From 10b4f4855537dd421e193a7d0416513116370558 Mon Sep 17 00:00:00 2001
From: Sergey Fedorov <serge.fdrv@gmail.com>
Date: Fri, 22 Apr 2016 19:08:53 +0300
Subject: [PATCH] tcg: Note requirement on atomic direct jump patching
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Signed-off-by: Sergey Fedorov <serge.fdrv@gmail.com>
Signed-off-by: Sergey Fedorov <sergey.fedorov@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <1461341333-19646-12-git-send-email-sergey.fedorov@linaro.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
---
 include/exec/exec-all.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/exec/exec-all.h b/include/exec/exec-all.h
index 30cdd69..6c113a3 100644
--- a/include/exec/exec-all.h
+++ b/include/exec/exec-all.h
@@ -230,6 +230,7 @@ static inline void tlb_flush_by_mmuidx(CPUState *cpu, ...)
     || defined(__sparc__) || defined(__aarch64__) \
     || defined(__s390x__) || defined(__mips__) \
     || defined(CONFIG_TCG_INTERPRETER)
+/* NOTE: Direct jump patching must be atomic to be thread-safe. */
 #define USE_DIRECT_JUMP
 #endif
 
-- 
2.7.4