Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

[firefly-linux-kernel-4.4.55.git] / arch / x86 / kernel / entry_64.S

diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index 722df1b1152d57721568ef583e4f2c002922979b..4deb8fc849dd1554a2ed6b3dc9c1f28ed5c6a797 100644 (file)
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -1499,12 +1499,17 @@ error_kernelspace:
        leaq irq_return(%rip),%rcx
        cmpq %rcx,RIP+8(%rsp)
        je error_swapgs
-       movl %ecx,%ecx  /* zero extend */
-       cmpq %rcx,RIP+8(%rsp)
-       je error_swapgs
+       movl %ecx,%eax  /* zero extend */
+       cmpq %rax,RIP+8(%rsp)
+       je bstep_iret
        cmpq $gs_change,RIP+8(%rsp)
        je error_swapgs
        jmp error_sti
+
+bstep_iret:
+       /* Fix truncated RIP */
+       movq %rcx,RIP+8(%rsp)
+       jmp error_swapgs
 END(error_entry)