Merge with master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6.git

13 files changed, 160 insertions, 184 deletions

diff --git a/arch/ppc64/kernel/entry.S b/arch/ppc64/kernel/entry.S
index d3604056e1a..b61572eb2a7 100644
--- a/arch/ppc64/kernel/entry.S
+++ b/arch/ppc64/kernel/entry.S
@@ -436,15 +436,6 @@ END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
 	REST_8GPRS(14, r1)
 	REST_10GPRS(22, r1)
 
-#ifdef CONFIG_PPC_ISERIES
-	clrrdi	r7,r1,THREAD_SHIFT	/* get current_thread_info() */
-	ld	r7,TI_FLAGS(r7)		/* Get run light flag */
-	mfspr	r9,CTRLF
-	srdi	r7,r7,TIF_RUN_LIGHT
-	insrdi	r9,r7,1,63		/* Insert run light into CTRL */
-	mtspr	CTRLT,r9
-#endif
-
 	/* convert old thread to its task_struct for return value */
 	addi	r3,r3,-THREAD
 	ld	r7,_NIP(r1)	/* Return to _switch caller in new task */
diff --git a/arch/ppc64/kernel/head.S b/arch/ppc64/kernel/head.S
index 92a744c31ab..346dbf606b5 100644
--- a/arch/ppc64/kernel/head.S
+++ b/arch/ppc64/kernel/head.S
@@ -626,10 +626,10 @@ system_reset_iSeries:
 	lhz	r24,PACAPACAINDEX(r13)	/* Get processor # */
 	cmpwi	0,r24,0			/* Are we processor 0? */
 	beq	.__start_initialization_iSeries	/* Start up the first processor */
-	mfspr	r4,CTRLF
-	li	r5,RUNLATCH		/* Turn off the run light */
+	mfspr	r4,SPRN_CTRLF
+	li	r5,CTRL_RUNLATCH	/* Turn off the run light */
 	andc	r4,r4,r5
-	mtspr	CTRLT,r4
+	mtspr	SPRN_CTRLT,r4
 
 1:
 	HMT_LOW
@@ -2082,9 +2082,9 @@ _GLOBAL(hmt_start_secondary)
 	mfspr	r4, HID0
 	ori	r4, r4, 0x1
 	mtspr	HID0, r4
-	mfspr	r4, CTRLF
+	mfspr	r4, SPRN_CTRLF
 	oris	r4, r4, 0x40
-	mtspr	CTRLT, r4
+	mtspr	SPRN_CTRLT, r4
 	blr
 #endif
 
diff --git a/arch/ppc64/kernel/iSeries_setup.c b/arch/ppc64/kernel/iSeries_setup.c
index da20120f226..6d06eb550a3 100644
--- a/arch/ppc64/kernel/iSeries_setup.c
+++ b/arch/ppc64/kernel/iSeries_setup.c
@@ -852,6 +852,28 @@ static int __init iSeries_src_init(void)
 
 late_initcall(iSeries_src_init);
 
+static int set_spread_lpevents(char *str)
+{
+	unsigned long i;
+	unsigned long val = simple_strtoul(str, NULL, 0);
+
+	/*
+	 * The parameter is the number of processors to share in processing
+	 * lp events.
+	 */
+	if (( val > 0) && (val <= NR_CPUS)) {
+		for (i = 1; i < val; ++i)
+			paca[i].lpqueue_ptr = paca[0].lpqueue_ptr;
+
+		printk("lpevent processing spread over %ld processors\n", val);
+	} else {
+		printk("invalid spread_lpevents %ld\n", val);
+	}
+
+	return 1;
+}
+__setup("spread_lpevents=", set_spread_lpevents);
+
 void __init iSeries_early_setup(void)
 {
 	iSeries_fixup_klimit();
diff --git a/arch/ppc64/kernel/idle.c b/arch/ppc64/kernel/idle.c
index 6abc621d3ba..f24ce2b8720 100644
--- a/arch/ppc64/kernel/idle.c
+++ b/arch/ppc64/kernel/idle.c
@@ -75,13 +75,9 @@ static int iSeries_idle(void)
 {
 	struct paca_struct *lpaca;
 	long oldval;
-	unsigned long CTRL;
 
 	/* ensure iSeries run light will be out when idle */
-	clear_thread_flag(TIF_RUN_LIGHT);
-	CTRL = mfspr(CTRLF);
-	CTRL &= ~RUNLATCH;
-	mtspr(CTRLT, CTRL);
+	ppc64_runlatch_off();
 
 	lpaca = get_paca();
 
@@ -111,7 +107,9 @@ static int iSeries_idle(void)
 			}
 		}
 
+		ppc64_runlatch_on();
 		schedule();
+		ppc64_runlatch_off();
 	}
 
 	return 0;
diff --git a/arch/ppc64/kernel/kprobes.c b/arch/ppc64/kernel/kprobes.c
index 103daaf7357..e950a2058a1 100644
--- a/arch/ppc64/kernel/kprobes.c
+++ b/arch/ppc64/kernel/kprobes.c
@@ -45,12 +45,17 @@ static struct pt_regs jprobe_saved_regs;
 
 int arch_prepare_kprobe(struct kprobe *p)
 {
+	int ret = 0;
 	kprobe_opcode_t insn = *p->addr;
 
-	if (IS_MTMSRD(insn) || IS_RFID(insn))
-		/* cannot put bp on RFID/MTMSRD */
-		return 1;
-	return 0;
+	if ((unsigned long)p->addr & 0x03) {
+		printk("Attempt to register kprobe at an unaligned address\n");
+		ret = -EINVAL;
+	} else if (IS_MTMSRD(insn) || IS_RFID(insn)) {
+		printk("Cannot register a kprobe on rfid or mtmsrd\n");
+		ret = -EINVAL;
+	}
+	return ret;
 }
 
 void arch_copy_kprobe(struct kprobe *p)
@@ -172,8 +177,6 @@ static void resume_execution(struct kprobe *p, struct pt_regs *regs)
 	ret = emulate_step(regs, p->ainsn.insn[0]);
 	if (ret == 0)
 		regs->nip = (unsigned long)p->addr + 4;
-
-	regs->msr &= ~MSR_SE;
 }
 
 static inline int post_kprobe_handler(struct pt_regs *regs)
@@ -210,6 +213,7 @@ static inline int kprobe_fault_handler(struct pt_regs *regs, int trapnr)
 
 	if (kprobe_status & KPROBE_HIT_SS) {
 		resume_execution(current_kprobe, regs);
+		regs->msr &= ~MSR_SE;
 		regs->msr |= kprobe_saved_msr;
 
 		unlock_kprobes();
@@ -233,8 +237,6 @@ int kprobe_exceptions_notify(struct notifier_block *self, unsigned long val,
 	 */
 	preempt_disable();
 	switch (val) {
-	case DIE_IABR_MATCH:
-	case DIE_DABR_MATCH:
 	case DIE_BPT:
 		if (kprobe_handler(args->regs))
 			ret = NOTIFY_STOP;
diff --git a/arch/ppc64/kernel/misc.S b/arch/ppc64/kernel/misc.S
index b944717c1db..e3c73b3425d 100644
--- a/arch/ppc64/kernel/misc.S
+++ b/arch/ppc64/kernel/misc.S
@@ -792,7 +792,7 @@ _GLOBAL(sys_call_table32)
 	.llong .compat_sys_newstat
 	.llong .compat_sys_newlstat
 	.llong .compat_sys_newfstat
-	.llong .sys_uname
+	.llong .sys32_uname
 	.llong .sys_ni_syscall		/* 110 old iopl syscall */
 	.llong .sys_vhangup
 	.llong .sys_ni_syscall		/* old idle syscall */
diff --git a/arch/ppc64/kernel/process.c b/arch/ppc64/kernel/process.c
index 8b068612273..cdfecbeb331 100644
--- a/arch/ppc64/kernel/process.c
+++ b/arch/ppc64/kernel/process.c
@@ -378,9 +378,6 @@ copy_thread(int nr, unsigned long clone_flags, unsigned long usp,
 		childregs->gpr[1] = sp + sizeof(struct pt_regs);
 		p->thread.regs = NULL;	/* no user register state */
 		clear_ti_thread_flag(p->thread_info, TIF_32BIT);
-#ifdef CONFIG_PPC_ISERIES
-		set_ti_thread_flag(p->thread_info, TIF_RUN_LIGHT);
-#endif
 	} else {
 		childregs->gpr[1] = usp;
 		p->thread.regs = childregs;
diff --git a/arch/ppc64/kernel/prom_init.c b/arch/ppc64/kernel/prom_init.c
index 3de950de367..b7683abfbe6 100644
--- a/arch/ppc64/kernel/prom_init.c
+++ b/arch/ppc64/kernel/prom_init.c
@@ -211,13 +211,23 @@ struct {
  */
 #define ADDR(x)		(u32) ((unsigned long)(x) - offset)
 
+/*
+ * Error results ... some OF calls will return "-1" on error, some
+ * will return 0, some will return either. To simplify, here are
+ * macros to use with any ihandle or phandle return value to check if
+ * it is valid
+ */
+
+#define PROM_ERROR		(-1u)
+#define PHANDLE_VALID(p)	((p) != 0 && (p) != PROM_ERROR)
+#define IHANDLE_VALID(i)	((i) != 0 && (i) != PROM_ERROR)
+
+
 /* This is the one and *ONLY* place where we actually call open
  * firmware from, since we need to make sure we're running in 32b
  * mode when we do.  We switch back to 64b mode upon return.
  */
 
-#define PROM_ERROR	(-1)
-
 static int __init call_prom(const char *service, int nargs, int nret, ...)
 {
 	int i;
@@ -587,14 +597,13 @@ static void __init prom_send_capabilities(void)
 {
 	unsigned long offset = reloc_offset();
 	ihandle elfloader;
-	int ret;
 
 	elfloader = call_prom("open", 1, 1, ADDR("/packages/elf-loader"));
 	if (elfloader == 0) {
 		prom_printf("couldn't open /packages/elf-loader\n");
 		return;
 	}
-	ret = call_prom("call-method", 3, 1, ADDR("process-elf-header"),
+	call_prom("call-method", 3, 1, ADDR("process-elf-header"),
 			elfloader, ADDR(&fake_elf));
 	call_prom("close", 1, 0, elfloader);
 }
@@ -646,7 +655,7 @@ static unsigned long __init alloc_up(unsigned long size, unsigned long align)
 	    base = _ALIGN_UP(base + 0x100000, align)) {
 		prom_debug("    trying: 0x%x\n\r", base);
 		addr = (unsigned long)prom_claim(base, size, 0);
-		if ((int)addr != PROM_ERROR)
+		if (addr != PROM_ERROR)
 			break;
 		addr = 0;
 		if (align == 0)
@@ -708,7 +717,7 @@ static unsigned long __init alloc_down(unsigned long size, unsigned long align,
 	for(; base > RELOC(alloc_bottom); base = _ALIGN_DOWN(base - 0x100000, align))  {
 		prom_debug("    trying: 0x%x\n\r", base);
 		addr = (unsigned long)prom_claim(base, size, 0);
-		if ((int)addr != PROM_ERROR)
+		if (addr != PROM_ERROR)
 			break;
 		addr = 0;
 	}
@@ -902,18 +911,19 @@ static void __init prom_instantiate_rtas(void)
 {
 	unsigned long offset = reloc_offset();
 	struct prom_t *_prom = PTRRELOC(&prom);
-	phandle prom_rtas, rtas_node;
+	phandle rtas_node;
+	ihandle rtas_inst;
 	u32 base, entry = 0;
 	u32 size = 0;
 
 	prom_debug("prom_instantiate_rtas: start...\n");
 
-	prom_rtas = call_prom("finddevice", 1, 1, ADDR("/rtas"));
-	prom_debug("prom_rtas: %x\n", prom_rtas);
-	if (prom_rtas == (phandle) -1)
+	rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas"));
+	prom_debug("rtas_node: %x\n", rtas_node);
+	if (!PHANDLE_VALID(rtas_node))
 		return;
 
-	prom_getprop(prom_rtas, "rtas-size", &size, sizeof(size));
+	prom_getprop(rtas_node, "rtas-size", &size, sizeof(size));
 	if (size == 0)
 		return;
 
@@ -922,14 +932,18 @@ static void __init prom_instantiate_rtas(void)
 		prom_printf("RTAS allocation failed !\n");
 		return;
 	}
-	prom_printf("instantiating rtas at 0x%x", base);
 
-	rtas_node = call_prom("open", 1, 1, ADDR("/rtas"));
-	prom_printf("...");
+	rtas_inst = call_prom("open", 1, 1, ADDR("/rtas"));
+	if (!IHANDLE_VALID(rtas_inst)) {
+		prom_printf("opening rtas package failed");
+		return;
+	}
+
+	prom_printf("instantiating rtas at 0x%x ...", base);
 
 	if (call_prom("call-method", 3, 2,
 		      ADDR("instantiate-rtas"),
-		      rtas_node, base) != PROM_ERROR) {
+		      rtas_inst, base) != PROM_ERROR) {
 		entry = (long)_prom->args.rets[1];
 	}
 	if (entry == 0) {
@@ -940,8 +954,8 @@ static void __init prom_instantiate_rtas(void)
 
 	reserve_mem(base, size);
 
-	prom_setprop(prom_rtas, "linux,rtas-base", &base, sizeof(base));
-	prom_setprop(prom_rtas, "linux,rtas-entry", &entry, sizeof(entry));
+	prom_setprop(rtas_node, "linux,rtas-base", &base, sizeof(base));
+	prom_setprop(rtas_node, "linux,rtas-entry", &entry, sizeof(entry));
 
 	prom_debug("rtas base     = 0x%x\n", base);
 	prom_debug("rtas entry    = 0x%x\n", entry);
@@ -1062,7 +1076,7 @@ static void __init prom_initialize_tce_table(void)
 
 		prom_printf("opening PHB %s", path);
 		phb_node = call_prom("open", 1, 1, path);
-		if ( (long)phb_node <= 0)
+		if (phb_node == 0)
 			prom_printf("... failed\n");
 		else
 			prom_printf("... done\n");
@@ -1279,12 +1293,12 @@ static void __init prom_init_client_services(unsigned long pp)
 
 	/* get a handle for the stdout device */
 	_prom->chosen = call_prom("finddevice", 1, 1, ADDR("/chosen"));
-	if ((long)_prom->chosen <= 0)
+	if (!PHANDLE_VALID(_prom->chosen))
 		prom_panic("cannot find chosen"); /* msg won't be printed :( */
 
 	/* get device tree root */
 	_prom->root = call_prom("finddevice", 1, 1, ADDR("/"));
-	if ((long)_prom->root <= 0)
+	if (!PHANDLE_VALID(_prom->root))
 		prom_panic("cannot find device tree root"); /* msg won't be printed :( */
 }
 
@@ -1356,9 +1370,8 @@ static int __init prom_find_machine_type(void)
 	}
 	/* Default to pSeries. We need to know if we are running LPAR */
 	rtas = call_prom("finddevice", 1, 1, ADDR("/rtas"));
-	if (rtas != (phandle) -1) {
-		unsigned long x;
-		x = prom_getproplen(rtas, "ibm,hypertas-functions");
+	if (PHANDLE_VALID(rtas)) {
+		int x = prom_getproplen(rtas, "ibm,hypertas-functions");
 		if (x != PROM_ERROR) {
 			prom_printf("Hypertas detected, assuming LPAR !\n");
 			return PLATFORM_PSERIES_LPAR;
@@ -1426,12 +1439,13 @@ static void __init prom_check_displays(void)
 		 * leave some room at the end of the path for appending extra
 		 * arguments
 		 */
-		if (call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-10) < 0)
+		if (call_prom("package-to-path", 3, 1, node, path,
+			      PROM_SCRATCH_SIZE-10) == PROM_ERROR)
 			continue;
 		prom_printf("found display   : %s, opening ... ", path);
 		
 		ih = call_prom("open", 1, 1, path);
-		if (ih == (ihandle)0 || ih == (ihandle)-1) {
+		if (ih == 0) {
 			prom_printf("failed\n");
 			continue;
 		}
@@ -1514,6 +1528,12 @@ static unsigned long __init dt_find_string(char *str)
 	return 0;
 }
 
+/*
+ * The Open Firmware 1275 specification states properties must be 31 bytes or
+ * less, however not all firmwares obey this. Make it 64 bytes to be safe.
+ */
+#define MAX_PROPERTY_NAME 64
+
 static void __init scan_dt_build_strings(phandle node, unsigned long *mem_start,
 					 unsigned long *mem_end)
 {
@@ -1527,10 +1547,12 @@ static void __init scan_dt_build_strings(phandle node, unsigned long *mem_start,
 	/* get and store all property names */
 	prev_name = RELOC("");
 	for (;;) {
-		
-		/* 32 is max len of name including nul. */
-		namep = make_room(mem_start, mem_end, 32, 1);
-		if (call_prom("nextprop", 3, 1, node, prev_name, namep) <= 0) {
+		int rc;
+
+		/* 64 is max len of name including nul. */
+		namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1);
+		rc = call_prom("nextprop", 3, 1, node, prev_name, namep);
+		if (rc != 1) {
 			/* No more nodes: unwind alloc */
 			*mem_start = (unsigned long)namep;
 			break;
@@ -1555,12 +1577,6 @@ static void __init scan_dt_build_strings(phandle node, unsigned long *mem_start,
 	}
 }
 
-/*
- * The Open Firmware 1275 specification states properties must be 31 bytes or
- * less, however not all firmwares obey this. Make it 64 bytes to be safe.
- */
-#define MAX_PROPERTY_NAME 64
-
 static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
 					unsigned long *mem_end)
 {
@@ -1607,7 +1623,10 @@ static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
 	prev_name = RELOC("");
 	sstart = (char *)RELOC(dt_string_start);
 	for (;;) {
-		if (call_prom("nextprop", 3, 1, node, prev_name, pname) <= 0)
+		int rc;
+
+		rc = call_prom("nextprop", 3, 1, node, prev_name, pname);
+		if (rc != 1)
 			break;
 
 		/* find string offset */
@@ -1623,7 +1642,7 @@ static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
 		l = call_prom("getproplen", 2, 1, node, pname);
 
 		/* sanity checks */
-		if (l < 0)
+		if (l == PROM_ERROR)
 			continue;
 		if (l > MAX_PROPERTY_LENGTH) {
 			prom_printf("WARNING: ignoring large property ");
@@ -1771,17 +1790,18 @@ static void __init fixup_device_tree(void)
 
 	/* Some G5s have a missing interrupt definition, fix it up here */
 	u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000"));
-	if ((long)u3 <= 0)
+	if (!PHANDLE_VALID(u3))
 		return;
 	i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000"));
-	if ((long)i2c <= 0)
+	if (!PHANDLE_VALID(i2c))
 		return;
 	mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000"));
-	if ((long)mpic <= 0)
+	if (!PHANDLE_VALID(mpic))
 		return;
 
 	/* check if proper rev of u3 */
-	if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev)) <= 0)
+	if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev))
+	    == PROM_ERROR)
 		return;
 	if (u3_rev != 0x35)
 		return;
diff --git a/arch/ppc64/kernel/setup.c b/arch/ppc64/kernel/setup.c
index 21c57f539c2..dce198d3932 100644
--- a/arch/ppc64/kernel/setup.c
+++ b/arch/ppc64/kernel/setup.c
@@ -103,11 +103,6 @@ extern void unflatten_device_tree(void);
 
 extern void smp_release_cpus(void);
 
-unsigned long decr_overclock = 1;
-unsigned long decr_overclock_proc0 = 1;
-unsigned long decr_overclock_set = 0;
-unsigned long decr_overclock_proc0_set = 0;
-
 int have_of = 1;
 int boot_cpuid = 0;
 int boot_cpuid_phys = 0;
@@ -1120,64 +1115,15 @@ void ppc64_dump_msg(unsigned int src, const char *msg)
 	printk("[dump]%04x %s\n", src, msg);
 }
 
-int set_spread_lpevents( char * str )
-{
-	/* The parameter is the number of processors to share in processing lp events */
-	unsigned long i;
-	unsigned long val = simple_strtoul( str, NULL, 0 );
-	if ( ( val > 0 ) && ( val <= NR_CPUS ) ) {
-		for ( i=1; i<val; ++i )
-			paca[i].lpqueue_ptr = paca[0].lpqueue_ptr;
-		printk("lpevent processing spread over %ld processors\n", val);
-	}
-	else
-		printk("invalid spreaqd_lpevents %ld\n", val);
-	return 1;
-}	
-
 /* This should only be called on processor 0 during calibrate decr */
 void setup_default_decr(void)
 {
 	struct paca_struct *lpaca = get_paca();
 
-	if ( decr_overclock_set && !decr_overclock_proc0_set )
-		decr_overclock_proc0 = decr_overclock;
-
-	lpaca->default_decr = tb_ticks_per_jiffy / decr_overclock_proc0;	
+	lpaca->default_decr = tb_ticks_per_jiffy;
 	lpaca->next_jiffy_update_tb = get_tb() + tb_ticks_per_jiffy;
 }
 
-int set_decr_overclock_proc0( char * str )
-{
-	unsigned long val = simple_strtoul( str, NULL, 0 );
-	if ( ( val >= 1 ) && ( val <= 48 ) ) {
-		decr_overclock_proc0_set = 1;
-		decr_overclock_proc0 = val;
-		printk("proc 0 decrementer overclock factor of %ld\n", val);
-	}
-	else
-		printk("invalid proc 0 decrementer overclock factor of %ld\n", val);
-	return 1;
-}
-
-int set_decr_overclock( char * str )
-{
-	unsigned long val = simple_strtoul( str, NULL, 0 );
-	if ( ( val >= 1 ) && ( val <= 48 ) ) {
-		decr_overclock_set = 1;
-		decr_overclock = val;
-		printk("decrementer overclock factor of %ld\n", val);
-	}
-	else
-		printk("invalid decrementer overclock factor of %ld\n", val);
-	return 1;
-
-}
-
-__setup("spread_lpevents=", set_spread_lpevents );
-__setup("decr_overclock_proc0=", set_decr_overclock_proc0 );
-__setup("decr_overclock=", set_decr_overclock );
-
 #ifndef CONFIG_PPC_ISERIES
 /*
  * This function can be used by platforms to "find" legacy serial ports.
diff --git a/arch/ppc64/kernel/smp.c b/arch/ppc64/kernel/smp.c
index 3b906cd9403..9ef5d36d6b2 100644
--- a/arch/ppc64/kernel/smp.c
+++ b/arch/ppc64/kernel/smp.c
@@ -334,7 +334,6 @@ void smp_call_function_interrupt(void)
 	}
 }
 
-extern unsigned long decr_overclock;
 extern struct gettimeofday_struct do_gtod;
 
 struct thread_info *current_set[NR_CPUS];
@@ -491,7 +490,7 @@ int __devinit __cpu_up(unsigned int cpu)
 	if (smp_ops->cpu_bootable && !smp_ops->cpu_bootable(cpu))
 		return -EINVAL;
 
-	paca[cpu].default_decr = tb_ticks_per_jiffy / decr_overclock;
+	paca[cpu].default_decr = tb_ticks_per_jiffy;
 
 	if (!cpu_has_feature(CPU_FTR_SLB)) {
 		void *tmp;
diff --git a/arch/ppc64/kernel/sys_ppc32.c b/arch/ppc64/kernel/sys_ppc32.c
index 7cf7a960002..9c8e317c598 100644
--- a/arch/ppc64/kernel/sys_ppc32.c
+++ b/arch/ppc64/kernel/sys_ppc32.c
@@ -791,31 +791,6 @@ asmlinkage int sys32_pciconfig_iobase(u32 which, u32 in_bus, u32 in_devfn)
 }
 
 
-asmlinkage int ppc64_newuname(struct new_utsname __user * name)
-{
-	int errno = sys_newuname(name);
-
-	if (current->personality == PER_LINUX32 && !errno) {
-		if(copy_to_user(name->machine, "ppc\0\0", 8)) {
-			errno = -EFAULT;
-		}
-	}
-	return errno;
-}
-
-asmlinkage int ppc64_personality(unsigned long personality)
-{
-	int ret;
-	if (current->personality == PER_LINUX32 && personality == PER_LINUX)
-		personality = PER_LINUX32;
-	ret = sys_personality(personality);
-	if (ret == PER_LINUX32)
-		ret = PER_LINUX;
-	return ret;
-}
-
-
-
 /* Note: it is necessary to treat mode as an unsigned int,
  * with the corresponding cast to a signed int to insure that the 
  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
@@ -1158,26 +1133,47 @@ asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
 }
 #endif
 
+asmlinkage int sys32_uname(struct old_utsname __user * name)
+{
+	int err = 0;
+	
+	down_read(&uts_sem);
+	if (copy_to_user(name, &system_utsname, sizeof(*name)))
+		err = -EFAULT;
+	up_read(&uts_sem);
+	if (!err && personality(current->personality) == PER_LINUX32) {
+		/* change "ppc64" to "ppc" */
+		if (__put_user(0, name->machine + 3)
+		    || __put_user(0, name->machine + 4))
+			err = -EFAULT;
+	}
+	return err;
+}
+
 asmlinkage int sys32_olduname(struct oldold_utsname __user * name)
 {
 	int error;
-	
-	if (!name)
-		return -EFAULT;
+
 	if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname)))
 		return -EFAULT;
   
 	down_read(&uts_sem);
 	error = __copy_to_user(&name->sysname,&system_utsname.sysname,__OLD_UTS_LEN);
-	error -= __put_user(0,name->sysname+__OLD_UTS_LEN);
-	error -= __copy_to_user(&name->nodename,&system_utsname.nodename,__OLD_UTS_LEN);
-	error -= __put_user(0,name->nodename+__OLD_UTS_LEN);
-	error -= __copy_to_user(&name->release,&system_utsname.release,__OLD_UTS_LEN);
-	error -= __put_user(0,name->release+__OLD_UTS_LEN);
-	error -= __copy_to_user(&name->version,&system_utsname.version,__OLD_UTS_LEN);
-	error -= __put_user(0,name->version+__OLD_UTS_LEN);
-	error -= __copy_to_user(&name->machine,&system_utsname.machine,__OLD_UTS_LEN);
-	error = __put_user(0,name->machine+__OLD_UTS_LEN);
+	error |= __put_user(0,name->sysname+__OLD_UTS_LEN);
+	error |= __copy_to_user(&name->nodename,&system_utsname.nodename,__OLD_UTS_LEN);
+	error |= __put_user(0,name->nodename+__OLD_UTS_LEN);
+	error |= __copy_to_user(&name->release,&system_utsname.release,__OLD_UTS_LEN);
+	error |= __put_user(0,name->release+__OLD_UTS_LEN);
+	error |= __copy_to_user(&name->version,&system_utsname.version,__OLD_UTS_LEN);
+	error |= __put_user(0,name->version+__OLD_UTS_LEN);
+	error |= __copy_to_user(&name->machine,&system_utsname.machine,__OLD_UTS_LEN);
+	error |= __put_user(0,name->machine+__OLD_UTS_LEN);
+	if (personality(current->personality) == PER_LINUX32) {
+		/* change "ppc64" to "ppc" */
+		error |= __put_user(0, name->machine + 3);
+		error |= __put_user(0, name->machine + 4);
+	}
+	
 	up_read(&uts_sem);
 
 	error = error ? -EFAULT : 0;
diff --git a/arch/ppc64/kernel/syscalls.c b/arch/ppc64/kernel/syscalls.c
index f2865ff8d2f..a8cbb202b8c 100644
--- a/arch/ppc64/kernel/syscalls.c
+++ b/arch/ppc64/kernel/syscalls.c
@@ -199,24 +199,33 @@ out:
 	return ret;
 }
 
-static int __init set_fakeppc(char *str)
+long ppc64_personality(unsigned long personality)
 {
-	if (*str)
-		return 0;
-	init_task.personality = PER_LINUX32;
-	return 1;
+	long ret;
+
+	if (personality(current->personality) == PER_LINUX32
+	    && personality == PER_LINUX)
+		personality = PER_LINUX32;
+	ret = sys_personality(personality);
+	if (ret == PER_LINUX32)
+		ret = PER_LINUX;
+	return ret;
 }
-__setup("fakeppc", set_fakeppc);
 
-asmlinkage int sys_uname(struct old_utsname __user * name)
+long ppc64_newuname(struct new_utsname __user * name)
 {
-	int err = -EFAULT;
-	
+	int err = 0;
+
 	down_read(&uts_sem);
-	if (name && !copy_to_user(name, &system_utsname, sizeof (*name)))
-		err = 0;
+	if (copy_to_user(name, &system_utsname, sizeof(*name)))
+		err = -EFAULT;
 	up_read(&uts_sem);
-	
+	if (!err && personality(current->personality) == PER_LINUX32) {
+		/* change ppc64 to ppc */
+		if (__put_user(0, name->machine + 3)
+		    || __put_user(0, name->machine + 4))
+			err = -EFAULT;
+	}
 	return err;
 }
 
diff --git a/arch/ppc64/kernel/sysfs.c b/arch/ppc64/kernel/sysfs.c
index 0925694c3ce..c8fa6569b2f 100644
--- a/arch/ppc64/kernel/sysfs.c
+++ b/arch/ppc64/kernel/sysfs.c
@@ -113,7 +113,6 @@ void ppc64_enable_pmcs(void)
 #ifdef CONFIG_PPC_PSERIES
 	unsigned long set, reset;
 	int ret;
-	unsigned int ctrl;
 #endif /* CONFIG_PPC_PSERIES */
 
 	/* Only need to enable them once */
@@ -167,11 +166,8 @@ void ppc64_enable_pmcs(void)
 	 * On SMT machines we have to set the run latch in the ctrl register
 	 * in order to make PMC6 spin.
 	 */
-	if (cpu_has_feature(CPU_FTR_SMT)) {
-		ctrl = mfspr(CTRLF);
-		ctrl |= RUNLATCH;
-		mtspr(CTRLT, ctrl);
-	}
+	if (cpu_has_feature(CPU_FTR_SMT))
+		ppc64_runlatch_on();
 #endif /* CONFIG_PPC_PSERIES */
 }