diff --git a/arch/risc-v/src/c906/c906_start.c b/arch/risc-v/src/c906/c906_start.c
index 1b58cf42479..0248374b788 100644
--- a/arch/risc-v/src/c906/c906_start.c
+++ b/arch/risc-v/src/c906/c906_start.c
@@ -59,7 +59,6 @@
  */
 
 uintptr_t g_idle_topstack = C906_IDLESTACK_TOP;
-volatile bool g_serial_ok = false;
 
 /****************************************************************************
  * Public Functions
@@ -115,8 +114,6 @@ void __c906_start(uint32_t mhartid)
 
   showprogress('B');
 
-  g_serial_ok = true;
-
   /* Do board initialization */
 
   c906_boardinitialize();
diff --git a/arch/risc-v/src/common/riscv_cpustart.c b/arch/risc-v/src/common/riscv_cpustart.c
index e6984ada7e3..abc2086f79c 100644
--- a/arch/risc-v/src/common/riscv_cpustart.c
+++ b/arch/risc-v/src/common/riscv_cpustart.c
@@ -41,16 +41,6 @@
 #include "riscv_internal.h"
 #include "chip.h"
 
-/****************************************************************************
- * Pre-processor Definitions
- ****************************************************************************/
-
-/****************************************************************************
- * Public Data
- ****************************************************************************/
-
-extern volatile bool g_serial_ok;
-
 /****************************************************************************
  * Public Functions
  ****************************************************************************/
@@ -76,12 +66,6 @@ void riscv_cpu_boot(int cpu)
       return;
     }
 
-  /* Wait for g_serial_ok set by cpu0 when booting */
-
-  while (!g_serial_ok)
-    {
-    }
-
   /* Clear machine software interrupt for CPU(cpu) */
 
   putreg32(0, (uintptr_t)RISCV_CLINT_MSIP + (4 * cpu));
diff --git a/arch/risc-v/src/k210/k210_start.c b/arch/risc-v/src/k210/k210_start.c
index f9159523d20..51993e8fa86 100644
--- a/arch/risc-v/src/k210/k210_start.c
+++ b/arch/risc-v/src/k210/k210_start.c
@@ -53,7 +53,6 @@
  */
 
 uintptr_t g_idle_topstack = K210_IDLESTACK0_TOP;
-volatile bool g_serial_ok = false;
 
 /****************************************************************************
  * Public Functions
@@ -109,8 +108,6 @@ void __k210_start(uint32_t mhartid)
 
   showprogress('B');
 
-  g_serial_ok = true;
-
   /* Do board initialization */
 
   k210_boardinitialize();
diff --git a/arch/risc-v/src/mpfs/mpfs_start.c b/arch/risc-v/src/mpfs/mpfs_start.c
index bf764d835ab..398659da74f 100755
--- a/arch/risc-v/src/mpfs/mpfs_start.c
+++ b/arch/risc-v/src/mpfs/mpfs_start.c
@@ -61,7 +61,6 @@
  */
 
 uintptr_t g_idle_topstack = MPFS_IDLESTACK_TOP;
-volatile bool g_serial_ok = false;
 
 /* Default boot address for every hart */
 
@@ -159,8 +158,6 @@ void __mpfs_start(uint32_t mhartid)
 
   showprogress('B');
 
-  g_serial_ok = true;
-
   /* Do board initialization */
 
   mpfs_boardinitialize();