x86: return correct error code from child_rip in x86_64 entry.S

Right now register edi is just cleared before calling do_exit.
That is wrong because correct return value will be ignored.
Value from rax should be copied to rdi instead of clearing edi.

AK: changed to 32bit move because it's strictly an int

[ tglx: arch/x86 adaptation ]

Signed-off-by: Andrey Mirkin <major@openvz.org>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index f1cacd4897f74892eea1e8c4399b1891c6b523ad..3a058bb16409329f9ee255c57e81ff1cefb8cf2a 100644 (file)
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -988,7 +988,7 @@ child_rip:
        movq %rsi, %rdi
        call *%rax
        # exit
-       xorl %edi, %edi
+       mov %eax, %edi
        call do_exit
        CFI_ENDPROC
 ENDPROC(child_rip)