diff options
| author | Andy Lutomirski <[email protected]> | 2015-07-15 10:29:39 -0700 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2015-07-17 12:50:13 +0200 |
| commit | 23a781e987f05029c4a99a5c145be3efa6eda9f3 (patch) | |
| tree | 8f80cdb789b0e91a43ffec89f52a8f1711758b17 | |
| parent | 810bc075f78ff2c221536eb3008eac6a492dba2d (diff) | |
x86/nmi/64: Minor asm simplification
Replace LEA; MOV with an equivalent SUB. This saves one
instruction.
Signed-off-by: Andy Lutomirski <[email protected]>
Reviewed-by: Steven Rostedt <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
| -rw-r--r-- | arch/x86/entry/entry_64.S | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S index d8ab2b201fa1..0fb52526e452 100644 --- a/arch/x86/entry/entry_64.S +++ b/arch/x86/entry/entry_64.S @@ -1420,8 +1420,7 @@ nested_nmi: * Modify the "iret" frame to point to repeat_nmi, forcing another * iteration of NMI handling. */ - leaq -1*8(%rsp), %rdx - movq %rdx, %rsp + subq $8, %rsp leaq -10*8(%rsp), %rdx pushq $__KERNEL_DS pushq %rdx |