1 files changed, 15 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S
index 56212bc0ab08..4f80cf1ce77b 100644
--- a/arch/powerpc/kernel/entry_32.S
+++ b/arch/powerpc/kernel/entry_32.S
@@ -215,7 +215,22 @@ reenable_mmu:				/* re-enable mmu so we can */
         stw     r9,8(r1)
         stw     r11,12(r1)
         stw     r3,ORIG_GPR3(r1)
+        /*
+         * The trace_hardirqs_off will use CALLER_ADDR0 and CALLER_ADDR1.
+         * If from user mode there is only one stack frame on the stack, and
+         * accessing CALLER_ADDR1 will cause oops. So we need create a dummy
+         * stack frame to make trace_hardirqs_off happy.
+         */
+        andi.   r12,r12,MSR_PR
+        beq     11f
+        stwu    r1,-16(r1)
+        bl      trace_hardirqs_off
+        addi    r1,r1,16
+        b       12f
+
+11:
         bl      trace_hardirqs_off
+12:
         lwz     r0,GPR0(r1)
         lwz     r3,ORIG_GPR3(r1)
         lwz     r4,GPR4(r1)