exec: drop cpu_can_do_io, just read cpu->can_do_io

After commit 626cf8f (icount: set can_do_io outside TB execution,
2014-12-08), can_do_io is set to 1 if not executing code.  It is
no longer necessary to make this assumption in cpu_can_do_io.

It is also possible to remove the use_icount test, simply by
never setting cpu->can_do_io to 0 unless use_icount is true.

With these changes cpu_can_do_io boils down to a read of
cpu->can_do_io.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/qom/cpu.c b/qom/cpu.c
index eb9cfeca18..62f4b5de44 100644
--- a/qom/cpu.c
+++ b/qom/cpu.c
@@ -247,7 +247,7 @@ static void cpu_common_reset(CPUState *cpu)
     cpu->mem_io_vaddr = 0;
     cpu->icount_extra = 0;
     cpu->icount_decr.u32 = 0;
-    cpu->can_do_io = 0;
+    cpu->can_do_io = 1;
     cpu->exception_index = -1;
     memset(cpu->tb_jmp_cache, 0, TB_JMP_CACHE_SIZE * sizeof(void *));
 }