diff --git a/arch/powerpc/include/asm/cache.h b/arch/powerpc/include/asm/cache.h
index 34a05a1a990bb1..0dc42c5082b74a 100644
--- a/arch/powerpc/include/asm/cache.h
+++ b/arch/powerpc/include/asm/cache.h
@@ -76,9 +76,6 @@ extern void _set_L3CR(unsigned long);
 #define _set_L3CR(val)	do { } while(0)
 #endif
 
-extern void cacheable_memzero(void *p, unsigned int nb);
-extern void *cacheable_memcpy(void *, const void *, unsigned int);
-
 #endif /* !__ASSEMBLY__ */
 #endif /* __KERNEL__ */
 #endif /* _ASM_POWERPC_CACHE_H */
diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h
index 0ef0fd660ac63a..c08de77f398af7 100644
--- a/arch/powerpc/include/asm/opal.h
+++ b/arch/powerpc/include/asm/opal.h
@@ -210,6 +210,8 @@ extern int opal_notifier_unregister(struct notifier_block *nb);
 
 extern int opal_message_notifier_register(enum opal_msg_type msg_type,
 						struct notifier_block *nb);
+extern int opal_message_notifier_unregister(enum opal_msg_type msg_type,
+					    struct notifier_block *nb);
 extern void opal_notifier_enable(void);
 extern void opal_notifier_disable(void);
 extern void opal_notifier_update_evt(uint64_t evt_mask, uint64_t evt_val);
diff --git a/arch/powerpc/lib/copy_32.S b/arch/powerpc/lib/copy_32.S
index 55f19f9fd70823..6813f80d1eec38 100644
--- a/arch/powerpc/lib/copy_32.S
+++ b/arch/powerpc/lib/copy_32.S
@@ -69,54 +69,6 @@ CACHELINE_BYTES = L1_CACHE_BYTES
 LG_CACHELINE_BYTES = L1_CACHE_SHIFT
 CACHELINE_MASK = (L1_CACHE_BYTES-1)
 
-/*
- * Use dcbz on the complete cache lines in the destination
- * to set them to zero.  This requires that the destination
- * area is cacheable.  -- paulus
- */
-_GLOBAL(cacheable_memzero)
-	mr	r5,r4
-	li	r4,0
-	addi	r6,r3,-4
-	cmplwi	0,r5,4
-	blt	7f
-	stwu	r4,4(r6)
-	beqlr
-	andi.	r0,r6,3
-	add	r5,r0,r5
-	subf	r6,r0,r6
-	clrlwi	r7,r6,32-LG_CACHELINE_BYTES
-	add	r8,r7,r5
-	srwi	r9,r8,LG_CACHELINE_BYTES
-	addic.	r9,r9,-1	/* total number of complete cachelines */
-	ble	2f
-	xori	r0,r7,CACHELINE_MASK & ~3
-	srwi.	r0,r0,2
-	beq	3f
-	mtctr	r0
-4:	stwu	r4,4(r6)
-	bdnz	4b
-3:	mtctr	r9
-	li	r7,4
-10:	dcbz	r7,r6
-	addi	r6,r6,CACHELINE_BYTES
-	bdnz	10b
-	clrlwi	r5,r8,32-LG_CACHELINE_BYTES
-	addi	r5,r5,4
-2:	srwi	r0,r5,2
-	mtctr	r0
-	bdz	6f
-1:	stwu	r4,4(r6)
-	bdnz	1b
-6:	andi.	r5,r5,3
-7:	cmpwi	0,r5,0
-	beqlr
-	mtctr	r5
-	addi	r6,r6,3
-8:	stbu	r4,1(r6)
-	bdnz	8b
-	blr
-
 _GLOBAL(memset)
 	rlwimi	r4,r4,8,16,23
 	rlwimi	r4,r4,16,0,15
@@ -142,85 +94,6 @@ _GLOBAL(memset)
 	bdnz	8b
 	blr
 
-/*
- * This version uses dcbz on the complete cache lines in the
- * destination area to reduce memory traffic.  This requires that
- * the destination area is cacheable.
- * We only use this version if the source and dest don't overlap.
- * -- paulus.
- */
-_GLOBAL(cacheable_memcpy)
-	add	r7,r3,r5		/* test if the src & dst overlap */
-	add	r8,r4,r5
-	cmplw	0,r4,r7
-	cmplw	1,r3,r8
-	crand	0,0,4			/* cr0.lt &= cr1.lt */
-	blt	memcpy			/* if regions overlap */
-
-	addi	r4,r4,-4
-	addi	r6,r3,-4
-	neg	r0,r3
-	andi.	r0,r0,CACHELINE_MASK	/* # bytes to start of cache line */
-	beq	58f
-
-	cmplw	0,r5,r0			/* is this more than total to do? */
-	blt	63f			/* if not much to do */
-	andi.	r8,r0,3			/* get it word-aligned first */
-	subf	r5,r0,r5
-	mtctr	r8
-	beq+	61f
-70:	lbz	r9,4(r4)		/* do some bytes */
-	stb	r9,4(r6)
-	addi	r4,r4,1
-	addi	r6,r6,1
-	bdnz	70b
-61:	srwi.	r0,r0,2
-	mtctr	r0
-	beq	58f
-72:	lwzu	r9,4(r4)		/* do some words */
-	stwu	r9,4(r6)
-	bdnz	72b
-
-58:	srwi.	r0,r5,LG_CACHELINE_BYTES /* # complete cachelines */
-	clrlwi	r5,r5,32-LG_CACHELINE_BYTES
-	li	r11,4
-	mtctr	r0
-	beq	63f
-53:
-	dcbz	r11,r6
-	COPY_16_BYTES
-#if L1_CACHE_BYTES >= 32
-	COPY_16_BYTES
-#if L1_CACHE_BYTES >= 64
-	COPY_16_BYTES
-	COPY_16_BYTES
-#if L1_CACHE_BYTES >= 128
-	COPY_16_BYTES
-	COPY_16_BYTES
-	COPY_16_BYTES
-	COPY_16_BYTES
-#endif
-#endif
-#endif
-	bdnz	53b
-
-63:	srwi.	r0,r5,2
-	mtctr	r0
-	beq	64f
-30:	lwzu	r0,4(r4)
-	stwu	r0,4(r6)
-	bdnz	30b
-
-64:	andi.	r0,r5,3
-	mtctr	r0
-	beq+	65f
-40:	lbz	r0,4(r4)
-	stb	r0,4(r6)
-	addi	r4,r4,1
-	addi	r6,r6,1
-	bdnz	40b
-65:	blr
-
 _GLOBAL(memmove)
 	cmplw	0,r3,r4
 	bgt	backwards_memcpy
diff --git a/arch/powerpc/lib/locks.c b/arch/powerpc/lib/locks.c
index 170a0346f7561f..f7deebdf33651f 100644
--- a/arch/powerpc/lib/locks.c
+++ b/arch/powerpc/lib/locks.c
@@ -41,6 +41,7 @@ void __spin_yield(arch_spinlock_t *lock)
 	plpar_hcall_norets(H_CONFER,
 		get_hard_smp_processor_id(holder_cpu), yield_count);
 }
+EXPORT_SYMBOL_GPL(__spin_yield);
 
 /*
  * Waiting for a read lock or a write lock on a rwlock...
diff --git a/arch/powerpc/lib/ppc_ksyms.c b/arch/powerpc/lib/ppc_ksyms.c
index f993959647b565..c7f8e958631618 100644
--- a/arch/powerpc/lib/ppc_ksyms.c
+++ b/arch/powerpc/lib/ppc_ksyms.c
@@ -8,10 +8,6 @@ EXPORT_SYMBOL(memset);
 EXPORT_SYMBOL(memmove);
 EXPORT_SYMBOL(memcmp);
 EXPORT_SYMBOL(memchr);
-#ifdef CONFIG_PPC32
-EXPORT_SYMBOL(cacheable_memcpy);
-EXPORT_SYMBOL(cacheable_memzero);
-#endif
 
 EXPORT_SYMBOL(strcpy);
 EXPORT_SYMBOL(strncpy);
diff --git a/arch/powerpc/mm/ppc_mmu_32.c b/arch/powerpc/mm/ppc_mmu_32.c
index 5029dc19b517cd..eb0e489b1bb788 100644
--- a/arch/powerpc/mm/ppc_mmu_32.c
+++ b/arch/powerpc/mm/ppc_mmu_32.c
@@ -224,7 +224,7 @@ void __init MMU_init_hw(void)
 	 */
 	if ( ppc_md.progress ) ppc_md.progress("hash:find piece", 0x322);
 	Hash = __va(memblock_alloc(Hash_size, Hash_size));
-	cacheable_memzero(Hash, Hash_size);
+	memset(Hash, 0, Hash_size);
 	_SDR1 = __pa(Hash) | SDR1_LOW_BITS;
 
 	Hash_end = (struct hash_pte *) ((unsigned long)Hash + Hash_size);
diff --git a/arch/powerpc/platforms/powermac/bootx_init.c b/arch/powerpc/platforms/powermac/bootx_init.c
index 3e91ef538114c6..76f5013c35e5c1 100644
--- a/arch/powerpc/platforms/powermac/bootx_init.c
+++ b/arch/powerpc/platforms/powermac/bootx_init.c
@@ -246,7 +246,7 @@ static void __init bootx_scan_dt_build_strings(unsigned long base,
 		DBG(" detected display ! adding properties names !\n");
 		bootx_dt_add_string("linux,boot-display", mem_end);
 		bootx_dt_add_string("linux,opened", mem_end);
-		strncpy(bootx_disp_path, namep, 255);
+		strlcpy(bootx_disp_path, namep, sizeof(bootx_disp_path));
 	}
 
 	/* get and store all property names */
diff --git a/arch/powerpc/platforms/powermac/pic.c b/arch/powerpc/platforms/powermac/pic.c
index 4c24bf60d39d28..59cfc9d63c2d51 100644
--- a/arch/powerpc/platforms/powermac/pic.c
+++ b/arch/powerpc/platforms/powermac/pic.c
@@ -321,6 +321,9 @@ static void __init pmac_pic_probe_oldstyle(void)
 		max_irqs = max_real_irqs = 64;
 
 		/* We might have a second cascaded heathrow */
+
+		/* Compensate for of_node_put() in of_find_node_by_name() */
+		of_node_get(master);
 		slave = of_find_node_by_name(master, "mac-io");
 
 		/* Check ordering of master & slave */
diff --git a/arch/powerpc/platforms/powernv/opal-flash.c b/arch/powerpc/platforms/powernv/opal-flash.c
index 5c21d9c07f4539..0ff07ff891f019 100644
--- a/arch/powerpc/platforms/powernv/opal-flash.c
+++ b/arch/powerpc/platforms/powernv/opal-flash.c
@@ -120,7 +120,11 @@ static struct image_header_t	image_header;
 static struct image_data_t	image_data;
 static struct validate_flash_t	validate_flash_data;
 static struct manage_flash_t	manage_flash_data;
-static struct update_flash_t	update_flash_data;
+
+/* Initialize update_flash_data status to No Operation */
+static struct update_flash_t	update_flash_data = {
+	.status = FLASH_NO_OP,
+};
 
 static DEFINE_MUTEX(image_data_mutex);
 
diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c
index 142a08a61bd1bb..d403b2b0862675 100644
--- a/arch/powerpc/platforms/powernv/opal.c
+++ b/arch/powerpc/platforms/powernv/opal.c
@@ -23,6 +23,8 @@
 #include <linux/kobject.h>
 #include <linux/delay.h>
 #include <linux/memblock.h>
+#include <linux/kthread.h>
+#include <linux/freezer.h>
 
 #include <asm/machdep.h>
 #include <asm/opal.h>
@@ -58,6 +60,7 @@ static struct atomic_notifier_head opal_msg_notifier_head[OPAL_MSG_TYPE_MAX];
 static DEFINE_SPINLOCK(opal_notifier_lock);
 static uint64_t last_notified_mask = 0x0ul;
 static atomic_t opal_notifier_hold = ATOMIC_INIT(0);
+static uint32_t opal_heartbeat;
 
 static void opal_reinit_cores(void)
 {
@@ -305,20 +308,23 @@ void opal_notifier_disable(void)
 int opal_message_notifier_register(enum opal_msg_type msg_type,
 					struct notifier_block *nb)
 {
-	if (!nb) {
-		pr_warning("%s: Invalid argument (%p)\n",
-			   __func__, nb);
-		return -EINVAL;
-	}
-	if (msg_type > OPAL_MSG_TYPE_MAX) {
-		pr_warning("%s: Invalid message type argument (%d)\n",
+	if (!nb || msg_type >= OPAL_MSG_TYPE_MAX) {
+		pr_warning("%s: Invalid arguments, msg_type:%d\n",
 			   __func__, msg_type);
 		return -EINVAL;
 	}
+
 	return atomic_notifier_chain_register(
 				&opal_msg_notifier_head[msg_type], nb);
 }
 
+int opal_message_notifier_unregister(enum opal_msg_type msg_type,
+				     struct notifier_block *nb)
+{
+	return atomic_notifier_chain_unregister(
+			&opal_msg_notifier_head[msg_type], nb);
+}
+
 static void opal_message_do_notify(uint32_t msg_type, void *msg)
 {
 	/* notify subscribers */
@@ -351,7 +357,7 @@ static void opal_handle_message(void)
 	type = be32_to_cpu(msg.msg_type);
 
 	/* Sanity check */
-	if (type > OPAL_MSG_TYPE_MAX) {
+	if (type >= OPAL_MSG_TYPE_MAX) {
 		pr_warning("%s: Unknown message type: %u\n", __func__, type);
 		return;
 	}
@@ -744,6 +750,29 @@ static void __init opal_irq_init(struct device_node *dn)
 	}
 }
 
+static int kopald(void *unused)
+{
+	set_freezable();
+	do {
+		try_to_freeze();
+		opal_poll_events(NULL);
+		msleep_interruptible(opal_heartbeat);
+	} while (!kthread_should_stop());
+
+	return 0;
+}
+
+static void opal_init_heartbeat(void)
+{
+	/* Old firwmware, we assume the HVC heartbeat is sufficient */
+	if (of_property_read_u32(opal_node, "ibm,heartbeat-ms",
+				 &opal_heartbeat) != 0)
+		opal_heartbeat = 0;
+
+	if (opal_heartbeat)
+		kthread_run(kopald, NULL, "kopald");
+}
+
 static int __init opal_init(void)
 {
 	struct device_node *np, *consoles;
@@ -772,6 +801,9 @@ static int __init opal_init(void)
 	/* Create i2c platform devices */
 	opal_i2c_create_devs();
 
+	/* Setup a heatbeat thread if requested by OPAL */
+	opal_init_heartbeat();
+
 	/* Find all OPAL interrupts and request them */
 	opal_irq_init(opal_node);
 
@@ -794,6 +826,7 @@ static int __init opal_init(void)
 		opal_msglog_init();
 	}
 
+	/* Initialize OPAL IPMI backend */
 	opal_ipmi_init(opal_node);
 
 	return 0;
diff --git a/drivers/macintosh/smu.c b/drivers/macintosh/smu.c
index 10ae69bcbbd2d4..d531f804455d25 100644
--- a/drivers/macintosh/smu.c
+++ b/drivers/macintosh/smu.c
@@ -557,8 +557,7 @@ int __init smu_init (void)
 	return 0;
 
 fail_msg_node:
-	if (smu->msg_node)
-		of_node_put(smu->msg_node);
+	of_node_put(smu->msg_node);
 fail_db_node:
 	of_node_put(smu->db_node);
 fail_bootmem:
diff --git a/drivers/macintosh/via-pmu.c b/drivers/macintosh/via-pmu.c
index dee88e59f0d34b..f9512bfa6c3c7d 100644
--- a/drivers/macintosh/via-pmu.c
+++ b/drivers/macintosh/via-pmu.c
@@ -329,10 +329,11 @@ int __init find_via_pmu(void)
 				gaddr = of_translate_address(gpiop, reg);
 			if (gaddr != OF_BAD_ADDR)
 				gpio_reg = ioremap(gaddr, 0x10);
+			of_node_put(gpiop);
 		}
 		if (gpio_reg == NULL) {
 			printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
-			goto fail_gpio;
+			goto fail;
 		}
 	} else
 		pmu_kind = PMU_UNKNOWN;
@@ -340,7 +341,7 @@ int __init find_via_pmu(void)
 	via = ioremap(taddr, 0x2000);
 	if (via == NULL) {
 		printk(KERN_ERR "via-pmu: Can't map address !\n");
-		goto fail;
+		goto fail_via_remap;
 	}
 	
 	out_8(&via[IER], IER_CLR | 0x7f);	/* disable all intrs */
@@ -348,10 +349,8 @@ int __init find_via_pmu(void)
 
 	pmu_state = idle;
 
-	if (!init_pmu()) {
-		via = NULL;
-		return 0;
-	}
+	if (!init_pmu())
+		goto fail_init;
 
 	printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
 	       PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
@@ -359,11 +358,15 @@ int __init find_via_pmu(void)
 	sys_ctrler = SYS_CTRLER_PMU;
 	
 	return 1;
- fail:
-	of_node_put(vias);
+
+ fail_init:
+	iounmap(via);
+	via = NULL;
+ fail_via_remap:
 	iounmap(gpio_reg);
 	gpio_reg = NULL;
- fail_gpio:
+ fail:
+	of_node_put(vias);
 	vias = NULL;
 	return 0;
 }
@@ -2109,7 +2112,7 @@ pmu_read(struct file *file, char __user *buf,
 
 	spin_lock_irqsave(&pp->lock, flags);
 	add_wait_queue(&pp->wait, &wait);
-	current->state = TASK_INTERRUPTIBLE;
+	set_current_state(TASK_INTERRUPTIBLE);
 
 	for (;;) {
 		ret = -EAGAIN;
@@ -2138,7 +2141,7 @@ pmu_read(struct file *file, char __user *buf,
 		schedule();
 		spin_lock_irqsave(&pp->lock, flags);
 	}
-	current->state = TASK_RUNNING;
+	__set_current_state(TASK_RUNNING);
 	remove_wait_queue(&pp->wait, &wait);
 	spin_unlock_irqrestore(&pp->lock, flags);
 	
diff --git a/drivers/net/ethernet/ibm/emac/core.c b/drivers/net/ethernet/ibm/emac/core.c
index 162762d1a12cb1..220bae6f5e4383 100644
--- a/drivers/net/ethernet/ibm/emac/core.c
+++ b/drivers/net/ethernet/ibm/emac/core.c
@@ -79,13 +79,6 @@ MODULE_AUTHOR
     ("Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>");
 MODULE_LICENSE("GPL");
 
-/*
- * PPC64 doesn't (yet) have a cacheable_memcpy
- */
-#ifdef CONFIG_PPC64
-#define cacheable_memcpy(d,s,n) memcpy((d),(s),(n))
-#endif
-
 /* minimum number of free TX descriptors required to wake up TX process */
 #define EMAC_TX_WAKEUP_THRESH		(NUM_TX_BUFF / 4)
 
@@ -1673,7 +1666,7 @@ static inline int emac_rx_sg_append(struct emac_instance *dev, int slot)
 			dev_kfree_skb(dev->rx_sg_skb);
 			dev->rx_sg_skb = NULL;
 		} else {
-			cacheable_memcpy(skb_tail_pointer(dev->rx_sg_skb),
+			memcpy(skb_tail_pointer(dev->rx_sg_skb),
 					 dev->rx_skb[slot]->data, len);
 			skb_put(dev->rx_sg_skb, len);
 			emac_recycle_rx_skb(dev, slot, len);
@@ -1730,8 +1723,7 @@ static int emac_poll_rx(void *param, int budget)
 				goto oom;
 
 			skb_reserve(copy_skb, EMAC_RX_SKB_HEADROOM + 2);
-			cacheable_memcpy(copy_skb->data - 2, skb->data - 2,
-					 len + 2);
+			memcpy(copy_skb->data - 2, skb->data - 2, len + 2);
 			emac_recycle_rx_skb(dev, slot, len);
 			skb = copy_skb;
 		} else if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC)))