x86: get rid of pt_regs argument in vm86/vm86old

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

arch/x86/include/asm/syscalls.h

@@ -40,8 +40,8 @@ asmlinkage int sys_sigaction(int, const struct old_sigaction __user *,
 unsigned long sys_sigreturn(void);
 
 /* kernel/vm86_32.c */
-int sys_vm86old(struct vm86_struct __user *, struct pt_regs *);
-int sys_vm86(unsigned long, unsigned long, struct pt_regs *);
+int sys_vm86old(struct vm86_struct __user *);
+int sys_vm86(unsigned long, unsigned long);
 
 #else /* CONFIG_X86_32 */
 

arch/x86/kernel/entry_32.S

@@ -699,27 +699,6 @@ END(syscall_badsys)
  */
 	.popsection
 
-/*
- * System calls that need a pt_regs pointer.
- */
-#define PTREGSCALL1(name) \
-ENTRY(ptregs_##name) ; \
-	leal 4(%esp),%edx; \
-	movl (PT_EBX+4)(%esp),%eax; \
-	jmp sys_##name; \
-ENDPROC(ptregs_##name)
-
-#define PTREGSCALL2(name) \
-ENTRY(ptregs_##name) ; \
-	leal 4(%esp),%ecx; \
-	movl (PT_ECX+4)(%esp),%edx; \
-	movl (PT_EBX+4)(%esp),%eax; \
-	jmp sys_##name; \
-ENDPROC(ptregs_##name)
-
-PTREGSCALL2(vm86)
-PTREGSCALL1(vm86old)
-
 .macro FIXUP_ESPFIX_STACK
 /*
  * Switch back for ESPFIX stack to the normal zerobased stack

arch/x86/kernel/vm86_32.c

@@ -202,7 +202,7 @@ static void mark_screen_rdonly(struct mm_struct *mm)
 static int do_vm86_irq_handling(int subfunction, int irqnumber);
 static void do_sys_vm86(struct kernel_vm86_struct *info, struct task_struct *tsk);
 
-int sys_vm86old(struct vm86_struct __user *v86, struct pt_regs *regs)
+int sys_vm86old(struct vm86_struct __user *v86)
 {
 	struct kernel_vm86_struct info; /* declare this _on top_,
 					 * this avoids wasting of stack space.
@@ -222,7 +222,7 @@ int sys_vm86old(struct vm86_struct __user *v86, struct pt_regs *regs)
 	if (tmp)
 		goto out;
 	memset(&info.vm86plus, 0, (int)&info.regs32 - (int)&info.vm86plus);
-	info.regs32 = regs;
+	info.regs32 = current_pt_regs();
 	tsk->thread.vm86_info = v86;
 	do_sys_vm86(&info, tsk);
 	ret = 0;	/* we never return here */
@@ -231,7 +231,7 @@ int sys_vm86old(struct vm86_struct __user *v86, struct pt_regs *regs)
 }
 
 
-int sys_vm86(unsigned long cmd, unsigned long arg, struct pt_regs *regs)
+int sys_vm86(unsigned long cmd, unsigned long arg)
 {
 	struct kernel_vm86_struct info; /* declare this _on top_,
 					 * this avoids wasting of stack space.
@@ -272,7 +272,7 @@ int sys_vm86(unsigned long cmd, unsigned long arg, struct pt_regs *regs)
 	ret = -EFAULT;
 	if (tmp)
 		goto out;
-	info.regs32 = regs;
+	info.regs32 = current_pt_regs();
 	info.vm86plus.is_vm86pus = 1;
 	tsk->thread.vm86_info = (struct vm86_struct __user *)v86;
 	do_sys_vm86(&info, tsk);

arch/x86/syscalls/syscall_32.tbl

@@ -119,7 +119,7 @@
 110	i386	iopl			sys_iopl
 111	i386	vhangup			sys_vhangup
 112	i386	idle
-113	i386	vm86old			ptregs_vm86old			sys32_vm86_warning
+113	i386	vm86old			sys_vm86old			sys32_vm86_warning
 114	i386	wait4			sys_wait4			compat_sys_wait4
 115	i386	swapoff			sys_swapoff
 116	i386	sysinfo			sys_sysinfo			compat_sys_sysinfo
@@ -172,7 +172,7 @@
 163	i386	mremap			sys_mremap
 164	i386	setresuid		sys_setresuid16
 165	i386	getresuid		sys_getresuid16
-166	i386	vm86			ptregs_vm86			sys32_vm86_warning
+166	i386	vm86			sys_vm86			sys32_vm86_warning
 167	i386	query_module
 168	i386	poll			sys_poll
 169	i386	nfsservctl

arch/x86/um/sys_call_table_32.c

@@ -24,9 +24,6 @@
 
 #define old_mmap sys_old_mmap
 
-#define ptregs_vm86old sys_vm86old
-#define ptregs_vm86 sys_vm86
-
 #define __SYSCALL_I386(nr, sym, compat) extern asmlinkage void sym(void) ;
 #include <asm/syscalls_32.h>