x86: Merge sys_clone

Change 32-bit sys_clone to new PTREGSCALL stub, and merge with 64-bit.

Signed-off-by: Brian Gerst <brgerst@gmail.com>
LKML-Reference: <1260403316-5679-7-git-send-email-brgerst@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

arch/x86/kernel/entry_32.S

@@ -760,7 +760,6 @@ ptregs_##name: \
 
 PTREGSCALL1(iopl)
 PTREGSCALL0(fork)
-PTREGSCALL0(clone)
 PTREGSCALL0(vfork)
 PTREGSCALL3(execve)
 PTREGSCALL2(sigaltstack)
@@ -769,6 +768,19 @@ PTREGSCALL0(rt_sigreturn)
 PTREGSCALL2(vm86)
 PTREGSCALL1(vm86old)
 
+/* Clone is an oddball.  The 4th arg is in %edi */
+	ALIGN;
+ptregs_clone:
+	leal 4(%esp),%eax
+	pushl %eax
+	pushl PT_EDI(%eax)
+	movl PT_EDX(%eax),%ecx
+	movl PT_ECX(%eax),%edx
+	movl PT_EBX(%eax),%eax
+	call sys_clone
+	addl $8,%esp
+	ret
+
 .macro FIXUP_ESPFIX_STACK
 /*
  * Switch back for ESPFIX stack to the normal zerobased stack