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Subject[PATCH V6 48/49] x86/entry: Remove save_ret from PUSH_AND_CLEAR_REGS
Date
From: Lai Jiangshan <laijs@linux.alibaba.com>

PUSH_AND_CLEAR_REGS is never used with save_ret anymore.

Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>
---
arch/x86/entry/calling.h | 16 +++-------------
1 file changed, 3 insertions(+), 13 deletions(-)

diff --git a/arch/x86/entry/calling.h b/arch/x86/entry/calling.h
index d42012fc694d..6f9de1c6da73 100644
--- a/arch/x86/entry/calling.h
+++ b/arch/x86/entry/calling.h
@@ -63,15 +63,9 @@ For 32-bit we have the following conventions - kernel is built with
* for assembly code:
*/

-.macro PUSH_REGS rdx=%rdx rax=%rax save_ret=0
- .if \save_ret
- pushq %rsi /* pt_regs->si */
- movq 8(%rsp), %rsi /* temporarily store the return address in %rsi */
- movq %rdi, 8(%rsp) /* pt_regs->di (overwriting original return address) */
- .else
+.macro PUSH_REGS rdx=%rdx rax=%rax
pushq %rdi /* pt_regs->di */
pushq %rsi /* pt_regs->si */
- .endif
pushq \rdx /* pt_regs->dx */
pushq %rcx /* pt_regs->cx */
pushq \rax /* pt_regs->ax */
@@ -86,10 +80,6 @@ For 32-bit we have the following conventions - kernel is built with
pushq %r14 /* pt_regs->r14 */
pushq %r15 /* pt_regs->r15 */
UNWIND_HINT_REGS
-
- .if \save_ret
- pushq %rsi /* return address on top of stack */
- .endif
.endm

.macro CLEAR_REGS
@@ -114,8 +104,8 @@ For 32-bit we have the following conventions - kernel is built with

.endm

-.macro PUSH_AND_CLEAR_REGS rdx=%rdx rax=%rax save_ret=0
- PUSH_REGS rdx=\rdx, rax=\rax, save_ret=\save_ret
+.macro PUSH_AND_CLEAR_REGS rdx=%rdx rax=%rax
+ PUSH_REGS rdx=\rdx, rax=\rax
CLEAR_REGS
.endm

--
2.19.1.6.gb485710b
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