[PATCH 18/19] target/arm: Fix tsan warning in cpu.c

[Robert Foley]

For example:
WARNING: ThreadSanitizer: data race (pid=11134)
  Atomic write of size 4 at 0x7bbc0000e0ac by main thread (mutexes: write M875):
    #0 __tsan_atomic32_store <null> (qemu-system-aarch64+0x394d84)
    #1 cpu_reset_interrupt hw/core/cpu.c:107:5 (qemu-system-aarch64+0x842f90)
    #2 arm_cpu_set_irq target/arm/cpu.c (qemu-system-aarch64+0x615a55)

  Previous read of size 4 at 0x7bbc0000e0ac by thread T7:
    #0 arm_cpu_has_work target/arm/cpu.c:78:16 (qemu-system-aarch64+0x6178ba)
    #1 cpu_has_work include/hw/core/cpu.h:700:12 (qemu-system-aarch64+0x68be2e)

Cc: Peter Maydell <address@hidden>
Cc: Richard Henderson <address@hidden>
Signed-off-by: Robert Foley <address@hidden>
---
 target/arm/cpu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index 32bec156f2..cdb90582ee 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -75,7 +75,7 @@ static bool arm_cpu_has_work(CPUState *cs)
     ARMCPU *cpu = ARM_CPU(cs);
 
     return (cpu->power_state != PSCI_OFF)
-        && cs->interrupt_request &
+        && atomic_read(&cs->interrupt_request) &
         (CPU_INTERRUPT_FIQ | CPU_INTERRUPT_HARD
          | CPU_INTERRUPT_VFIQ | CPU_INTERRUPT_VIRQ
          | CPU_INTERRUPT_EXITTB);
-- 
2.17.1