[PATCH] softmmu: fix watchpoint processing in icount mode

[Pavel Dovgalyuk]

Watchpoint processing code restores vCPU state twice:
in tb_check_watchpoint and in cpu_loop_exit_restore/cpu_restore_state.
Normally it does not affect anything, but in icount mode instruction
counter is incremented twice and becomes incorrect.
This patch eliminates unneeded CPU state restore.

Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgalyuk@ispras.ru>
---
 softmmu/physmem.c |    5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/softmmu/physmem.c b/softmmu/physmem.c
index 23e77cb771..4025dfab11 100644
--- a/softmmu/physmem.c
+++ b/softmmu/physmem.c
@@ -941,14 +941,11 @@ void cpu_check_watchpoint(CPUState *cpu, vaddr addr, 
vaddr len,
                 if (wp->flags & BP_STOP_BEFORE_ACCESS) {
                     cpu->exception_index = EXCP_DEBUG;
                     mmap_unlock();
-                    cpu_loop_exit_restore(cpu, ra);
+                    cpu_loop_exit(cpu);
                 } else {
                     /* Force execution of one insn next time.  */
                     cpu->cflags_next_tb = 1 | curr_cflags(cpu);
                     mmap_unlock();
-                    if (ra) {
-                        cpu_restore_state(cpu, ra, true);
-                    }
                     cpu_loop_exit_noexc(cpu);
                 }
             }