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[PATCH 1/3] linux-user/arm: Implement __kernel_memory_barrier
From: |
Richard Henderson |
Subject: |
[PATCH 1/3] linux-user/arm: Implement __kernel_memory_barrier |
Date: |
Sun, 13 Mar 2022 21:43:03 -0700 |
This fallback syscall was stubbed out.
It would only matter for emulating pre-armv6.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
linux-user/arm/cpu_loop.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/linux-user/arm/cpu_loop.c b/linux-user/arm/cpu_loop.c
index 032e1ffddf..a0e43b261c 100644
--- a/linux-user/arm/cpu_loop.c
+++ b/linux-user/arm/cpu_loop.c
@@ -158,7 +158,7 @@ do_kernel_trap(CPUARMState *env)
switch (env->regs[15]) {
case 0xffff0fa0: /* __kernel_memory_barrier */
- /* ??? No-op. Will need to do better for SMP. */
+ smp_mb();
break;
case 0xffff0fc0: /* __kernel_cmpxchg */
/* XXX: This only works between threads, not between processes.
--
2.25.1