[PATCH for review] [87/145] x86_64: remove lock prefix from is_at_popf() tests

Andi Kleen
2006-08-10T20:04:14Z

r

From: Chuck Ebbert <76306.1226@compuserve.com>
The lock prefix will cause an exception when used with the
popf instruction, so no need to continue searching after it's
found.

Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com>
Signed-off-by: Andi Kleen <ak@suse.de>

---
arch/x86_64/kernel/ptrace.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)

Index: linux/arch/x86_64/kernel/ptrace.c
===================================================================
--- linux.orig/arch/x86_64/kernel/ptrace.c
+++ linux/arch/x86_64/kernel/ptrace.c
@@ -138,7 +138,7 @@ static int is_at_popf(struct task_struct
case 0x26: case 0x2e:
case 0x36: case 0x3e:
case 0x64: case 0x65:
- case 0xf0: case 0xf2: case 0xf3:
+ case 0xf2: case 0xf3:
continue;

case 0x40 ... 0x4f:
@@ -148,7 +148,7 @@ static int is_at_popf(struct task_struct
/* 64-bit mode: REX prefix */
continue;

- /* CHECKME: f0, f2, f3 */
+ /* CHECKME: f2, f3 */

/*
* pushf: NOTE! We should probably not let