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tcg: Note requirement on atomic direct jump patching

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Backports commit 10b4f4855537dd421e193a7d0416513116370558 from qemu
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Sergey Fedorov 2018-02-23 20:43:01 -05:00 committed by Lioncash
parent 87c3382dc8
commit c5b234ed1f
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qemu/include/exec/exec-all.h
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@ -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