+ // Initialize instruction cache flushing.
				+ vixl::CPU::SetUp();
				+#endif
				return execMemory.init();
				}