2 files changed, 14 insertions, 7 deletions

diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S
index 3d727a8a23bc..a332bc7225bf 100644
--- a/arch/arm/kernel/entry-armv.S
+++ b/arch/arm/kernel/entry-armv.S
@@ -734,13 +734,6 @@ ENTRY(__switch_to)
 #ifdef CONFIG_MMU
         ldr     r6, [r2, #TI_CPU_DOMAIN]
 #endif
-#if __LINUX_ARM_ARCH__ >= 6
-#ifdef CONFIG_CPU_32v6K
-        clrex
-#else
-        strex   r5, r4, [ip]                    @ Clear exclusive monitor
-#endif
-#endif
 #if defined(CONFIG_HAS_TLS_REG)
         mcr     p15, 0, r3, c13, c0, 3          @ set TLS register
 #elif !defined(CONFIG_TLS_REG_EMUL)
diff --git a/arch/arm/kernel/entry-header.S b/arch/arm/kernel/entry-header.S
index a4eaf4f920c5..e17e3c30d957 100644
--- a/arch/arm/kernel/entry-header.S
+++ b/arch/arm/kernel/entry-header.S
@@ -76,13 +76,25 @@
 #ifndef CONFIG_THUMB2_KERNEL
         .macro  svc_exit, rpsr
         msr     spsr_cxsf, \rpsr
+#if defined(CONFIG_CPU_32v6K)
+        clrex                                   @ clear the exclusive monitor
         ldmia   sp, {r0 - pc}^                  @ load r0 - pc, cpsr
+#elif defined (CONFIG_CPU_V6)
+        ldr     r0, [sp]
+        strex   r1, r2, [sp]                    @ clear the exclusive monitor
+        ldmib   sp, {r1 - pc}^                  @ load r1 - pc, cpsr
+#endif
         .endm
 
         .macro  restore_user_regs, fast = 0, offset = 0
         ldr     r1, [sp, #\offset + S_PSR]      @ get calling cpsr
         ldr     lr, [sp, #\offset + S_PC]!      @ get pc
         msr     spsr_cxsf, r1                   @ save in spsr_svc
+#if defined(CONFIG_CPU_32v6K)
+        clrex                                   @ clear the exclusive monitor
+#elif defined (CONFIG_CPU_V6)
+        strex   r1, r2, [sp]                    @ clear the exclusive monitor
+#endif
         .if     \fast
         ldmdb   sp, {r1 - lr}^                  @ get calling r1 - lr
         .else
@@ -98,6 +110,7 @@
         .endm
 #else   /* CONFIG_THUMB2_KERNEL */
         .macro  svc_exit, rpsr
+        clrex                                   @ clear the exclusive monitor
         ldr     r0, [sp, #S_SP]                 @ top of the stack
         ldr     r1, [sp, #S_PC]                 @ return address
         tst     r0, #4                          @ orig stack 8-byte aligned?
@@ -110,6 +123,7 @@
         .endm
 
         .macro  restore_user_regs, fast = 0, offset = 0
+        clrex                                   @ clear the exclusive monitor
         mov     r2, sp
         load_user_sp_lr r2, r3, \offset + S_SP  @ calling sp, lr
         ldr     r1, [sp, #\offset + S_PSR]      @ get calling cpsr