diff options
| author | Dominik Brodowski <[email protected]> | 2018-03-06 22:18:09 +0100 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2018-03-07 07:57:31 +0100 |
| commit | 91c5f0de64a226e0d9c558b26ef7c2655ef31cca (patch) | |
| tree | e273a51fa07088bfff75fa9caf4f4c55dd1fc2c9 | |
| parent | af52201d991624d2d5adce2c123805b3d42a8d4d (diff) | |
x86/entry/64/compat: Save one instruction in entry_INT80_compat()
As %rdi is never user except in the following push, there is no
need to restore %rdi to the original value.
Signed-off-by: Dominik Brodowski <[email protected]>
Acked-by: Linus Torvalds <[email protected]>
Acked-by: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Denys Vlasenko <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Josh Poimboeuf <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Cc: [email protected]
Signed-off-by: Ingo Molnar <[email protected]>
| -rw-r--r-- | arch/x86/entry/entry_64_compat.S | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/arch/x86/entry/entry_64_compat.S b/arch/x86/entry/entry_64_compat.S index ff61b7bb750b..08425c42f8b7 100644 --- a/arch/x86/entry/entry_64_compat.S +++ b/arch/x86/entry/entry_64_compat.S @@ -363,9 +363,7 @@ ENTRY(entry_INT80_compat) pushq 2*8(%rdi) /* regs->ip */ pushq 1*8(%rdi) /* regs->orig_ax */ - movq (%rdi), %rdi /* restore %rdi */ - - pushq %rdi /* pt_regs->di */ + pushq (%rdi) /* pt_regs->di */ pushq %rsi /* pt_regs->si */ pushq %rdx /* pt_regs->dx */ pushq %rcx /* pt_regs->cx */ |