sync smart & dfs (#8672)

Signed-off-by: xqyjlj <xqyjlj@126.com>
Signed-off-by: Shell <smokewood@qq.com>
Co-authored-by: xqyjlj <xqyjlj@126.com>

libcpu/aarch64/common/backtrace.c

@@ -85,7 +85,7 @@ rt_err_t rt_hw_backtrace_frame_unwind(rt_thread_t thread, struct rt_hw_backtrace
     if (fp && !((long)fp & 0x7))
     {
 #ifdef RT_USING_SMART
-        if (thread && thread->lwp)
+        if (thread && thread->lwp && rt_scheduler_is_available())
         {
             rt_lwp_t lwp = thread->lwp;
             void *this_lwp = lwp_self();

libcpu/aarch64/common/mmu.c

@@ -602,7 +602,7 @@ static int _map_single_page_2M(unsigned long *lv0_tbl, unsigned long va,
     return 0;
 }
 
-void *rt_hw_mmu_tbl_get()
+void *rt_hw_mmu_tbl_get(void)
 {
     uintptr_t tbl;
     __asm__ volatile("MRS %0, TTBR0_EL1" : "=r"(tbl));