[Xen-changelog] [xen stable-4.8] x86: fix GET_STACK_END

[patchbot@xxxxxxx]

commit 2cd189eb55af8b04185b473ac2885f76b3d87efe
Author:     Wei Liu <wei.liu2@xxxxxxxxxx>
AuthorDate: Thu Feb 8 12:51:18 2018 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Thu Feb 8 12:51:18 2018 +0100

    x86: fix GET_STACK_END
    
    AIUI the purpose of having the .if directive is to make GET_STACK_END
    work with any general purpose registers. The code as-is would produce
    the wrong result for r8. Fix it.
    
    Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>
    Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    master commit: 8155476765a5bdecea1534b46562cf28e0113a9a
    master date: 2018-01-25 11:34:17 +0000
---
 xen/include/asm-x86/asm_defns.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/include/asm-x86/asm_defns.h b/xen/include/asm-x86/asm_defns.h
index 358deff..edd7f05 100644
--- a/xen/include/asm-x86/asm_defns.h
+++ b/xen/include/asm-x86/asm_defns.h
@@ -120,7 +120,7 @@ void ret_from_intr(void);
 
 #define STACK_CPUINFO_FIELD(field) (1 - CPUINFO_sizeof + CPUINFO_##field)
 #define GET_STACK_END(reg)                        \
-        .if .Lr##reg > 8;                         \
+        .if .Lr##reg >= 8;                        \
         movq $STACK_SIZE-1, %r##reg;              \
         .else;                                    \
         movl $STACK_SIZE-1, %e##reg;              \
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.8

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