In vm_thread_swap{in|out}(), remove the alpha specific conditional

compilation and replace it with a call to cpu_thread_swap{in|out}().
This allows us to add similar code on ia64 without cluttering the
code even more.

sys/alpha/alpha/vm_machdep.c

@@ -265,6 +265,23 @@ cpu_thread_setup(struct thread *td)
 	td->td_frame = (struct trapframe *)((caddr_t)td->td_pcb) - 1;
 }
 
+void
+cpu_thread_swapin(struct thread *td)
+{
+	/*
+	 * The pcb may be at a different physical address now so cache the
+	 * new address.
+	 */
+	td->td_md.md_pcbpaddr = (void *)vtophys((vm_offset_t)td->td_pcb);
+}
+
+void
+cpu_thread_swapout(struct thread *td)
+{
+	/* Make sure we aren't fpcurthread. */
+	alpha_fpstate_save(td, 1);
+}
+
 void
 cpu_set_upcall(struct thread *td, struct thread *td0)
 {

sys/amd64/amd64/vm_machdep.c

@@ -198,6 +198,16 @@ cpu_thread_clean(struct thread *td)
 {
 }
 
+void
+cpu_thread_swapin(struct thread *td)
+{
+}
+
+void
+cpu_thread_swapout(struct thread *td)
+{
+}
+
 void
 cpu_sched_exit(td)
 	register struct thread *td;

sys/i386/i386/vm_machdep.c

@@ -300,6 +300,16 @@ cpu_thread_clean(struct thread *td)
 	}
 }
 
+void
+cpu_thread_swapin(struct thread *td)
+{
+}
+
+void
+cpu_thread_swapout(struct thread *td)
+{
+}
+
 void
 cpu_sched_exit(td)
 	register struct thread *td;

sys/ia64/ia64/vm_machdep.c

@@ -121,6 +121,16 @@ cpu_thread_setup(struct thread *td)
 	td->td_frame->tf_length = sizeof(struct trapframe);
 }
 
+void
+cpu_thread_swapin(struct thread *td)
+{
+}
+
+void
+cpu_thread_swapout(struct thread *td)
+{
+}
+
 void
 cpu_set_upcall(struct thread *td, struct thread *td0)
 {

sys/powerpc/aim/vm_machdep.c

@@ -257,8 +257,6 @@ is_physical_memory(addr)
 void
 cpu_thread_exit(struct thread *td)     
 {
-
-	return;
 }
 
 void
@@ -269,20 +267,24 @@ cpu_thread_clean(struct thread *td)
 void
 cpu_thread_setup(struct thread *td)
 {
+}
 
-	return;
+void
+cpu_thread_swapin(struct thread *td)
+{
+}
+
+void
+cpu_thread_swapout(struct thread *td)
+{
 }
 
 void
 cpu_set_upcall(struct thread *td, struct thread *td0)
 {
-
-	return;
 }
 
 void
 cpu_set_upcall_kse(struct thread *td, struct kse_upcall *ku)
 {
-
-	return;
 }

sys/powerpc/powerpc/vm_machdep.c

@@ -257,8 +257,6 @@ is_physical_memory(addr)
 void
 cpu_thread_exit(struct thread *td)     
 {
-
-	return;
 }
 
 void
@@ -269,20 +267,24 @@ cpu_thread_clean(struct thread *td)
 void
 cpu_thread_setup(struct thread *td)
 {
+}
 
-	return;
+void
+cpu_thread_swapin(struct thread *td)
+{
+}
+
+void
+cpu_thread_swapout(struct thread *td)
+{
 }
 
 void
 cpu_set_upcall(struct thread *td, struct thread *td0)
 {
-
-	return;
 }
 
 void
 cpu_set_upcall_kse(struct thread *td, struct kse_upcall *ku)
 {
-
-	return;
 }

sys/sparc64/sparc64/vm_machdep.c

@@ -144,6 +144,16 @@ cpu_thread_setup(struct thread *td)
 	td->td_pcb = pcb;
 }
 
+void
+cpu_thread_swapin(struct thread *td)
+{
+}
+
+void
+cpu_thread_swapout(struct thread *td)
+{
+}
+
 void
 cpu_set_upcall(struct thread *td, struct thread *td0)
 {

sys/sys/proc.h

@@ -889,6 +889,8 @@ void	cpu_thread_clean(struct thread *);
 void	cpu_thread_exit(struct thread *);
 void	cpu_thread_setup(struct thread *td);
 void	cpu_thread_siginfo(int sig, u_long code, siginfo_t *si);
+void	cpu_thread_swapin(struct thread *);
+void	cpu_thread_swapout(struct thread *);
 void	kse_reassign(struct kse *ke);
 void	kse_link(struct kse *ke, struct ksegrp *kg);
 void	kse_unlink(struct kse *ke);

sys/vm/vm_glue.c

@@ -498,12 +498,7 @@ vm_thread_swapout(struct thread *td)
 	vm_page_t m;
 	int i, pages;
 
-#ifdef	__alpha__
-	/*
-	 * Make sure we aren't fpcurthread.
-	 */
-	alpha_fpstate_save(td, 1);
-#endif
+	cpu_thread_swapout(td);
 	pages = td->td_kstack_pages;
 	ksobj = td->td_kstack_obj;
 	pmap_qremove(td->td_kstack, pages);
@@ -550,13 +545,7 @@ vm_thread_swapin(struct thread *td)
 	}
 	VM_OBJECT_UNLOCK(ksobj);
 	pmap_qenter(td->td_kstack, ma, pages);
-#ifdef	__alpha__
-	/*
-	 * The pcb may be at a different physical address now so cache the
-	 * new address.
-	 */
-	td->td_md.md_pcbpaddr = (void *)vtophys((vm_offset_t)td->td_pcb);
-#endif
+	cpu_thread_swapin(td);
 }
 
 /*