[PATCH] powerpc: remove do-nothing cpu setup routines

Removed the do-nothing routines __setup_cpu_power3 and
__setup_cpu_power4 and replaced them with a null pointer check
in the caller.  Also removed the Cell processor specific
routine __setup_cpu_be which improperly accessed the
hypervisor page size configuration at SPR HID6.

Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/kernel/cpu_setup_power4.S

@@ -73,23 +73,6 @@ _GLOBAL(__970_cpu_preinit)
 	isync
 	blr
 
-_GLOBAL(__setup_cpu_power4)
-	blr
-
-_GLOBAL(__setup_cpu_be)
-        /* Set large page sizes LP=0: 16MB, LP=1: 64KB */
-        addi    r3, 0,  0
-        ori     r3, r3, HID6_LB
-        sldi    r3, r3, 32
-        nor     r3, r3, r3
-        mfspr   r4, SPRN_HID6
-        and     r4, r4, r3
-        addi    r3, 0, 0x02000
-        sldi    r3, r3, 32
-        or      r4, r4, r3
-        mtspr   SPRN_HID6, r4
-	blr
-
 _GLOBAL(__setup_cpu_ppc970)
 	mfspr	r0,SPRN_HID0
 	li	r11,5			/* clear DOZE and SLEEP */

arch/powerpc/kernel/cputable.c

@@ -30,11 +30,7 @@ EXPORT_SYMBOL(cur_cpu_spec);
  * part of the cputable though. That has to be fixed for both ppc32
  * and ppc64
  */
-#ifdef CONFIG_PPC64
-extern void __setup_cpu_power3(unsigned long offset, struct cpu_spec* spec);
-extern void __setup_cpu_power4(unsigned long offset, struct cpu_spec* spec);
-extern void __setup_cpu_be(unsigned long offset, struct cpu_spec* spec);
-#else
+#ifdef CONFIG_PPC32
 extern void __setup_cpu_603(unsigned long offset, struct cpu_spec* spec);
 extern void __setup_cpu_604(unsigned long offset, struct cpu_spec* spec);
 extern void __setup_cpu_750(unsigned long offset, struct cpu_spec* spec);
@@ -82,7 +78,6 @@ struct cpu_spec	cpu_specs[] = {
 		.icache_bsize		= 128,
 		.dcache_bsize		= 128,
 		.num_pmcs		= 8,
-		.cpu_setup		= __setup_cpu_power3,
 		.oprofile_cpu_type	= "ppc64/power3",
 		.oprofile_type		= PPC_OPROFILE_RS64,
 		.platform		= "power3",
@@ -96,7 +91,6 @@ struct cpu_spec	cpu_specs[] = {
 		.icache_bsize		= 128,
 		.dcache_bsize		= 128,
 		.num_pmcs		= 8,
-		.cpu_setup		= __setup_cpu_power3,
 		.oprofile_cpu_type	= "ppc64/power3",
 		.oprofile_type		= PPC_OPROFILE_RS64,
 		.platform		= "power3",
@@ -110,7 +104,6 @@ struct cpu_spec	cpu_specs[] = {
 		.icache_bsize		= 128,
 		.dcache_bsize		= 128,
 		.num_pmcs		= 8,
-		.cpu_setup		= __setup_cpu_power3,
 		.oprofile_cpu_type	= "ppc64/rs64",
 		.oprofile_type		= PPC_OPROFILE_RS64,
 		.platform		= "rs64",
@@ -124,7 +117,6 @@ struct cpu_spec	cpu_specs[] = {
 		.icache_bsize		= 128,
 		.dcache_bsize		= 128,
 		.num_pmcs		= 8,
-		.cpu_setup		= __setup_cpu_power3,
 		.oprofile_cpu_type	= "ppc64/rs64",
 		.oprofile_type		= PPC_OPROFILE_RS64,
 		.platform		= "rs64",
@@ -138,7 +130,6 @@ struct cpu_spec	cpu_specs[] = {
 		.icache_bsize		= 128,
 		.dcache_bsize		= 128,
 		.num_pmcs		= 8,
-		.cpu_setup		= __setup_cpu_power3,
 		.oprofile_cpu_type	= "ppc64/rs64",
 		.oprofile_type		= PPC_OPROFILE_RS64,
 		.platform		= "rs64",
@@ -152,7 +143,6 @@ struct cpu_spec	cpu_specs[] = {
 		.icache_bsize		= 128,
 		.dcache_bsize		= 128,
 		.num_pmcs		= 8,
-		.cpu_setup		= __setup_cpu_power3,
 		.oprofile_cpu_type	= "ppc64/rs64",
 		.oprofile_type		= PPC_OPROFILE_RS64,
 		.platform		= "rs64",
@@ -166,7 +156,6 @@ struct cpu_spec	cpu_specs[] = {
 		.icache_bsize		= 128,
 		.dcache_bsize		= 128,
 		.num_pmcs		= 8,
-		.cpu_setup		= __setup_cpu_power4,
 		.oprofile_cpu_type	= "ppc64/power4",
 		.oprofile_type		= PPC_OPROFILE_POWER4,
 		.platform		= "power4",
@@ -180,7 +169,6 @@ struct cpu_spec	cpu_specs[] = {
 		.icache_bsize		= 128,
 		.dcache_bsize		= 128,
 		.num_pmcs		= 8,
-		.cpu_setup		= __setup_cpu_power4,
 		.oprofile_cpu_type	= "ppc64/power4",
 		.oprofile_type		= PPC_OPROFILE_POWER4,
 		.platform		= "power4",
@@ -246,7 +234,6 @@ struct cpu_spec	cpu_specs[] = {
 		.icache_bsize		= 128,
 		.dcache_bsize		= 128,
 		.num_pmcs		= 6,
-		.cpu_setup		= __setup_cpu_power4,
 		.oprofile_cpu_type	= "ppc64/power5",
 		.oprofile_type		= PPC_OPROFILE_POWER4,
 		.platform		= "power5",
@@ -260,7 +247,6 @@ struct cpu_spec	cpu_specs[] = {
 		.icache_bsize		= 128,
 		.dcache_bsize		= 128,
 		.num_pmcs		= 6,
-		.cpu_setup		= __setup_cpu_power4,
 		.oprofile_cpu_type	= "ppc64/power5+",
 		.oprofile_type		= PPC_OPROFILE_POWER4,
 		.platform		= "power5+",
@@ -274,7 +260,6 @@ struct cpu_spec	cpu_specs[] = {
 		.icache_bsize		= 128,
 		.dcache_bsize		= 128,
 		.num_pmcs		= 6,
-		.cpu_setup		= __setup_cpu_power4,
 		.oprofile_cpu_type	= "ppc64/power6",
 		.oprofile_type		= PPC_OPROFILE_POWER4,
 		.platform		= "power6",
@@ -289,7 +274,6 @@ struct cpu_spec	cpu_specs[] = {
 			PPC_FEATURE_SMT,
 		.icache_bsize		= 128,
 		.dcache_bsize		= 128,
-		.cpu_setup		= __setup_cpu_be,
 		.platform		= "ppc-cell-be",
 	},
 	{	/* default match */
@@ -301,7 +285,6 @@ struct cpu_spec	cpu_specs[] = {
 		.icache_bsize		= 128,
 		.dcache_bsize		= 128,
 		.num_pmcs		= 6,
-		.cpu_setup		= __setup_cpu_power4,
 		.platform		= "power4",
 	}
 #endif	/* CONFIG_PPC64 */

arch/powerpc/kernel/misc_32.S

@@ -216,7 +216,7 @@ _GLOBAL(call_setup_cpu)
 	lwz	r4,0(r4)
 	add	r4,r4,r3
 	lwz	r5,CPU_SPEC_SETUP(r4)
-	cmpi	0,r5,0
+	cmpwi	0,r5,0
 	add	r5,r5,r3
 	beqlr
 	mtctr	r5

arch/powerpc/kernel/misc_64.S

@@ -482,7 +482,9 @@ _GLOBAL(identify_cpu)
 	sub	r0,r3,r5
 	std	r0,0(r4)
 	ld	r4,CPU_SPEC_SETUP(r3)
+	cmpdi	0,r4,0
 	add	r4,r4,r5
+	beqlr
 	ld	r4,0(r4)
 	add	r4,r4,r5
 	mtctr	r4
@@ -768,9 +770,6 @@ _GLOBAL(giveup_altivec)
 
 #endif /* CONFIG_ALTIVEC */
 
-_GLOBAL(__setup_cpu_power3)
-	blr
-
 _GLOBAL(execve)
 	li	r0,__NR_execve
 	sc