diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index 051247027da0..4bd3a1bd02fc 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -219,18 +219,6 @@ KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
 # often slow when they are implemented at all
 KBUILD_CFLAGS		+= $(call cc-option,-mno-string)
 
-cpu-as-$(CONFIG_ALTIVEC)	+= $(call as-option,-Wa$(comma)-maltivec)
-
-# When using '-many -mpower4' gas will first try and find a matching power4
-# mnemonic and failing that it will allow any valid mnemonic that GAS knows
-# about. GCC will pass -many to GAS when assembling, clang does not.
-# LLVM IAS doesn't understand either flag: https://github.com/ClangBuiltLinux/linux/issues/675
-# but LLVM IAS only supports ISA >= 2.06 for Book3S 64 anyway...
-cpu-as-$(CONFIG_PPC_BOOK3S_64)	+= $(call as-option,-Wa$(comma)-mpower4) $(call as-option,-Wa$(comma)-many)
-
-KBUILD_AFLAGS += $(cpu-as-y)
-KBUILD_CFLAGS += $(cpu-as-y)
-
 KBUILD_AFLAGS += $(aflags-y)
 KBUILD_CFLAGS += $(cflags-y)
 
@@ -314,6 +302,26 @@ ppc32_allmodconfig:
 	$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \
 		-f $(srctree)/Makefile allmodconfig
 
+generated_configs += ppc40x_allmodconfig
+ppc40x_allmodconfig:
+	$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/40x.config \
+		-f $(srctree)/Makefile allmodconfig
+
+generated_configs += ppc44x_allmodconfig
+ppc44x_allmodconfig:
+	$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/44x.config \
+		-f $(srctree)/Makefile allmodconfig
+
+generated_configs += ppc8xx_allmodconfig
+ppc8xx_allmodconfig:
+	$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/8xx.config \
+		-f $(srctree)/Makefile allmodconfig
+
+generated_configs += ppc85xx_allmodconfig
+ppc85xx_allmodconfig:
+	$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-32bit.config \
+		-f $(srctree)/Makefile allmodconfig
+
 generated_configs += ppc_defconfig
 ppc_defconfig:
 	$(call merge_into_defconfig,book3s_32.config,)
diff --git a/arch/powerpc/boot/simple_alloc.c b/arch/powerpc/boot/simple_alloc.c
index 267d6524caac..d07796fdf91a 100644
--- a/arch/powerpc/boot/simple_alloc.c
+++ b/arch/powerpc/boot/simple_alloc.c
@@ -112,8 +112,11 @@ static void *simple_realloc(void *ptr, unsigned long size)
 		return ptr;
 
 	new = simple_malloc(size);
-	memcpy(new, ptr, p->size);
-	simple_free(ptr);
+	if (new) {
+		memcpy(new, ptr, p->size);
+		simple_free(ptr);
+	}
+
 	return new;
 }
 
diff --git a/arch/powerpc/configs/40x.config b/arch/powerpc/configs/40x.config
new file mode 100644
index 000000000000..82a9d58ddb81
--- /dev/null
+++ b/arch/powerpc/configs/40x.config
@@ -0,0 +1,2 @@
+CONFIG_PPC64=n
+CONFIG_40x=y
diff --git a/arch/powerpc/configs/44x.config b/arch/powerpc/configs/44x.config
new file mode 100644
index 000000000000..79b7b1962995
--- /dev/null
+++ b/arch/powerpc/configs/44x.config
@@ -0,0 +1,2 @@
+CONFIG_PPC64=n
+CONFIG_44x=y
diff --git a/arch/powerpc/configs/85xx-32bit.config b/arch/powerpc/configs/85xx-32bit.config
index 6b8894d727a2..a85310bcb1fd 100644
--- a/arch/powerpc/configs/85xx-32bit.config
+++ b/arch/powerpc/configs/85xx-32bit.config
@@ -1,3 +1,4 @@
+CONFIG_PPC64=n
 CONFIG_HIGHMEM=y
 CONFIG_KEXEC=y
 CONFIG_PPC_85xx=y
diff --git a/arch/powerpc/configs/8xx.config b/arch/powerpc/configs/8xx.config
new file mode 100644
index 000000000000..7eb3ffbbd667
--- /dev/null
+++ b/arch/powerpc/configs/8xx.config
@@ -0,0 +1,2 @@
+CONFIG_PPC64=n
+CONFIG_PPC_8xx=y
diff --git a/arch/powerpc/include/asm/machdep.h b/arch/powerpc/include/asm/machdep.h
index d31a5ec1550d..1862f94335ee 100644
--- a/arch/powerpc/include/asm/machdep.h
+++ b/arch/powerpc/include/asm/machdep.h
@@ -22,6 +22,7 @@ struct pci_host_bridge;
 struct machdep_calls {
 	const char	*name;
 	const char	*compatible;
+	const char * const *compatibles;
 #ifdef CONFIG_PPC64
 #ifdef CONFIG_PM
 	void		(*iommu_restore)(void);
diff --git a/arch/powerpc/include/asm/ppc_asm.h b/arch/powerpc/include/asm/ppc_asm.h
index 041ee2595520..1d1018c1e482 100644
--- a/arch/powerpc/include/asm/ppc_asm.h
+++ b/arch/powerpc/include/asm/ppc_asm.h
@@ -508,7 +508,25 @@ END_FTR_SECTION_NESTED(CPU_FTR_CELL_TB_BUG, CPU_FTR_CELL_TB_BUG, 96)
  */
 #define DCBT_BOOK3S_STOP_ALL_STREAM_IDS(scratch)	\
        lis     scratch,0x60000000@h;			\
-       dcbt    0,scratch,0b01010
+       .machine push;					\
+       .machine power4;					\
+       dcbt    0,scratch,0b01010;			\
+       .machine pop;
+
+#define DCBT_SETUP_STREAMS(from, from_parms, to, to_parms, scratch)	\
+	lis	scratch,0x8000;	/* GO=1 */				\
+	clrldi	scratch,scratch,32;					\
+	.machine push;							\
+	.machine power4;						\
+	/* setup read stream 0 */					\
+	dcbt	0,from,0b01000;		/* addr from */			\
+	dcbt	0,from_parms,0b01010;	/* length and depth from */	\
+	/* setup write stream 1 */					\
+	dcbtst	0,to,0b01000;		/* addr to */			\
+	dcbtst	0,to_parms,0b01010;	/* length and depth to */	\
+	eieio;								\
+	dcbt	0,scratch,0b01010;	/* all streams GO */		\
+	.machine pop;
 
 /*
  * toreal/fromreal/tophys/tovirt macros. 32-bit BookE makes them
diff --git a/arch/powerpc/include/asm/reg_fsl_emb.h b/arch/powerpc/include/asm/reg_fsl_emb.h
index a21f529c43d9..9893d2001b68 100644
--- a/arch/powerpc/include/asm/reg_fsl_emb.h
+++ b/arch/powerpc/include/asm/reg_fsl_emb.h
@@ -11,10 +11,27 @@
 
 #ifndef __ASSEMBLY__
 /* Performance Monitor Registers */
-#define mfpmr(rn)	({unsigned int rval; \
-			asm volatile("mfpmr %0," __stringify(rn) \
-				     : "=r" (rval)); rval;})
-#define mtpmr(rn, v)	asm volatile("mtpmr " __stringify(rn) ",%0" : : "r" (v))
+static __always_inline unsigned int mfpmr(unsigned int rn)
+{
+	unsigned int rval;
+
+	asm (".machine push; "
+	     ".machine e300; "
+	     "mfpmr %[rval], %[rn];"
+	     ".machine pop;"
+	     : [rval] "=r" (rval) : [rn] "i" (rn));
+
+	return rval;
+}
+
+static __always_inline void mtpmr(unsigned int rn, unsigned int val)
+{
+	asm (".machine push; "
+	     ".machine e300; "
+	     "mtpmr %[rn], %[val];"
+	     ".machine pop;"
+	     : [val] "=r" (val) : [rn] "i" (rn));
+}
 #endif /* __ASSEMBLY__ */
 
 /* Freescale Book E Performance Monitor APU Registers */
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 6f7d4edaa0bc..7504ceec5c58 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -284,15 +284,14 @@ static __always_inline void call_do_irq(struct pt_regs *regs, void *sp)
 void __do_IRQ(struct pt_regs *regs)
 {
 	struct pt_regs *old_regs = set_irq_regs(regs);
-	void *cursp, *irqsp, *sirqsp;
+	void *cursp, *irqsp;
 
 	/* Switch to the irq stack to handle this */
 	cursp = (void *)(current_stack_pointer & ~(THREAD_SIZE - 1));
 	irqsp = hardirq_ctx[raw_smp_processor_id()];
-	sirqsp = softirq_ctx[raw_smp_processor_id()];
 
 	/* Already there ? If not switch stack and call */
-	if (unlikely(cursp == irqsp || cursp == sirqsp))
+	if (unlikely(cursp == irqsp))
 		__do_irq(regs, current_stack_pointer);
 	else
 		call_do_irq(regs, irqsp);
diff --git a/arch/powerpc/kernel/secure_boot.c b/arch/powerpc/kernel/secure_boot.c
index f9af305d9579..9e0efb657f39 100644
--- a/arch/powerpc/kernel/secure_boot.c
+++ b/arch/powerpc/kernel/secure_boot.c
@@ -32,8 +32,10 @@ bool is_ppc_secureboot_enabled(void)
 	if (enabled)
 		goto out;
 
-	if (!of_property_read_u32(of_root, "ibm,secure-boot", &secureboot))
+	node = of_find_node_by_path("/");
+	if (!of_property_read_u32(node, "ibm,secure-boot", &secureboot))
 		enabled = (secureboot > 1);
+	of_node_put(node);
 
 out:
 	pr_info("Secure boot mode %s\n", enabled ? "enabled" : "disabled");
@@ -54,8 +56,10 @@ bool is_ppc_trustedboot_enabled(void)
 	if (enabled)
 		goto out;
 
-	if (!of_property_read_u32(of_root, "ibm,trusted-boot", &trustedboot))
+	node = of_find_node_by_path("/");
+	if (!of_property_read_u32(node, "ibm,trusted-boot", &trustedboot))
 		enabled = (trustedboot > 0);
+	of_node_put(node);
 
 out:
 	pr_info("Trusted boot mode %s\n", enabled ? "enabled" : "disabled");
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index 6fe68aa93268..0c41098bdc35 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -640,6 +640,8 @@ static __init void probe_machine(void)
 		DBG("  %s ...\n", machine_id->name);
 		if (machine_id->compatible && !of_machine_is_compatible(machine_id->compatible))
 			continue;
+		if (machine_id->compatibles && !of_machine_compatible_match(machine_id->compatibles))
+			continue;
 		memcpy(&ppc_md, machine_id, sizeof(struct machdep_calls));
 		if (ppc_md.probe && !ppc_md.probe())
 			continue;
diff --git a/arch/powerpc/kexec/ranges.c b/arch/powerpc/kexec/ranges.c
index fb3e12f15214..33b780049aaf 100644
--- a/arch/powerpc/kexec/ranges.c
+++ b/arch/powerpc/kexec/ranges.c
@@ -385,14 +385,16 @@ int add_opal_mem_range(struct crash_mem **mem_ranges)
 int add_reserved_mem_ranges(struct crash_mem **mem_ranges)
 {
 	int n_mem_addr_cells, n_mem_size_cells, i, len, cells, ret = 0;
+	struct device_node *root = of_find_node_by_path("/");
 	const __be32 *prop;
 
-	prop = of_get_property(of_root, "reserved-ranges", &len);
+	prop = of_get_property(root, "reserved-ranges", &len);
+	n_mem_addr_cells = of_n_addr_cells(root);
+	n_mem_size_cells = of_n_size_cells(root);
+	of_node_put(root);
 	if (!prop)
 		return 0;
 
-	n_mem_addr_cells = of_n_addr_cells(of_root);
-	n_mem_size_cells = of_n_size_cells(of_root);
 	cells = n_mem_addr_cells + n_mem_size_cells;
 
 	/* Each reserved range is an (address,size) pair */
diff --git a/arch/powerpc/kexec/relocate_32.S b/arch/powerpc/kexec/relocate_32.S
index d9f0dd9b34ff..104c9911f406 100644
--- a/arch/powerpc/kexec/relocate_32.S
+++ b/arch/powerpc/kexec/relocate_32.S
@@ -8,6 +8,7 @@
  * 		Author: Suzuki Poulose <suzuki@in.ibm.com>
  */
 
+#include <linux/objtool.h>
 #include <asm/reg.h>
 #include <asm/page.h>
 #include <asm/mmu.h>
@@ -349,6 +350,7 @@ write_utlb:
 	cmpwi	r10, PPC47x_TLB0_4K
 	bne	0f
 	li	r10, 0x1000			/* r10 = 4k */
+	ANNOTATE_INTRA_FUNCTION_CALL
 	bl	1f
 
 0:
diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
index 6eac63e79a89..0ab65eeb93ee 100644
--- a/arch/powerpc/lib/Makefile
+++ b/arch/powerpc/lib/Makefile
@@ -76,7 +76,7 @@ obj-$(CONFIG_PPC_LIB_RHEAP) += rheap.o
 obj-$(CONFIG_FTR_FIXUP_SELFTEST) += feature-fixups-test.o
 
 obj-$(CONFIG_ALTIVEC)	+= xor_vmx.o xor_vmx_glue.o
-CFLAGS_xor_vmx.o += -maltivec $(call cc-option,-mabi=altivec)
+CFLAGS_xor_vmx.o += -mhard-float -maltivec $(call cc-option,-mabi=altivec)
 # Enable <altivec.h>
 CFLAGS_xor_vmx.o += -isystem $(shell $(CC) -print-file-name=include)
 
diff --git a/arch/powerpc/lib/copypage_power7.S b/arch/powerpc/lib/copypage_power7.S
index a783973f1215..07e7cec4d135 100644
--- a/arch/powerpc/lib/copypage_power7.S
+++ b/arch/powerpc/lib/copypage_power7.S
@@ -27,17 +27,7 @@ _GLOBAL(copypage_power7)
 #endif
 	ori	r10,r7,1	/* stream=1 */
 
-	lis	r8,0x8000	/* GO=1 */
-	clrldi	r8,r8,32
-
-	/* setup read stream 0  */
-	dcbt	0,r4,0b01000  	/* addr from */
-	dcbt	0,r7,0b01010   /* length and depth from */
-	/* setup write stream 1 */
-	dcbtst	0,r9,0b01000   /* addr to */
-	dcbtst	0,r10,0b01010  /* length and depth to */
-	eieio
-	dcbt	0,r8,0b01010	/* all streams GO */
+	DCBT_SETUP_STREAMS(r4, r7, r9, r10, r8)
 
 #ifdef CONFIG_ALTIVEC
 	mflr	r0
diff --git a/arch/powerpc/lib/copyuser_power7.S b/arch/powerpc/lib/copyuser_power7.S
index ac41053c3a5a..8474c682a178 100644
--- a/arch/powerpc/lib/copyuser_power7.S
+++ b/arch/powerpc/lib/copyuser_power7.S
@@ -298,17 +298,7 @@ err1;	stb	r0,0(r3)
 	or	r7,r7,r0
 	ori	r10,r7,1	/* stream=1 */
 
-	lis	r8,0x8000	/* GO=1 */
-	clrldi	r8,r8,32
-
-	/* setup read stream 0 */
-	dcbt	0,r6,0b01000   /* addr from */
-	dcbt	0,r7,0b01010   /* length and depth from */
-	/* setup write stream 1 */
-	dcbtst	0,r9,0b01000   /* addr to */
-	dcbtst	0,r10,0b01010  /* length and depth to */
-	eieio
-	dcbt	0,r8,0b01010	/* all streams GO */
+	DCBT_SETUP_STREAMS(r6, r7, r9, r10, r8)
 
 	beq	cr1,.Lunwind_stack_nonvmx_copy
 
diff --git a/arch/powerpc/lib/memcpy_power7.S b/arch/powerpc/lib/memcpy_power7.S
index 9398b2b746c4..b7c5e7fca8b9 100644
--- a/arch/powerpc/lib/memcpy_power7.S
+++ b/arch/powerpc/lib/memcpy_power7.S
@@ -244,15 +244,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
 	or	r7,r7,r0
 	ori	r10,r7,1	/* stream=1 */
 
-	lis	r8,0x8000	/* GO=1 */
-	clrldi	r8,r8,32
-
-	dcbt	0,r6,0b01000
-	dcbt	0,r7,0b01010
-	dcbtst	0,r9,0b01000
-	dcbtst	0,r10,0b01010
-	eieio
-	dcbt	0,r8,0b01010	/* GO */
+	DCBT_SETUP_STREAMS(r6, r7, r9, r10, r8)
 
 	beq	cr1,.Lunwind_stack_nonvmx_copy
 
diff --git a/arch/powerpc/mm/book3s64/hash_hugepage.c b/arch/powerpc/mm/book3s64/hash_hugepage.c
index c0fabe6c5a12..15d6f3ea7178 100644
--- a/arch/powerpc/mm/book3s64/hash_hugepage.c
+++ b/arch/powerpc/mm/book3s64/hash_hugepage.c
@@ -59,16 +59,13 @@ int __hash_page_thp(unsigned long ea, unsigned long access, unsigned long vsid,
 
 	rflags = htab_convert_pte_flags(new_pmd, flags);
 
-#if 0
-	if (!cpu_has_feature(CPU_FTR_COHERENT_ICACHE)) {
+	/*
+	 * THPs are only supported on platforms that can do mixed page size
+	 * segments (MPSS) and all such platforms have coherent icache. Hence we
+	 * don't need to do lazy icache flush (hash_page_do_lazy_icache()) on
+	 * noexecute fault.
+	 */
 
-		/*
-		 * No CPU has hugepages but lacks no execute, so we
-		 * don't need to worry about that case
-		 */
-		rflags = hash_page_do_lazy_icache(rflags, __pte(old_pte), trap);
-	}
-#endif
 	/*
 	 * Find the slot index details for this ea, using base page size.
 	 */
diff --git a/arch/powerpc/mm/drmem.c b/arch/powerpc/mm/drmem.c
index fde7790277f7..c110ab8fa8a3 100644
--- a/arch/powerpc/mm/drmem.c
+++ b/arch/powerpc/mm/drmem.c
@@ -393,17 +393,17 @@ static const __be32 *of_get_usable_memory(struct device_node *dn)
 int walk_drmem_lmbs(struct device_node *dn, void *data,
 		    int (*func)(struct drmem_lmb *, const __be32 **, void *))
 {
+	struct device_node *root = of_find_node_by_path("/");
 	const __be32 *prop, *usm;
 	int ret = -ENODEV;
 
-	if (!of_root)
+	if (!root)
 		return ret;
 
 	/* Get the address & size cells */
-	of_node_get(of_root);
-	n_root_addr_cells = of_n_addr_cells(of_root);
-	n_root_size_cells = of_n_size_cells(of_root);
-	of_node_put(of_root);
+	n_root_addr_cells = of_n_addr_cells(root);
+	n_root_size_cells = of_n_size_cells(root);
+	of_node_put(root);
 
 	if (init_drmem_lmb_size(dn))
 		return ret;
diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index f6c4ace3b221..a490724e84ad 100644
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c
@@ -1111,7 +1111,7 @@ static void __init setup_node_data(int nid, u64 start_pfn, u64 end_pfn)
 
 static void __init find_possible_nodes(void)
 {
-	struct device_node *rtas;
+	struct device_node *rtas, *root;
 	const __be32 *domains = NULL;
 	int prop_length, max_nodes;
 	u32 i;
@@ -1132,10 +1132,12 @@ static void __init find_possible_nodes(void)
 	 * If the LPAR is migratable, new nodes might be activated after a LPM,
 	 * so we should consider the max number in that case.
 	 */
-	if (!of_get_property(of_root, "ibm,migratable-partition", NULL))
+	root = of_find_node_by_path("/");
+	if (!of_get_property(root, "ibm,migratable-partition", NULL))
 		domains = of_get_property(rtas,
 					  "ibm,current-associativity-domains",
 					  &prop_length);
+	of_node_put(root);
 	if (!domains) {
 		domains = of_get_property(rtas, "ibm,max-associativity-domains",
 					&prop_length);
diff --git a/arch/powerpc/perf/hv-gpci.c b/arch/powerpc/perf/hv-gpci.c
index 27f18119fda1..241551d1282f 100644
--- a/arch/powerpc/perf/hv-gpci.c
+++ b/arch/powerpc/perf/hv-gpci.c
@@ -695,6 +695,20 @@ static unsigned long single_gpci_request(u32 req, u32 starting_index,
 
 	ret = plpar_hcall_norets(H_GET_PERF_COUNTER_INFO,
 			virt_to_phys(arg), HGPCI_REQ_BUFFER_SIZE);
+
+	/*
+	 * ret value as 'H_PARAMETER' with detail_rc as 'GEN_BUF_TOO_SMALL',
+	 * specifies that the current buffer size cannot accommodate
+	 * all the information and a partial buffer returned.
+	 * Since in this function we are only accessing data for a given starting index,
+	 * we don't need to accommodate whole data and can get required count by
+	 * accessing first entry data.
+	 * Hence hcall fails only incase the ret value is other than H_SUCCESS or
+	 * H_PARAMETER with detail_rc value as GEN_BUF_TOO_SMALL(0x1B).
+	 */
+	if (ret == H_PARAMETER && be32_to_cpu(arg->params.detail_rc) == 0x1B)
+		ret = 0;
+
 	if (ret) {
 		pr_devel("hcall failed: 0x%lx\n", ret);
 		goto out;
@@ -759,6 +773,7 @@ static int h_gpci_event_init(struct perf_event *event)
 {
 	u64 count;
 	u8 length;
+	unsigned long ret;
 
 	/* Not our event */
 	if (event->attr.type != event->pmu->type)
@@ -789,13 +804,23 @@ static int h_gpci_event_init(struct perf_event *event)
 	}
 
 	/* check if the request works... */
-	if (single_gpci_request(event_get_request(event),
+	ret = single_gpci_request(event_get_request(event),
 				event_get_starting_index(event),
 				event_get_secondary_index(event),
 				event_get_counter_info_version(event),
 				event_get_offset(event),
 				length,
-				&count)) {
+				&count);
+
+	/*
+	 * ret value as H_AUTHORITY implies that partition is not permitted to retrieve
+	 * performance information, and required to set
+	 * "Enable Performance Information Collection" option.
+	 */
+	if (ret == H_AUTHORITY)
+		return -EPERM;
+
+	if (ret) {
 		pr_devel("gpci hcall failed\n");
 		return -EINVAL;
 	}
diff --git a/arch/powerpc/platforms/40x/ppc40x_simple.c b/arch/powerpc/platforms/40x/ppc40x_simple.c
index e454e9d2eff1..294ab2728588 100644
--- a/arch/powerpc/platforms/40x/ppc40x_simple.c
+++ b/arch/powerpc/platforms/40x/ppc40x_simple.c
@@ -59,16 +59,13 @@ static const char * const board[] __initconst = {
 
 static int __init ppc40x_probe(void)
 {
-	if (of_device_compatible_match(of_root, board)) {
-		pci_set_flags(PCI_REASSIGN_ALL_RSRC);
-		return 1;
-	}
-
-	return 0;
+	pci_set_flags(PCI_REASSIGN_ALL_RSRC);
+	return 1;
 }
 
 define_machine(ppc40x_simple) {
 	.name = "PowerPC 40x Platform",
+	.compatibles = board,
 	.probe = ppc40x_probe,
 	.progress = udbg_progress,
 	.init_IRQ = uic_init_tree,
diff --git a/arch/powerpc/platforms/44x/warp.c b/arch/powerpc/platforms/44x/warp.c
index bf0188dcb918..a5001d32f978 100644
--- a/arch/powerpc/platforms/44x/warp.c
+++ b/arch/powerpc/platforms/44x/warp.c
@@ -8,6 +8,7 @@
 #include <linux/err.h>
 #include <linux/init.h>
 #include <linux/of_platform.h>
+#include <linux/platform_device.h>
 #include <linux/kthread.h>
 #include <linux/leds.h>
 #include <linux/i2c.h>
diff --git a/arch/powerpc/platforms/512x/mpc512x_generic.c b/arch/powerpc/platforms/512x/mpc512x_generic.c
index 0d58ab257cd9..d4fa6c302ccf 100644
--- a/arch/powerpc/platforms/512x/mpc512x_generic.c
+++ b/arch/powerpc/platforms/512x/mpc512x_generic.c
@@ -32,9 +32,6 @@ static const char * const board[] __initconst = {
  */
 static int __init mpc512x_generic_probe(void)
 {
-	if (!of_device_compatible_match(of_root, board))
-		return 0;
-
 	mpc512x_init_early();
 
 	return 1;
@@ -42,6 +39,7 @@ static int __init mpc512x_generic_probe(void)
 
 define_machine(mpc512x_generic) {
 	.name			= "MPC512x generic",
+	.compatibles		= board,
 	.probe			= mpc512x_generic_probe,
 	.init			= mpc512x_init,
 	.setup_arch		= mpc512x_setup_arch,
diff --git a/arch/powerpc/platforms/52xx/efika.c b/arch/powerpc/platforms/52xx/efika.c
index aa82e6b437f3..37a67120f257 100644
--- a/arch/powerpc/platforms/52xx/efika.c
+++ b/arch/powerpc/platforms/52xx/efika.c
@@ -195,8 +195,10 @@ static void __init efika_setup_arch(void)
 
 static int __init efika_probe(void)
 {
-	const char *model = of_get_property(of_root, "model", NULL);
+	struct device_node *root = of_find_node_by_path("/");
+	const char *model = of_get_property(root, "model", NULL);
 
+	of_node_put(root);
 	if (model == NULL)
 		return 0;
 	if (strcmp(model, "EFIKA5K2"))
diff --git a/arch/powerpc/platforms/52xx/lite5200.c b/arch/powerpc/platforms/52xx/lite5200.c
index 0fd67b3ffc3e..0a161d82a3a8 100644
--- a/arch/powerpc/platforms/52xx/lite5200.c
+++ b/arch/powerpc/platforms/52xx/lite5200.c
@@ -172,17 +172,9 @@ static const char * const board[] __initconst = {
 	NULL,
 };
 
-/*
- * Called very early, MMU is off, device-tree isn't unflattened
- */
-static int __init lite5200_probe(void)
-{
-	return of_device_compatible_match(of_root, board);
-}
-
 define_machine(lite5200) {
 	.name 		= "lite5200",
-	.probe 		= lite5200_probe,
+	.compatibles	= board,
 	.setup_arch 	= lite5200_setup_arch,
 	.discover_phbs	= mpc52xx_setup_pci,
 	.init		= mpc52xx_declare_of_platform_devices,
diff --git a/arch/powerpc/platforms/52xx/mpc5200_simple.c b/arch/powerpc/platforms/52xx/mpc5200_simple.c
index f1e85e86f5e5..7e0e4c34a40b 100644
--- a/arch/powerpc/platforms/52xx/mpc5200_simple.c
+++ b/arch/powerpc/platforms/52xx/mpc5200_simple.c
@@ -59,17 +59,9 @@ static const char *board[] __initdata = {
 	NULL
 };
 
-/*
- * Called very early, MMU is off, device-tree isn't unflattened
- */
-static int __init mpc5200_simple_probe(void)
-{
-	return of_device_compatible_match(of_root, board);
-}
-
 define_machine(mpc5200_simple_platform) {
 	.name		= "mpc5200-simple-platform",
-	.probe		= mpc5200_simple_probe,
+	.compatibles	= board,
 	.setup_arch	= mpc5200_simple_setup_arch,
 	.discover_phbs	= mpc52xx_setup_pci,
 	.init		= mpc52xx_declare_of_platform_devices,
diff --git a/arch/powerpc/platforms/83xx/mpc830x_rdb.c b/arch/powerpc/platforms/83xx/mpc830x_rdb.c
index 534bb227480d..63b6d213726a 100644
--- a/arch/powerpc/platforms/83xx/mpc830x_rdb.c
+++ b/arch/powerpc/platforms/83xx/mpc830x_rdb.c
@@ -34,19 +34,11 @@ static const char *board[] __initdata = {
 	NULL
 };
 
-/*
- * Called very early, MMU is off, device-tree isn't unflattened
- */
-static int __init mpc830x_rdb_probe(void)
-{
-	return of_device_compatible_match(of_root, board);
-}
-
 machine_device_initcall(mpc830x_rdb, mpc83xx_declare_of_platform_devices);
 
 define_machine(mpc830x_rdb) {
 	.name			= "MPC830x RDB",
-	.probe			= mpc830x_rdb_probe,
+	.compatibles		= board,
 	.setup_arch		= mpc830x_rdb_setup_arch,
 	.discover_phbs		= mpc83xx_setup_pci,
 	.init_IRQ		= mpc83xx_ipic_init_IRQ,
diff --git a/arch/powerpc/platforms/83xx/mpc831x_rdb.c b/arch/powerpc/platforms/83xx/mpc831x_rdb.c
index 7b901ab3b864..5c39966762e4 100644
--- a/arch/powerpc/platforms/83xx/mpc831x_rdb.c
+++ b/arch/powerpc/platforms/83xx/mpc831x_rdb.c
@@ -34,19 +34,11 @@ static const char *board[] __initdata = {
 	NULL
 };
 
-/*
- * Called very early, MMU is off, device-tree isn't unflattened
- */
-static int __init mpc831x_rdb_probe(void)
-{
-	return of_device_compatible_match(of_root, board);
-}
-
 machine_device_initcall(mpc831x_rdb, mpc83xx_declare_of_platform_devices);
 
 define_machine(mpc831x_rdb) {
 	.name			= "MPC831x RDB",
-	.probe			= mpc831x_rdb_probe,
+	.compatibles		= board,
 	.setup_arch		= mpc831x_rdb_setup_arch,
 	.discover_phbs		= mpc83xx_setup_pci,
 	.init_IRQ		= mpc83xx_ipic_init_IRQ,
diff --git a/arch/powerpc/platforms/83xx/mpc837x_rdb.c b/arch/powerpc/platforms/83xx/mpc837x_rdb.c
index 39e78018dd0b..45823e147933 100644
--- a/arch/powerpc/platforms/83xx/mpc837x_rdb.c
+++ b/arch/powerpc/platforms/83xx/mpc837x_rdb.c
@@ -61,17 +61,9 @@ static const char * const board[] __initconst = {
 	NULL
 };
 
-/*
- * Called very early, MMU is off, device-tree isn't unflattened
- */
-static int __init mpc837x_rdb_probe(void)
-{
-	return of_device_compatible_match(of_root, board);
-}
-
 define_machine(mpc837x_rdb) {
 	.name			= "MPC837x RDB/WLAN",
-	.probe			= mpc837x_rdb_probe,
+	.compatibles		= board,
 	.setup_arch		= mpc837x_rdb_setup_arch,
 	.discover_phbs  	= mpc83xx_setup_pci,
 	.init_IRQ		= mpc83xx_ipic_init_IRQ,
diff --git a/arch/powerpc/platforms/85xx/bsc913x_qds.c b/arch/powerpc/platforms/85xx/bsc913x_qds.c
index 2eb62bff86d4..3ad8096fcf16 100644
--- a/arch/powerpc/platforms/85xx/bsc913x_qds.c
+++ b/arch/powerpc/platforms/85xx/bsc913x_qds.c
@@ -19,7 +19,7 @@
 #include "mpc85xx.h"
 #include "smp.h"
 
-void __init bsc913x_qds_pic_init(void)
+static void __init bsc913x_qds_pic_init(void)
 {
 	struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN |
 	  MPIC_SINGLE_DEST_CPU,
diff --git a/arch/powerpc/platforms/85xx/bsc913x_rdb.c b/arch/powerpc/platforms/85xx/bsc913x_rdb.c
index 161f006cb3bb..dcd358c28201 100644
--- a/arch/powerpc/platforms/85xx/bsc913x_rdb.c
+++ b/arch/powerpc/platforms/85xx/bsc913x_rdb.c
@@ -15,7 +15,7 @@
 
 #include "mpc85xx.h"
 
-void __init bsc913x_rdb_pic_init(void)
+static void __init bsc913x_rdb_pic_init(void)
 {
 	struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN |
 	  MPIC_SINGLE_DEST_CPU,
diff --git a/arch/powerpc/platforms/85xx/corenet_generic.c b/arch/powerpc/platforms/85xx/corenet_generic.c
index 645fcca77cde..c44400e95f55 100644
--- a/arch/powerpc/platforms/85xx/corenet_generic.c
+++ b/arch/powerpc/platforms/85xx/corenet_generic.c
@@ -149,7 +149,7 @@ static int __init corenet_generic_probe(void)
 	extern struct smp_ops_t smp_85xx_ops;
 #endif
 
-	if (of_device_compatible_match(of_root, boards))
+	if (of_machine_compatible_match(boards))
 		return 1;
 
 	/* Check if we're running under the Freescale hypervisor */
diff --git a/arch/powerpc/platforms/85xx/ge_imp3a.c b/arch/powerpc/platforms/85xx/ge_imp3a.c
index 9c3b44a1952e..477852f1a726 100644
--- a/arch/powerpc/platforms/85xx/ge_imp3a.c
+++ b/arch/powerpc/platforms/85xx/ge_imp3a.c
@@ -38,7 +38,7 @@
 
 void __iomem *imp3a_regs;
 
-void __init ge_imp3a_pic_init(void)
+static void __init ge_imp3a_pic_init(void)
 {
 	struct mpic *mpic;
 	struct device_node *np;
diff --git a/arch/powerpc/platforms/85xx/tqm85xx.c b/arch/powerpc/platforms/85xx/tqm85xx.c
index 6be1b9809db6..f74d446c53f0 100644
--- a/arch/powerpc/platforms/85xx/tqm85xx.c
+++ b/arch/powerpc/platforms/85xx/tqm85xx.c
@@ -112,17 +112,9 @@ static const char * const board[] __initconst = {
 	NULL
 };
 
-/*
- * Called very early, device-tree isn't unflattened
- */
-static int __init tqm85xx_probe(void)
-{
-	return of_device_compatible_match(of_root, board);
-}
-
 define_machine(tqm85xx) {
 	.name			= "TQM85xx",
-	.probe			= tqm85xx_probe,
+	.compatibles		= board,
 	.setup_arch		= tqm85xx_setup_arch,
 	.init_IRQ		= tqm85xx_pic_init,
 	.show_cpuinfo		= tqm85xx_show_cpuinfo,
diff --git a/arch/powerpc/platforms/amigaone/setup.c b/arch/powerpc/platforms/amigaone/setup.c
index 6c6e714a7521..2c8dc0886912 100644
--- a/arch/powerpc/platforms/amigaone/setup.c
+++ b/arch/powerpc/platforms/amigaone/setup.c
@@ -25,7 +25,7 @@
 
 extern void __flush_disable_L1(void);
 
-void amigaone_show_cpuinfo(struct seq_file *m)
+static void amigaone_show_cpuinfo(struct seq_file *m)
 {
 	seq_printf(m, "vendor\t\t: Eyetech Ltd.\n");
 }
@@ -65,7 +65,7 @@ static int __init amigaone_add_bridge(struct device_node *dev)
 	return 0;
 }
 
-void __init amigaone_setup_arch(void)
+static void __init amigaone_setup_arch(void)
 {
 	if (ppc_md.progress)
 		ppc_md.progress("Linux/PPC "UTS_RELEASE"\n", 0);
@@ -83,7 +83,7 @@ static void __init amigaone_discover_phbs(void)
 	BUG_ON(phb != 0);
 }
 
-void __init amigaone_init_IRQ(void)
+static void __init amigaone_init_IRQ(void)
 {
 	struct device_node *pic, *np = NULL;
 	const unsigned long *prop = NULL;
@@ -123,7 +123,7 @@ static int __init request_isa_regions(void)
 }
 machine_device_initcall(amigaone, request_isa_regions);
 
-void __noreturn amigaone_restart(char *cmd)
+static void __noreturn amigaone_restart(char *cmd)
 {
 	local_irq_disable();
 
diff --git a/arch/powerpc/platforms/embedded6xx/linkstation.c b/arch/powerpc/platforms/embedded6xx/linkstation.c
index 9c10aac40c7b..e265f026eee2 100644
--- a/arch/powerpc/platforms/embedded6xx/linkstation.c
+++ b/arch/powerpc/platforms/embedded6xx/linkstation.c
@@ -99,9 +99,6 @@ static void __init linkstation_init_IRQ(void)
 	mpic_init(mpic);
 }
 
-extern void avr_uart_configure(void);
-extern void avr_uart_send(const char);
-
 static void __noreturn linkstation_restart(char *cmd)
 {
 	local_irq_disable();
diff --git a/arch/powerpc/platforms/embedded6xx/mpc10x.h b/arch/powerpc/platforms/embedded6xx/mpc10x.h
index 5ad12023e562..ebc258fa4858 100644
--- a/arch/powerpc/platforms/embedded6xx/mpc10x.h
+++ b/arch/powerpc/platforms/embedded6xx/mpc10x.h
@@ -156,4 +156,7 @@ int mpc10x_disable_store_gathering(struct pci_controller *hose);
 /* For MPC107 boards that use the built-in openpic */
 void mpc10x_set_openpic(void);
 
+void avr_uart_configure(void);
+void avr_uart_send(const char c);
+
 #endif	/* __PPC_KERNEL_MPC10X_H */
diff --git a/arch/powerpc/platforms/pasemi/pci.c b/arch/powerpc/platforms/pasemi/pci.c
index f27d31414737..60f990a336c4 100644
--- a/arch/powerpc/platforms/pasemi/pci.c
+++ b/arch/powerpc/platforms/pasemi/pci.c
@@ -270,16 +270,18 @@ static int __init pas_add_bridge(struct device_node *dev)
 
 void __init pas_pci_init(void)
 {
+	struct device_node *root = of_find_node_by_path("/");
 	struct device_node *np;
 	int res;
 
 	pci_set_flags(PCI_SCAN_ALL_PCIE_DEVS);
 
-	np = of_find_compatible_node(of_root, NULL, "pasemi,rootbus");
+	np = of_find_compatible_node(root, NULL, "pasemi,rootbus");
 	if (np) {
 		res = pas_add_bridge(np);
 		of_node_put(np);
 	}
+	of_node_put(root);
 }
 
 void __iomem *__init pasemi_pci_getcfgaddr(struct pci_dev *dev, int offset)
diff --git a/arch/powerpc/platforms/pseries/lparcfg.c b/arch/powerpc/platforms/pseries/lparcfg.c
index 1c151d77e74b..f73c4d1c26af 100644
--- a/arch/powerpc/platforms/pseries/lparcfg.c
+++ b/arch/powerpc/platforms/pseries/lparcfg.c
@@ -346,9 +346,13 @@ static int read_rtas_lpar_name(struct seq_file *m)
  */
 static int read_dt_lpar_name(struct seq_file *m)
 {
+	struct device_node *root = of_find_node_by_path("/");
 	const char *name;
+	int ret;
 
-	if (of_property_read_string(of_root, "ibm,partition-name", &name))
+	ret = of_property_read_string(root, "ibm,partition-name", &name);
+	of_node_put(root);
+	if (ret)
 		return -ENOENT;
 
 	seq_printf(m, "partition_name=%s\n", name);
diff --git a/arch/powerpc/platforms/pseries/papr_platform_attributes.c b/arch/powerpc/platforms/pseries/papr_platform_attributes.c
index 526c621b098b..eea2041b270b 100644
--- a/arch/powerpc/platforms/pseries/papr_platform_attributes.c
+++ b/arch/powerpc/platforms/pseries/papr_platform_attributes.c
@@ -101,10 +101,12 @@ static int papr_get_attr(u64 id, struct energy_scale_attribute *esi)
 		esi_buf_size = ESI_HDR_SIZE + (CURR_MAX_ESI_ATTRS * max_esi_attrs);
 
 		temp_buf = krealloc(buf, esi_buf_size, GFP_KERNEL);
-		if (temp_buf)
+		if (temp_buf) {
 			buf = temp_buf;
-		else
-			return -ENOMEM;
+		} else {
+			ret = -ENOMEM;
+			goto out_buf;
+		}
 
 		goto retry;
 	}
diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index ecea85c74c43..284a6fa04b0c 100644
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -1029,9 +1029,11 @@ static void __init pseries_add_hw_description(void)
 		return;
 	}
 
-	if (of_property_read_bool(of_root, "ibm,powervm-partition") ||
-	    of_property_read_bool(of_root, "ibm,fw-net-version"))
+	dn = of_find_node_by_path("/");
+	if (of_property_read_bool(dn, "ibm,powervm-partition") ||
+	    of_property_read_bool(dn, "ibm,fw-net-version"))
 		seq_buf_printf(&ppc_hw_desc, "hv:phyp ");
+	of_node_put(dn);
 }
 
 /*
@@ -1091,7 +1093,11 @@ static void pseries_power_off(void)
 
 static int __init pSeries_probe(void)
 {
-	if (!of_node_is_type(of_root, "chrp"))
+	struct device_node *root = of_find_node_by_path("/");
+	bool ret = of_node_is_type(root, "chrp");
+
+	of_node_put(root);
+	if (!ret)
 		return 0;
 
 	/* Cell blades firmware claims to be chrp while it's not. Until this
diff --git a/drivers/macintosh/adb.c b/drivers/macintosh/adb.c
index 057b0221f695..b0407c5fadb2 100644
--- a/drivers/macintosh/adb.c
+++ b/drivers/macintosh/adb.c
@@ -74,7 +74,9 @@ static struct adb_driver *adb_driver_list[] = {
 	NULL
 };
 
-static struct class *adb_dev_class;
+static const struct class adb_dev_class = {
+	.name = "adb",
+};
 
 static struct adb_driver *adb_controller;
 BLOCKING_NOTIFIER_HEAD(adb_client_list);
@@ -888,10 +890,10 @@ adbdev_init(void)
 		return;
 	}
 
-	adb_dev_class = class_create("adb");
-	if (IS_ERR(adb_dev_class))
+	if (class_register(&adb_dev_class))
 		return;
-	device_create(adb_dev_class, NULL, MKDEV(ADB_MAJOR, 0), NULL, "adb");
+
+	device_create(&adb_dev_class, NULL, MKDEV(ADB_MAJOR, 0), NULL, "adb");
 
 	platform_device_register(&adb_pfdev);
 	platform_driver_probe(&adb_pfdrv, adb_dummy_probe);
diff --git a/drivers/of/base.c b/drivers/of/base.c
index b0ad8fc06e80..df8d9733b054 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -395,25 +395,26 @@ int of_device_compatible_match(const struct device_node *device,
 EXPORT_SYMBOL_GPL(of_device_compatible_match);
 
 /**
- * of_machine_is_compatible - Test root of device tree for a given compatible value
- * @compat: compatible string to look for in root node's compatible property.
+ * of_machine_compatible_match - Test root of device tree against a compatible array
+ * @compats: NULL terminated array of compatible strings to look for in root node's compatible property.
  *
- * Return: A positive integer if the root node has the given value in its
+ * Returns true if the root node has any of the given compatible values in its
  * compatible property.
  */
-int of_machine_is_compatible(const char *compat)
+bool of_machine_compatible_match(const char *const *compats)
 {
 	struct device_node *root;
 	int rc = 0;
 
 	root = of_find_node_by_path("/");
 	if (root) {
-		rc = of_device_is_compatible(root, compat);
+		rc = of_device_compatible_match(root, compats);
 		of_node_put(root);
 	}
-	return rc;
+
+	return rc != 0;
 }
-EXPORT_SYMBOL(of_machine_is_compatible);
+EXPORT_SYMBOL(of_machine_compatible_match);
 
 /**
  *  __of_device_is_available - check if a device is available for use
diff --git a/include/linux/of.h b/include/linux/of.h
index 6a9ddf20e79a..03ed4e37ca57 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -402,7 +402,20 @@ extern void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align));
 extern int of_alias_get_id(struct device_node *np, const char *stem);
 extern int of_alias_get_highest_id(const char *stem);
 
-extern int of_machine_is_compatible(const char *compat);
+bool of_machine_compatible_match(const char *const *compats);
+
+/**
+ * of_machine_is_compatible - Test root of device tree for a given compatible value
+ * @compat: compatible string to look for in root node's compatible property.
+ *
+ * Return: true if the root node has the given value in its compatible property.
+ */
+static inline bool of_machine_is_compatible(const char *compat)
+{
+	const char *compats[] = { compat, NULL };
+
+	return of_machine_compatible_match(compats);
+}
 
 extern int of_add_property(struct device_node *np, struct property *prop);
 extern int of_remove_property(struct device_node *np, struct property *prop);
@@ -808,6 +821,11 @@ static inline int of_remove_property(struct device_node *np, struct property *pr
 	return 0;
 }
 
+static inline bool of_machine_compatible_match(const char *const *compats)
+{
+	return false;
+}
+
 static inline bool of_console_check(const struct device_node *dn, const char *name, int index)
 {
 	return false;
diff --git a/tools/testing/selftests/powerpc/copyloops/asm/ppc_asm.h b/tools/testing/selftests/powerpc/copyloops/asm/ppc_asm.h
index a89f1fbf86ec..1d293ab77185 100644
--- a/tools/testing/selftests/powerpc/copyloops/asm/ppc_asm.h
+++ b/tools/testing/selftests/powerpc/copyloops/asm/ppc_asm.h
@@ -47,4 +47,16 @@
 /* Default to taking the first of any alternative feature sections */
 test_feature = 1
 
+#define DCBT_SETUP_STREAMS(from, from_parms, to, to_parms, scratch)	\
+	lis	scratch,0x8000;	/* GO=1 */				\
+	clrldi	scratch,scratch,32;					\
+	/* setup read stream 0 */					\
+	dcbt	0,from,0b01000;		/* addr from */			\
+	dcbt	0,from_parms,0b01010;	/* length and depth from */	\
+	/* setup write stream 1 */					\
+	dcbtst	0,to,0b01000;		/* addr to */			\
+	dcbtst	0,to_parms,0b01010;	/* length and depth to */	\
+	eieio;								\
+	dcbt	0,scratch,0b01010;	/* all streams GO */
+
 #endif /* __SELFTESTS_POWERPC_PPC_ASM_H */