Cleanup <machine/cpu.h> by moving MD prototypes to <machine/md_var.h>

like we have on other platforms. Move savectx() to <machine/pcb.h>.
A lot of files got these MD prototypes through the indirect inclusion
of <machine/cpu.h> and now need to include <machine/md_var.h>. The
number of which is unexpectedly large...

osf1_misc.c especially is tricky because szsigcode is redefined in
one of the osf1 header files. Reordering of the include files was
needed.

linprocfs.c now needs an explicit extern declaration.

Tested with: LINT

6 files changed, 28 insertions, 16 deletions

diff --git a/sys/alpha/pci/apecs.c b/sys/alpha/pci/apecs.c
index 3f895de..a94ac84 100644
--- a/sys/alpha/pci/apecs.c
+++ b/sys/alpha/pci/apecs.c
@@ -73,13 +73,15 @@ __FBSDID("$FreeBSD$");
 #include <alpha/pci/apecsreg.h>
 #include <alpha/pci/apecsvar.h>
 #include <alpha/isa/isavar.h>
+
+#include <machine/cpuconf.h>
 #include <machine/intr.h>
-#include <machine/resource.h>
 #include <machine/intrcnt.h>
-#include <machine/cpuconf.h>
-#include <machine/swiz.h>
+#include <machine/md_var.h>
+#include <machine/resource.h>
 #include <machine/rpb.h>
 #include <machine/sgmap.h>
+#include <machine/swiz.h>
 
 #include <vm/vm.h>
 #include <vm/vm_page.h>
diff --git a/sys/alpha/pci/cia.c b/sys/alpha/pci/cia.c
index e3f0615..962ac65 100644
--- a/sys/alpha/pci/cia.c
+++ b/sys/alpha/pci/cia.c
@@ -107,14 +107,16 @@ __FBSDID("$FreeBSD$");
 #include <alpha/pci/ciareg.h>
 #include <alpha/pci/ciavar.h>
 #include <alpha/isa/isavar.h>
+
 #include <machine/bwx.h>
-#include <machine/swiz.h>
+#include <machine/cpuconf.h>
 #include <machine/intr.h>
 #include <machine/intrcnt.h>
-#include <machine/cpuconf.h>
-#include <machine/rpb.h>
+#include <machine/md_var.h>
 #include <machine/resource.h>
+#include <machine/rpb.h>
 #include <machine/sgmap.h>
+#include <machine/swiz.h>
 
 #include <vm/vm.h>
 #include <vm/vm_page.h>
diff --git a/sys/alpha/pci/irongate.c b/sys/alpha/pci/irongate.c
index 017e6f9..ea314cb 100644
--- a/sys/alpha/pci/irongate.c
+++ b/sys/alpha/pci/irongate.c
@@ -43,12 +43,14 @@ __FBSDID("$FreeBSD$");
 #include <alpha/isa/isavar.h>
 #include <alpha/pci/irongatereg.h>
 #include <alpha/pci/irongatevar.h>
+
 #include <machine/bwx.h>
+#include <machine/cpuconf.h>
 #include <machine/intr.h>
 #include <machine/intrcnt.h>
-#include <machine/cpuconf.h>
-#include <machine/rpb.h>
+#include <machine/md_var.h>
 #include <machine/resource.h>
+#include <machine/rpb.h>
 #include <machine/sgmap.h>
 
 #include <vm/vm.h>
diff --git a/sys/alpha/pci/lca.c b/sys/alpha/pci/lca.c
index 548881e..b00cadb 100644
--- a/sys/alpha/pci/lca.c
+++ b/sys/alpha/pci/lca.c
@@ -39,10 +39,12 @@ __FBSDID("$FreeBSD$");
 #include <alpha/pci/lcareg.h>
 #include <alpha/pci/lcavar.h>
 #include <alpha/isa/isavar.h>
-#include <machine/intr.h>
+
 #include <machine/cpuconf.h>
-#include <machine/swiz.h>
+#include <machine/intr.h>
+#include <machine/md_var.h>
 #include <machine/sgmap.h>
+#include <machine/swiz.h>
 
 #include <vm/vm.h>
 #include <vm/vm_page.h>
diff --git a/sys/alpha/pci/t2.c b/sys/alpha/pci/t2.c
index c3f0f19..8db8a71 100644
--- a/sys/alpha/pci/t2.c
+++ b/sys/alpha/pci/t2.c
@@ -66,16 +66,18 @@ __FBSDID("$FreeBSD$");
 #include <sys/rman.h>
 #include <sys/interrupt.h>
 
+#include <pci/pcivar.h>
 #include <alpha/pci/t2reg.h>
 #include <alpha/pci/t2var.h>
 #include <alpha/isa/isavar.h>
+
+#include <machine/cpuconf.h>
 #include <machine/intr.h>
-#include <machine/resource.h>
 #include <machine/intrcnt.h>
-#include <machine/cpuconf.h>
-#include <machine/swiz.h>
+#include <machine/md_var.h>
+#include <machine/resource.h>
 #include <machine/sgmap.h>
-#include <pci/pcivar.h>
+#include <machine/swiz.h>
 
 #include <vm/vm.h>
 #include <vm/vm_page.h>
diff --git a/sys/alpha/pci/tsunami.c b/sys/alpha/pci/tsunami.c
index 6e43d8d..29e7718 100644
--- a/sys/alpha/pci/tsunami.c
+++ b/sys/alpha/pci/tsunami.c
@@ -46,12 +46,14 @@ __FBSDID("$FreeBSD$");
 #include <alpha/isa/isavar.h>
 #include <alpha/pci/tsunamireg.h>
 #include <alpha/pci/tsunamivar.h>
+
 #include <machine/bwx.h>
+#include <machine/cpuconf.h>
 #include <machine/intr.h>
 #include <machine/intrcnt.h>
-#include <machine/cpuconf.h>
-#include <machine/rpb.h>
+#include <machine/md_var.h>
 #include <machine/resource.h>
+#include <machine/rpb.h>
 #include <machine/sgmap.h>
 
 #include <vm/vm.h>