x86: remove last user of get_segment_eip

is_prefetch was the last user of get_segment_eip and only on
X86_32.  This function returned the faulting instruction's
address and set the upper segment limit.

Instead, use the convert_ip_to_linear helper and rely on
probe_kernel_address to do the segment checks which was
already done everywhere the segment limit was being checked
on X86_32.

Remove get_segment_eip as well.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 4 insertions, 2 deletions

diff --git a/include/asm-x86/ptrace.h b/include/asm-x86/ptrace.h
index 35c103714906..ee4b595e1ccc 100644
--- a/include/asm-x86/ptrace.h
+++ b/include/asm-x86/ptrace.h
@@ -70,6 +70,10 @@ struct pt_regs {
 #include <asm/segment.h>
 
 struct task_struct;
+
+extern unsigned long
+convert_ip_to_linear(struct task_struct *child, struct pt_regs *regs);
+
 extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, int error_code);
 
 /*
@@ -184,8 +188,6 @@ convert_ip_to_linear(struct task_struct *child, struct pt_regs *regs);
 
 #ifdef __KERNEL__
 
-unsigned long get_segment_eip(struct pt_regs *regs, unsigned long *eip_limit);
-
 /*
  * These are defined as per linux/ptrace.h, which see.
  */