4.14.48-stable review

@@ -643,9 +643,8 @@ static void free_ioctx_users(struct perc
 	while (!list_empty(&ctx->active_reqs)) {
 		req = list_first_entry(&ctx->active_reqs,
 				       struct aio_kiocb, ki_list);
-
-		list_del_init(&req->ki_list);
 		kiocb_cancel(req);
+		list_del_init(&req->ki_list);
 	}
 
 	spin_unlock_irq(&ctx->ctx_lock);

@@ -1451,7 +1451,7 @@ int __isolate_lru_page(struct page *page
 				return ret;
 
 			mapping = page_mapping(page);
-			migrate_dirty = mapping && mapping->a_ops->migratepage;
+			migrate_dirty = !mapping || mapping->a_ops->migratepage;
 			unlock_page(page);
 			if (!migrate_dirty)
 				return ret;

@@ -59,6 +59,31 @@ static struct instruction *next_insn_sam
 	return next;
 }
 
+static struct instruction *next_insn_same_func(struct objtool_file *file,
+					       struct instruction *insn)
+{
+	struct instruction *next = list_next_entry(insn, list);
+	struct symbol *func = insn->func;
+
+	if (!func)
+		return NULL;
+
+	if (&next->list != &file->insn_list && next->func == func)
+		return next;
+
+	/* Check if we're already in the subfunction: */
+	if (func == func->cfunc)
+		return NULL;
+
+	/* Move to the subfunction: */
+	return find_insn(file, func->cfunc->sec, func->cfunc->offset);
+}
+
+#define func_for_each_insn_all(file, func, insn)			\
+	for (insn = find_insn(file, func->sec, func->offset);		\
+	     insn;							\
+	     insn = next_insn_same_func(file, insn))
+
 #define func_for_each_insn(file, func, insn)				\
 	for (insn = find_insn(file, func->sec, func->offset);		\
 	     insn && &insn->list != &file->insn_list &&			\

@@ -148,10 +173,14 @@ static int __dead_end_function(struct ob
 			if (!strcmp(func->name, global_noreturns[i]))
 				return 1;
 
-	if (!func->sec)
+	if (!func->len)
+		return 0;
+
+	insn = find_insn(file, func->sec, func->offset);
+	if (!insn->func)
 		return 0;
 
-	func_for_each_insn(file, func, insn) {
+	func_for_each_insn_all(file, func, insn) {
 		empty = false;
 
 		if (insn->type == INSN_RETURN)

@@ -166,35 +195,24 @@ static int __dead_end_function(struct ob
 	 * case, the function's dead-end status depends on whether the target
 	 * of the sibling call returns.
 	 */
-	func_for_each_insn(file, func, insn) {
-		if (insn->sec != func->sec ||
-		    insn->offset >= func->offset + func->len)
-			break;
-
+	func_for_each_insn_all(file, func, insn) {
 		if (insn->type == INSN_JUMP_UNCONDITIONAL) {
 			struct instruction *dest = insn->jump_dest;
-			struct symbol *dest_func;
 
 			if (!dest)
 				/* sibling call to another file */
 				return 0;
 
-			if (dest->sec != func->sec ||
-			    dest->offset < func->offset ||
-			    dest->offset >= func->offset + func->len) {
-				/* local sibling call */
-				dest_func = find_symbol_by_offset(dest->sec,
-								  dest->offset);
-				if (!dest_func)
-					continue;
+			if (dest->func && dest->func->pfunc != insn->func->pfunc) {
 
+				/* local sibling call */
 				if (recursion == 5) {
 					WARN_FUNC("infinite recursion (objtool bug!)",
 						  dest->sec, dest->offset);
 					return -1;
 				}
 
-				return __dead_end_function(file, dest_func,
+				return __dead_end_function(file, dest->func,
 							   recursion + 1);
 			}
 		}

@@ -421,7 +439,7 @@ static void add_ignores(struct objtool_f
 			if (!ignore_func(file, func))
 				continue;
 
-			func_for_each_insn(file, func, insn)
+			func_for_each_insn_all(file, func, insn)
 				insn->ignore = true;
 		}
 	}

@@ -781,9 +799,8 @@ out:
 	return ret;
 }
 
-static int add_switch_table(struct objtool_file *file, struct symbol *func,
-			    struct instruction *insn, struct rela *table,
-			    struct rela *next_table)
+static int add_switch_table(struct objtool_file *file, struct instruction *insn,
+			    struct rela *table, struct rela *next_table)
 {
 	struct rela *rela = table;
 	struct instruction *alt_insn;

@@ -793,18 +810,13 @@ static int add_switch_table(struct objto
 		if (rela == next_table)
 			break;
 
-		if (rela->sym->sec != insn->sec ||
-		    rela->addend <= func->offset ||
-		    rela->addend >= func->offset + func->len)
+		alt_insn = find_insn(file, rela->sym->sec, rela->addend);
+		if (!alt_insn)
 			break;
 
-		alt_insn = find_insn(file, insn->sec, rela->addend);
-		if (!alt_insn) {
-			WARN("%s: can't find instruction at %s+0x%x",
-			     file->rodata->rela->name, insn->sec->name,
-			     rela->addend);
-			return -1;
-		}
+		/* Make sure the jmp dest is in the function or subfunction: */
+		if (alt_insn->func->pfunc != insn->func->pfunc)
+			break;
 
 		alt = malloc(sizeof(*alt));
 		if (!alt) {

@@ -942,7 +954,7 @@ static int add_func_switch_tables(struct
 	struct rela *rela, *prev_rela = NULL;
 	int ret;
 
-	func_for_each_insn(file, func, insn) {
+	func_for_each_insn_all(file, func, insn) {
 		if (!last)
 			last = insn;
 

@@ -973,8 +985,7 @@ static int add_func_switch_tables(struct
 		 * the beginning of another switch table in the same function.
 		 */
 		if (prev_jump) {
-			ret = add_switch_table(file, func, prev_jump, prev_rela,
-					       rela);
+			ret = add_switch_table(file, prev_jump, prev_rela, rela);
 			if (ret)
 				return ret;
 		}

@@ -984,7 +995,7 @@ static int add_func_switch_tables(struct
 	}
 
 	if (prev_jump) {
-		ret = add_switch_table(file, func, prev_jump, prev_rela, NULL);
+		ret = add_switch_table(file, prev_jump, prev_rela, NULL);
 		if (ret)
 			return ret;
 	}

@@ -1748,15 +1759,13 @@ static int validate_branch(struct objtoo
 	while (1) {
 		next_insn = next_insn_same_sec(file, insn);
 
-
-		if (file->c_file && func && insn->func && func != insn->func) {
+		if (file->c_file && func && insn->func && func != insn->func->pfunc) {
 			WARN("%s() falls through to next function %s()",
 			     func->name, insn->func->name);
 			return 1;
 		}
 
-		if (insn->func)
-			func = insn->func;
+		func = insn->func ? insn->func->pfunc : NULL;
 
 		if (func && insn->ignore) {
 			WARN_FUNC("BUG: why am I validating an ignored function?",

@@ -1777,7 +1786,7 @@ static int validate_branch(struct objtoo
 
 				i = insn;
 				save_insn = NULL;
-				func_for_each_insn_continue_reverse(file, func, i) {
+				func_for_each_insn_continue_reverse(file, insn->func, i) {
 					if (i->save) {
 						save_insn = i;
 						break;

@@ -1864,7 +1873,7 @@ static int validate_branch(struct objtoo
 		case INSN_JUMP_UNCONDITIONAL:
 			if (insn->jump_dest &&
 			    (!func || !insn->jump_dest->func ||
-			     func == insn->jump_dest->func)) {
+			     insn->jump_dest->func->pfunc == func)) {
 				ret = validate_branch(file, insn->jump_dest,
 						      state);
 				if (ret)

@@ -2059,7 +2068,7 @@ static int validate_functions(struct obj
 
 	for_each_sec(file, sec) {
 		list_for_each_entry(func, &sec->symbol_list, list) {
-			if (func->type != STT_FUNC)
+			if (func->type != STT_FUNC || func->pfunc != func)
 				continue;
 
 			insn = find_insn(file, sec, func->offset);

62 lines not on this page · raw message

@@ -61,6 +61,7 @@ struct symbol {
 	unsigned char bind, type;
 	unsigned long offset;
 	unsigned int len;
+	struct symbol *pfunc, *cfunc;
 };
 
 struct rela {

@@ -86,6 +87,7 @@ struct elf {
 struct elf *elf_open(const char *name, int flags);
 struct section *find_section_by_name(struct elf *elf, const char *name);
 struct symbol *find_symbol_by_offset(struct section *sec, unsigned long offset);
+struct symbol *find_symbol_by_name(struct elf *elf, const char *name);
 struct symbol *find_symbol_containing(struct section *sec, unsigned long offset);
 struct rela *find_rela_by_dest(struct section *sec, unsigned long offset);
 struct rela *find_rela_by_dest_range(struct section *sec, unsigned long offset,

@@ -805,17 +805,28 @@ static int add_switch_table(struct objto
 	struct rela *rela = table;
 	struct instruction *alt_insn;
 	struct alternative *alt;
+	struct symbol *pfunc = insn->func->pfunc;
+	unsigned int prev_offset = 0;
 
 	list_for_each_entry_from(rela, &file->rodata->rela->rela_list, list) {
 		if (rela == next_table)
 			break;
 
+		/* Make sure the switch table entries are consecutive: */
+		if (prev_offset && rela->offset != prev_offset + 8)
+			break;
+
+		/* Detect function pointers from contiguous objects: */
+		if (rela->sym->sec == pfunc->sec &&
+		    rela->addend == pfunc->offset)
+			break;
+
 		alt_insn = find_insn(file, rela->sym->sec, rela->addend);
 		if (!alt_insn)
 			break;
 
 		/* Make sure the jmp dest is in the function or subfunction: */
-		if (alt_insn->func->pfunc != insn->func->pfunc)
+		if (alt_insn->func->pfunc != pfunc)
 			break;
 
 		alt = malloc(sizeof(*alt));

@@ -826,6 +837,13 @@ static int add_switch_table(struct objto
 
 		alt->insn = alt_insn;
 		list_add_tail(&alt->list, &insn->alts);
+		prev_offset = rela->offset;
+	}
+
+	if (!prev_offset) {
+		WARN_FUNC("can't find switch jump table",
+			  insn->sec, insn->offset);
+		return -1;
 	}
 
 	return 0;

@@ -882,7 +900,9 @@ static struct rela *find_switch_table(st
 	struct instruction *orig_insn = insn;
 
 	text_rela = find_rela_by_dest_range(insn->sec, insn->offset, insn->len);
-	if (text_rela && text_rela->sym == file->rodata->sym) {
+	if (text_rela && text_rela->sym == file->rodata->sym &&
+	    !find_symbol_containing(file->rodata, text_rela->addend)) {
+
 		/* case 1 */
 		rodata_rela = find_rela_by_dest(file->rodata,
 						text_rela->addend);

@@ -898,24 +898,24 @@ static struct rela *find_switch_table(st
 {
 	struct rela *text_rela, *rodata_rela;
 	struct instruction *orig_insn = insn;
+	unsigned long table_offset;
 
+	/* case 1 & 2 */
 	text_rela = find_rela_by_dest_range(insn->sec, insn->offset, insn->len);
 	if (text_rela && text_rela->sym == file->rodata->sym &&
 	    !find_symbol_containing(file->rodata, text_rela->addend)) {
 
-		/* case 1 */
-		rodata_rela = find_rela_by_dest(file->rodata,
-						text_rela->addend);
-		if (rodata_rela)
-			return rodata_rela;
+		table_offset = text_rela->addend;
+		if (text_rela->type == R_X86_64_PC32) {
+			/* case 2 */
+			table_offset += 4;
+			file->ignore_unreachables = true;
+		}
 
-		/* case 2 */
-		rodata_rela = find_rela_by_dest(file->rodata,
-						text_rela->addend + 4);
+		rodata_rela = find_rela_by_dest(file->rodata, table_offset);
 		if (!rodata_rela)
 			return NULL;
 
-		file->ignore_unreachables = true;
 		return rodata_rela;
 	}
 

@@ -949,18 +949,21 @@ static struct rela *find_switch_table(st
 		if (!text_rela || text_rela->sym != file->rodata->sym)
 			continue;
 
+		table_offset = text_rela->addend;
+		if (text_rela->type == R_X86_64_PC32)
+			table_offset += 4;
+
 		/*
 		 * Make sure the .rodata address isn't associated with a
 		 * symbol.  gcc jump tables are anonymous data.
 		 */
-		if (find_symbol_containing(file->rodata, text_rela->addend))
+		if (find_symbol_containing(file->rodata, table_offset))
 			continue;
 
-		rodata_rela = find_rela_by_dest(file->rodata, text_rela->addend);
-		if (!rodata_rela)
-			continue;
-
-		return rodata_rela;
+		/* mov [rodata addr], %reg */
+		rodata_rela = find_rela_by_dest(file->rodata, table_offset);
+		if (rodata_rela)
+			return rodata_rela;
 	}
 
 	return NULL;

@@ -900,40 +900,19 @@ static struct rela *find_switch_table(st
 	struct instruction *orig_insn = insn;
 	unsigned long table_offset;
 
-	/* case 1 & 2 */
-	text_rela = find_rela_by_dest_range(insn->sec, insn->offset, insn->len);
-	if (text_rela && text_rela->sym == file->rodata->sym &&
-	    !find_symbol_containing(file->rodata, text_rela->addend)) {
-
-		table_offset = text_rela->addend;
-		if (text_rela->type == R_X86_64_PC32) {
-			/* case 2 */
-			table_offset += 4;
-			file->ignore_unreachables = true;
-		}
-
-		rodata_rela = find_rela_by_dest(file->rodata, table_offset);
-		if (!rodata_rela)
-			return NULL;
-
-		return rodata_rela;
-	}
-
-	/* case 3 */
 	/*
 	 * Backward search using the @first_jump_src links, these help avoid
 	 * much of the 'in between' code. Which avoids us getting confused by
 	 * it.
 	 */
-	for (insn = list_prev_entry(insn, list);
-
+	for (;
 	     &insn->list != &file->insn_list &&
 	     insn->sec == func->sec &&
 	     insn->offset >= func->offset;
 
 	     insn = insn->first_jump_src ?: list_prev_entry(insn, list)) {
 
-		if (insn->type == INSN_JUMP_DYNAMIC)
+		if (insn != orig_insn && insn->type == INSN_JUMP_DYNAMIC)
 			break;
 
 		/* allow small jumps within the range */

@@ -960,10 +939,18 @@ static struct rela *find_switch_table(st
 		if (find_symbol_containing(file->rodata, table_offset))
 			continue;
 
-		/* mov [rodata addr], %reg */
 		rodata_rela = find_rela_by_dest(file->rodata, table_offset);
-		if (rodata_rela)
+		if (rodata_rela) {
+			/*
+			 * Use of RIP-relative switch jumps is quite rare, and
+			 * indicates a rare GCC quirk/bug which can leave dead
+			 * code behind.
+			 */
+			if (text_rela->type == R_X86_64_PC32)
+				file->ignore_unreachables = true;
+
 			return rodata_rela;
+		}
 	}
 
 	return NULL;

@@ -207,9 +207,13 @@ static int __dead_end_function(struct ob
 
 				/* local sibling call */
 				if (recursion == 5) {
-					WARN_FUNC("infinite recursion (objtool bug!)",
-						  dest->sec, dest->offset);
-					return -1;
+					/*
+					 * Infinite recursion: two functions
+					 * have sibling calls to each other.
+					 * This is a very rare case.  It means
+					 * they aren't dead ends.
+					 */
+					return 0;
 				}
 
 				return __dead_end_function(file, dest->func,

@@ -429,6 +429,35 @@ static void deferred_error_interrupt_ena
 	wrmsr(MSR_CU_DEF_ERR, low, high);
 }
 
+static u32 smca_get_block_address(unsigned int cpu, unsigned int bank,
+				  unsigned int block)
+{
+	u32 low, high;
+	u32 addr = 0;
+
+	if (smca_get_bank_type(bank) == SMCA_RESERVED)
+		return addr;
+
+	if (!block)
+		return MSR_AMD64_SMCA_MCx_MISC(bank);
+
+	/*
+	 * For SMCA enabled processors, BLKPTR field of the first MISC register
+	 * (MCx_MISC0) indicates presence of additional MISC regs set (MISC1-4).
+	 */
+	if (rdmsr_safe_on_cpu(cpu, MSR_AMD64_SMCA_MCx_CONFIG(bank), &low, &high))
+		return addr;
+
+	if (!(low & MCI_CONFIG_MCAX))
+		return addr;
+
+	if (!rdmsr_safe_on_cpu(cpu, MSR_AMD64_SMCA_MCx_MISC(bank), &low, &high) &&
+	    (low & MASK_BLKPTR_LO))
+		return MSR_AMD64_SMCA_MCx_MISCy(bank, block - 1);
+
+	return addr;
+}
+
 static u32 get_block_address(unsigned int cpu, u32 current_addr, u32 low, u32 high,
 			     unsigned int bank, unsigned int block)
 {

@@ -449,32 +478,8 @@ static u32 get_block_address(unsigned in
 		}
 	}
 
-	if (mce_flags.smca) {
-		if (smca_get_bank_type(bank) == SMCA_RESERVED)
-			return addr;
-
-		if (!block) {
-			addr = MSR_AMD64_SMCA_MCx_MISC(bank);
-		} else {
-			/*
-			 * For SMCA enabled processors, BLKPTR field of the
-			 * first MISC register (MCx_MISC0) indicates presence of
-			 * additional MISC register set (MISC1-4).
-			 */
-			u32 low, high;
-
-			if (rdmsr_safe_on_cpu(cpu, MSR_AMD64_SMCA_MCx_CONFIG(bank), &low, &high))
-				return addr;
-
-			if (!(low & MCI_CONFIG_MCAX))
-				return addr;
-
-			if (!rdmsr_safe_on_cpu(cpu, MSR_AMD64_SMCA_MCx_MISC(bank), &low, &high) &&
-			    (low & MASK_BLKPTR_LO))
-				addr = MSR_AMD64_SMCA_MCx_MISCy(bank, block - 1);
-		}
-		return addr;
-	}
+	if (mce_flags.smca)
+		return smca_get_block_address(cpu, bank, block);
 
 	/* Fall back to method we used for older processors: */
 	switch (block) {

@@ -94,6 +94,11 @@ static struct smca_bank_name smca_names[
 	[SMCA_SMU]	= { "smu",		"System Management Unit" },
 };
 
+static u32 smca_bank_addrs[MAX_NR_BANKS][NR_BLOCKS] __ro_after_init =
+{
+	[0 ... MAX_NR_BANKS - 1] = { [0 ... NR_BLOCKS - 1] = -1 }
+};
+
 const char *smca_get_name(enum smca_bank_types t)
 {
 	if (t >= N_SMCA_BANK_TYPES)

@@ -441,20 +446,26 @@ static u32 smca_get_block_address(unsign
 	if (!block)
 		return MSR_AMD64_SMCA_MCx_MISC(bank);
 
+	/* Check our cache first: */
+	if (smca_bank_addrs[bank][block] != -1)
+		return smca_bank_addrs[bank][block];
+
 	/*
 	 * For SMCA enabled processors, BLKPTR field of the first MISC register
 	 * (MCx_MISC0) indicates presence of additional MISC regs set (MISC1-4).
 	 */
 	if (rdmsr_safe_on_cpu(cpu, MSR_AMD64_SMCA_MCx_CONFIG(bank), &low, &high))
-		return addr;
+		goto out;
 
 	if (!(low & MCI_CONFIG_MCAX))
-		return addr;
+		goto out;
 
 	if (!rdmsr_safe_on_cpu(cpu, MSR_AMD64_SMCA_MCx_MISC(bank), &low, &high) &&
 	    (low & MASK_BLKPTR_LO))
-		return MSR_AMD64_SMCA_MCx_MISCy(bank, block - 1);
+		addr = MSR_AMD64_SMCA_MCx_MISCy(bank, block - 1);
 
+out:
+	smca_bank_addrs[bank][block] = addr;
 	return addr;
 }
 

@@ -466,18 +477,6 @@ static u32 get_block_address(unsigned in
 	if ((bank >= mca_cfg.banks) || (block >= NR_BLOCKS))
 		return addr;
 
-	/* Get address from already initialized block. */
-	if (per_cpu(threshold_banks, cpu)) {
-		struct threshold_bank *bankp = per_cpu(threshold_banks, cpu)[bank];
-
-		if (bankp && bankp->blocks) {
-			struct threshold_block *blockp = &bankp->blocks[block];
-
-			if (blockp)
-				return blockp->address;
-		}
-	}
-
 	if (mce_flags.smca)
 		return smca_get_block_address(cpu, bank, block);
 

@@ -818,7 +818,7 @@ static int msm_gpio_init(struct msm_pinc
 		return -EINVAL;
 
 	chip = &pctrl->chip;
-	chip->base = -1;
+	chip->base = 0;
 	chip->ngpio = ngpio;
 	chip->label = dev_name(pctrl->dev);
 	chip->parent = pctrl->dev;

@@ -531,6 +531,8 @@ struct hv_pci_compl {
 	s32 completion_status;
 };
 
+static void hv_pci_onchannelcallback(void *context);
+
 /**
  * hv_pci_generic_compl() - Invoked for a completion packet
  * @context:		Set up by the sender of the packet.

@@ -675,6 +677,31 @@ static void _hv_pcifront_read_config(str
 	}
 }
 
+static u16 hv_pcifront_get_vendor_id(struct hv_pci_dev *hpdev)
+{
+	u16 ret;
+	unsigned long flags;
+	void __iomem *addr = hpdev->hbus->cfg_addr + CFG_PAGE_OFFSET +
+			     PCI_VENDOR_ID;
+
+	spin_lock_irqsave(&hpdev->hbus->config_lock, flags);
+
+	/* Choose the function to be read. (See comment above) */
+	writel(hpdev->desc.win_slot.slot, hpdev->hbus->cfg_addr);
+	/* Make sure the function was chosen before we start reading. */
+	mb();
+	/* Read from that function's config space. */
+	ret = readw(addr);
+	/*
+	 * mb() is not required here, because the spin_unlock_irqrestore()
+	 * is a barrier.
+	 */
+
+	spin_unlock_irqrestore(&hpdev->hbus->config_lock, flags);
+
+	return ret;
+}
+
 /**
  * _hv_pcifront_write_config() - Internal PCI config write
  * @hpdev:	The PCI driver's representation of the device

@@ -1121,8 +1148,37 @@ static void hv_compose_msi_msg(struct ir
 	 * Since this function is called with IRQ locks held, can't
 	 * do normal wait for completion; instead poll.
 	 */
-	while (!try_wait_for_completion(&comp.comp_pkt.host_event))
+	while (!try_wait_for_completion(&comp.comp_pkt.host_event)) {
+		/* 0xFFFF means an invalid PCI VENDOR ID. */
+		if (hv_pcifront_get_vendor_id(hpdev) == 0xFFFF) {
+			dev_err_once(&hbus->hdev->device,
+				     "the device has gone\n");
+			goto free_int_desc;
+		}
+
+		/*
+		 * When the higher level interrupt code calls us with
+		 * interrupt disabled, we must poll the channel by calling
+		 * the channel callback directly when channel->target_cpu is
+		 * the current CPU. When the higher level interrupt code
+		 * calls us with interrupt enabled, let's add the
+		 * local_bh_disable()/enable() to avoid race.
+		 */
+		local_bh_disable();
+
+		if (hbus->hdev->channel->target_cpu == smp_processor_id())
+			hv_pci_onchannelcallback(hbus);
+
+		local_bh_enable();
+
+		if (hpdev->state == hv_pcichild_ejecting) {
+			dev_err_once(&hbus->hdev->device,
+				     "the device is being ejected\n");
+			goto free_int_desc;
+		}
+
 		udelay(100);
+	}
 
 	if (comp.comp_pkt.completion_status < 0) {
 		dev_err(&hbus->hdev->device,

@@ -52,6 +52,23 @@ STATIC int xfs_alloc_ag_vextent_size(xfs
 STATIC int xfs_alloc_ag_vextent_small(xfs_alloc_arg_t *,
 		xfs_btree_cur_t *, xfs_agblock_t *, xfs_extlen_t *, int *);
 
+/*
+ * Size of the AGFL.  For CRC-enabled filesystes we steal a couple of slots in
+ * the beginning of the block for a proper header with the location information
+ * and CRC.
+ */
+unsigned int
+xfs_agfl_size(
+	struct xfs_mount	*mp)
+{
+	unsigned int		size = mp->m_sb.sb_sectsize;
+
+	if (xfs_sb_version_hascrc(&mp->m_sb))
+		size -= sizeof(struct xfs_agfl);
+
+	return size / sizeof(xfs_agblock_t);
+}
+
 unsigned int
 xfs_refc_block(
 	struct xfs_mount	*mp)

@@ -540,7 +557,7 @@ xfs_agfl_verify(
 	if (bp->b_pag && be32_to_cpu(agfl->agfl_seqno) != bp->b_pag->pag_agno)
 		return false;
 
-	for (i = 0; i < XFS_AGFL_SIZE(mp); i++) {
+	for (i = 0; i < xfs_agfl_size(mp); i++) {
 		if (be32_to_cpu(agfl->agfl_bno[i]) != NULLAGBLOCK &&
 		    be32_to_cpu(agfl->agfl_bno[i]) >= mp->m_sb.sb_agblocks)
 			return false;

@@ -2252,7 +2269,7 @@ xfs_alloc_get_freelist(
 	bno = be32_to_cpu(agfl_bno[be32_to_cpu(agf->agf_flfirst)]);
 	be32_add_cpu(&agf->agf_flfirst, 1);
 	xfs_trans_brelse(tp, agflbp);
-	if (be32_to_cpu(agf->agf_flfirst) == XFS_AGFL_SIZE(mp))
+	if (be32_to_cpu(agf->agf_flfirst) == xfs_agfl_size(mp))
 		agf->agf_flfirst = 0;
 
 	pag = xfs_perag_get(mp, be32_to_cpu(agf->agf_seqno));

@@ -2363,7 +2380,7 @@ xfs_alloc_put_freelist(
 			be32_to_cpu(agf->agf_seqno), &agflbp)))
 		return error;
 	be32_add_cpu(&agf->agf_fllast, 1);
-	if (be32_to_cpu(agf->agf_fllast) == XFS_AGFL_SIZE(mp))
+	if (be32_to_cpu(agf->agf_fllast) == xfs_agfl_size(mp))
 		agf->agf_fllast = 0;
 
 	pag = xfs_perag_get(mp, be32_to_cpu(agf->agf_seqno));

@@ -2381,7 +2398,7 @@ xfs_alloc_put_freelist(
 
 	xfs_alloc_log_agf(tp, agbp, logflags);
 
-	ASSERT(be32_to_cpu(agf->agf_flcount) <= XFS_AGFL_SIZE(mp));
+	ASSERT(be32_to_cpu(agf->agf_flcount) <= xfs_agfl_size(mp));
 
 	agfl_bno = XFS_BUF_TO_AGFL_BNO(mp, agflbp);
 	blockp = &agfl_bno[be32_to_cpu(agf->agf_fllast)];

@@ -2414,9 +2431,9 @@ xfs_agf_verify(
 	if (!(agf->agf_magicnum == cpu_to_be32(XFS_AGF_MAGIC) &&
 	      XFS_AGF_GOOD_VERSION(be32_to_cpu(agf->agf_versionnum)) &&
 	      be32_to_cpu(agf->agf_freeblks) <= be32_to_cpu(agf->agf_length) &&
-	      be32_to_cpu(agf->agf_flfirst) < XFS_AGFL_SIZE(mp) &&
-	      be32_to_cpu(agf->agf_fllast) < XFS_AGFL_SIZE(mp) &&
-	      be32_to_cpu(agf->agf_flcount) <= XFS_AGFL_SIZE(mp)))
+	      be32_to_cpu(agf->agf_flfirst) < xfs_agfl_size(mp) &&
+	      be32_to_cpu(agf->agf_fllast) < xfs_agfl_size(mp) &&
+	      be32_to_cpu(agf->agf_flcount) <= xfs_agfl_size(mp)))
 		return false;
 
 	if (be32_to_cpu(agf->agf_levels[XFS_BTNUM_BNO]) < 1 ||

@@ -26,6 +26,8 @@ struct xfs_trans;
 
 extern struct workqueue_struct *xfs_alloc_wq;
 
+unsigned int xfs_agfl_size(struct xfs_mount *mp);
+
 /*
  * Freespace allocation types.  Argument to xfs_alloc_[v]extent.
  */

@@ -798,24 +798,13 @@ typedef struct xfs_agi {
 		&(XFS_BUF_TO_AGFL(bp)->agfl_bno[0]) : \
 		(__be32 *)(bp)->b_addr)
 
-/*
- * Size of the AGFL.  For CRC-enabled filesystes we steal a couple of
- * slots in the beginning of the block for a proper header with the
- * location information and CRC.
- */
-#define XFS_AGFL_SIZE(mp) \
-	(((mp)->m_sb.sb_sectsize - \
-	 (xfs_sb_version_hascrc(&((mp)->m_sb)) ? \
-		sizeof(struct xfs_agfl) : 0)) / \
-	  sizeof(xfs_agblock_t))
-
 typedef struct xfs_agfl {
 	__be32		agfl_magicnum;
 	__be32		agfl_seqno;
 	uuid_t		agfl_uuid;
 	__be64		agfl_lsn;
 	__be32		agfl_crc;
-	__be32		agfl_bno[];	/* actually XFS_AGFL_SIZE(mp) */
+	__be32		agfl_bno[];	/* actually xfs_agfl_size(mp) */
 } __attribute__((packed)) xfs_agfl_t;
 
 #define XFS_AGFL_CRC_OFF	offsetof(struct xfs_agfl, agfl_crc)

@@ -294,7 +294,7 @@ xfs_growfs_data_private(
 		}
 
 		agfl_bno = XFS_BUF_TO_AGFL_BNO(mp, bp);
-		for (bucket = 0; bucket < XFS_AGFL_SIZE(mp); bucket++)
+		for (bucket = 0; bucket < xfs_agfl_size(mp); bucket++)
 			agfl_bno[bucket] = cpu_to_be32(NULLAGBLOCK);
 
 		error = xfs_bwrite(bp);

@@ -2057,6 +2057,93 @@ xfs_alloc_space_available(
 }
 
 /*
+ * Check the agfl fields of the agf for inconsistency or corruption. The purpose
+ * is to detect an agfl header padding mismatch between current and early v5
+ * kernels. This problem manifests as a 1-slot size difference between the
+ * on-disk flcount and the active [first, last] range of a wrapped agfl. This
+ * may also catch variants of agfl count corruption unrelated to padding. Either
+ * way, we'll reset the agfl and warn the user.
+ *
+ * Return true if a reset is required before the agfl can be used, false
+ * otherwise.
+ */
+static bool
+xfs_agfl_needs_reset(
+	struct xfs_mount	*mp,
+	struct xfs_agf		*agf)
+{
+	uint32_t		f = be32_to_cpu(agf->agf_flfirst);
+	uint32_t		l = be32_to_cpu(agf->agf_fllast);
+	uint32_t		c = be32_to_cpu(agf->agf_flcount);
+	int			agfl_size = xfs_agfl_size(mp);
+	int			active;
+
+	/* no agfl header on v4 supers */
+	if (!xfs_sb_version_hascrc(&mp->m_sb))
+		return false;
+
+	/*
+	 * The agf read verifier catches severe corruption of these fields.
+	 * Repeat some sanity checks to cover a packed -> unpacked mismatch if
+	 * the verifier allows it.
+	 */
+	if (f >= agfl_size || l >= agfl_size)
+		return true;
+	if (c > agfl_size)
+		return true;
+
+	/*
+	 * Check consistency between the on-disk count and the active range. An
+	 * agfl padding mismatch manifests as an inconsistent flcount.
+	 */
+	if (c && l >= f)
+		active = l - f + 1;
+	else if (c)
+		active = agfl_size - f + l + 1;
+	else
+		active = 0;
+
+	return active != c;
+}
+
+/*
+ * Reset the agfl to an empty state. Ignore/drop any existing blocks since the
+ * agfl content cannot be trusted. Warn the user that a repair is required to
+ * recover leaked blocks.
+ *
+ * The purpose of this mechanism is to handle filesystems affected by the agfl
+ * header padding mismatch problem. A reset keeps the filesystem online with a
+ * relatively minor free space accounting inconsistency rather than suffer the
+ * inevitable crash from use of an invalid agfl block.
+ */
+static void
+xfs_agfl_reset(
+	struct xfs_trans	*tp,
+	struct xfs_buf		*agbp,
+	struct xfs_perag	*pag)
+{
+	struct xfs_mount	*mp = tp->t_mountp;
+	struct xfs_agf		*agf = XFS_BUF_TO_AGF(agbp);
+
+	ASSERT(pag->pagf_agflreset);
+	trace_xfs_agfl_reset(mp, agf, 0, _RET_IP_);
+
+	xfs_warn(mp,
+	       "WARNING: Reset corrupted AGFL on AG %u. %d blocks leaked. "
+	       "Please unmount and run xfs_repair.",
+	         pag->pag_agno, pag->pagf_flcount);
+
+	agf->agf_flfirst = 0;
+	agf->agf_fllast = cpu_to_be32(xfs_agfl_size(mp) - 1);
+	agf->agf_flcount = 0;
+	xfs_alloc_log_agf(tp, agbp, XFS_AGF_FLFIRST | XFS_AGF_FLLAST |
+				    XFS_AGF_FLCOUNT);
+
+	pag->pagf_flcount = 0;
+	pag->pagf_agflreset = false;
+}
+
+/*
  * Decide whether to use this allocation group for this allocation.
  * If so, fix up the btree freelist's size.
  */

@@ -2117,6 +2204,10 @@ xfs_alloc_fix_freelist(
 		}
 	}
 
+	/* reset a padding mismatched agfl before final free space check */
+	if (pag->pagf_agflreset)
+		xfs_agfl_reset(tp, agbp, pag);
+
 	/* If there isn't enough total space or single-extent, reject it. */
 	need = xfs_alloc_min_freelist(mp, pag);
 	if (!xfs_alloc_space_available(args, need, flags))

@@ -2273,6 +2364,7 @@ xfs_alloc_get_freelist(
 		agf->agf_flfirst = 0;
 
 	pag = xfs_perag_get(mp, be32_to_cpu(agf->agf_seqno));
+	ASSERT(!pag->pagf_agflreset);
 	be32_add_cpu(&agf->agf_flcount, -1);
 	xfs_trans_agflist_delta(tp, -1);
 	pag->pagf_flcount--;

@@ -2384,6 +2476,7 @@ xfs_alloc_put_freelist(
 		agf->agf_fllast = 0;
 
 	pag = xfs_perag_get(mp, be32_to_cpu(agf->agf_seqno));
+	ASSERT(!pag->pagf_agflreset);
 	be32_add_cpu(&agf->agf_flcount, 1);
 	xfs_trans_agflist_delta(tp, 1);
 	pag->pagf_flcount++;

@@ -2589,6 +2682,7 @@ xfs_alloc_read_agf(
 		pag->pagb_count = 0;
 		pag->pagb_tree = RB_ROOT;
 		pag->pagf_init = 1;
+		pag->pagf_agflreset = xfs_agfl_needs_reset(mp, agf);
 	}
 #ifdef DEBUG
 	else if (!XFS_FORCED_SHUTDOWN(mp)) {

@@ -353,6 +353,7 @@ typedef struct xfs_perag {
 	char		pagi_inodeok;	/* The agi is ok for inodes */
 	uint8_t		pagf_levels[XFS_BTNUM_AGF];
 					/* # of levels in bno & cnt btree */
+	bool		pagf_agflreset; /* agfl requires reset before use */
 	uint32_t	pagf_flcount;	/* count of blocks in freelist */
 	xfs_extlen_t	pagf_freeblks;	/* total free blocks */
 	xfs_extlen_t	pagf_longest;	/* longest free space */

@@ -1513,7 +1513,7 @@ TRACE_EVENT(xfs_extent_busy_trim,
 		  __entry->tlen)
 );
 
-TRACE_EVENT(xfs_agf,
+DECLARE_EVENT_CLASS(xfs_agf_class,
 	TP_PROTO(struct xfs_mount *mp, struct xfs_agf *agf, int flags,
 		 unsigned long caller_ip),
 	TP_ARGS(mp, agf, flags, caller_ip),

@@ -1569,6 +1569,13 @@ TRACE_EVENT(xfs_agf,
 		  __entry->longest,
 		  (void *)__entry->caller_ip)
 );
+#define DEFINE_AGF_EVENT(name) \
+DEFINE_EVENT(xfs_agf_class, name, \
+	TP_PROTO(struct xfs_mount *mp, struct xfs_agf *agf, int flags, \
+		 unsigned long caller_ip), \
+	TP_ARGS(mp, agf, flags, caller_ip))
+DEFINE_AGF_EVENT(xfs_agf);
+DEFINE_AGF_EVENT(xfs_agfl_reset);
 
 TRACE_EVENT(xfs_free_extent,
 	TP_PROTO(struct xfs_mount *mp, xfs_agnumber_t agno, xfs_agblock_t agbno,

@@ -172,6 +172,7 @@ static const char * const smbus_pnp_ids[
 	"LEN0048", /* X1 Carbon 3 */
 	"LEN0046", /* X250 */
 	"LEN004a", /* W541 */
+	"LEN0072", /* X1 Carbon Gen 5 (2017) - Elan/ALPS trackpoint */
 	"LEN200f", /* T450s */
 	NULL
 };

@@ -173,6 +173,7 @@ static const char * const smbus_pnp_ids[
 	"LEN0046", /* X250 */
 	"LEN004a", /* W541 */
 	"LEN0072", /* X1 Carbon Gen 5 (2017) - Elan/ALPS trackpoint */
+	"LEN0073", /* X1 Carbon G5 (Elantech) */
 	"LEN200f", /* T450s */
 	NULL
 };

@@ -174,6 +174,8 @@ static const char * const smbus_pnp_ids[
 	"LEN004a", /* W541 */
 	"LEN0072", /* X1 Carbon Gen 5 (2017) - Elan/ALPS trackpoint */
 	"LEN0073", /* X1 Carbon G5 (Elantech) */
+	"LEN0092", /* X1 Carbon 6 */
+	"LEN0096", /* X280 */
 	"LEN200f", /* T450s */
 	NULL
 };

@@ -172,10 +172,12 @@ static const char * const smbus_pnp_ids[
 	"LEN0048", /* X1 Carbon 3 */
 	"LEN0046", /* X250 */
 	"LEN004a", /* W541 */
+	"LEN0071", /* T480 */
 	"LEN0072", /* X1 Carbon Gen 5 (2017) - Elan/ALPS trackpoint */
 	"LEN0073", /* X1 Carbon G5 (Elantech) */
 	"LEN0092", /* X1 Carbon 6 */
 	"LEN0096", /* X280 */
+	"LEN0097", /* X280 -> ALPS trackpoint */
 	"LEN200f", /* T450s */
 	NULL
 };

@@ -130,7 +130,7 @@ static int elan_smbus_get_baseline_data(
 					bool max_baseline, u8 *value)
 {
 	int error;
-	u8 val[3];
+	u8 val[I2C_SMBUS_BLOCK_MAX] = {0};
 
 	error = i2c_smbus_read_block_data(client,
 					  max_baseline ?

@@ -149,7 +149,7 @@ static int elan_smbus_get_version(struct
 				  bool iap, u8 *version)
 {
 	int error;
-	u8 val[3];
+	u8 val[I2C_SMBUS_BLOCK_MAX] = {0};
 
 	error = i2c_smbus_read_block_data(client,
 					  iap ? ETP_SMBUS_IAP_VERSION_CMD :

@@ -170,7 +170,7 @@ static int elan_smbus_get_sm_version(str
 				     u8 *clickpad)
 {
 	int error;
-	u8 val[3];
+	u8 val[I2C_SMBUS_BLOCK_MAX] = {0};
 
 	error = i2c_smbus_read_block_data(client,
 					  ETP_SMBUS_SM_VERSION_CMD, val);

@@ -188,7 +188,7 @@ static int elan_smbus_get_sm_version(str
 static int elan_smbus_get_product_id(struct i2c_client *client, u16 *id)
 {
 	int error;
-	u8 val[3];
+	u8 val[I2C_SMBUS_BLOCK_MAX] = {0};
 
 	error = i2c_smbus_read_block_data(client,
 					  ETP_SMBUS_UNIQUEID_CMD, val);

@@ -205,7 +205,7 @@ static int elan_smbus_get_checksum(struc
 				   bool iap, u16 *csum)
 {
 	int error;
-	u8 val[3];
+	u8 val[I2C_SMBUS_BLOCK_MAX] = {0};
 
 	error = i2c_smbus_read_block_data(client,
 					  iap ? ETP_SMBUS_FW_CHECKSUM_CMD :

@@ -226,7 +226,7 @@ static int elan_smbus_get_max(struct i2c
 {
 	int ret;
 	int error;
-	u8 val[3];
+	u8 val[I2C_SMBUS_BLOCK_MAX] = {0};
 
 	ret = i2c_smbus_read_block_data(client, ETP_SMBUS_RANGE_CMD, val);
 	if (ret != 3) {

@@ -246,7 +246,7 @@ static int elan_smbus_get_resolution(str
 {
 	int ret;
 	int error;
-	u8 val[3];
+	u8 val[I2C_SMBUS_BLOCK_MAX] = {0};
 
 	ret = i2c_smbus_read_block_data(client, ETP_SMBUS_RESOLUTION_CMD, val);
 	if (ret != 3) {

@@ -267,7 +267,7 @@ static int elan_smbus_get_num_traces(str
 {
 	int ret;
 	int error;
-	u8 val[3];
+	u8 val[I2C_SMBUS_BLOCK_MAX] = {0};
 
 	ret = i2c_smbus_read_block_data(client, ETP_SMBUS_XY_TRACENUM_CMD, val);
 	if (ret != 3) {

@@ -294,7 +294,7 @@ static int elan_smbus_iap_get_mode(struc
 {
 	int error;
 	u16 constant;
-	u8 val[3];
+	u8 val[I2C_SMBUS_BLOCK_MAX] = {0};
 
 	error = i2c_smbus_read_block_data(client, ETP_SMBUS_IAP_CTRL_CMD, val);
 	if (error < 0) {

@@ -345,7 +345,7 @@ static int elan_smbus_prepare_fw_update(
 	int len;
 	int error;
 	enum tp_mode mode;
-	u8 val[3];
+	u8 val[I2C_SMBUS_BLOCK_MAX] = {0};
 	u8 cmd[4] = {0x0F, 0x78, 0x00, 0x06};
 	u16 password;
 

@@ -419,7 +419,7 @@ static int elan_smbus_write_fw_block(str
 	struct device *dev = &client->dev;
 	int error;
 	u16 result;
-	u8 val[3];
+	u8 val[I2C_SMBUS_BLOCK_MAX] = {0};
 
 	/*
 	 * Due to the limitation of smbus protocol limiting

@@ -482,9 +482,10 @@ clear_event_triggers(struct trace_array
 	struct trace_event_file *file;
 
 	list_for_each_entry(file, &tr->events, list) {
-		struct event_trigger_data *data;
-		list_for_each_entry_rcu(data, &file->triggers, list) {
+		struct event_trigger_data *data, *n;
+		list_for_each_entry_safe(data, n, &file->triggers, list) {
 			trace_event_trigger_enable_disable(file, 0);
+			list_del_rcu(&data->list);
 			if (data->ops->free)
 				data->ops->free(data->ops, data);
 		}

@@ -894,7 +894,7 @@ int __trace_bputs(unsigned long ip, cons
 EXPORT_SYMBOL_GPL(__trace_bputs);
 
 #ifdef CONFIG_TRACER_SNAPSHOT
-static void tracing_snapshot_instance(struct trace_array *tr)
+void tracing_snapshot_instance(struct trace_array *tr)
 {
 	struct tracer *tracer = tr->current_trace;
 	unsigned long flags;

@@ -950,7 +950,7 @@ static int resize_buffer_duplicate_size(
 					struct trace_buffer *size_buf, int cpu_id);
 static void set_buffer_entries(struct trace_buffer *buf, unsigned long val);
 
-static int alloc_snapshot(struct trace_array *tr)
+int tracing_alloc_snapshot_instance(struct trace_array *tr)
 {
 	int ret;
 

@@ -996,7 +996,7 @@ int tracing_alloc_snapshot(void)
 	struct trace_array *tr = &global_trace;
 	int ret;
 
-	ret = alloc_snapshot(tr);
+	ret = tracing_alloc_snapshot_instance(tr);
 	WARN_ON(ret < 0);
 
 	return ret;

@@ -5400,7 +5400,7 @@ static int tracing_set_tracer(struct tra
 
 #ifdef CONFIG_TRACER_MAX_TRACE
 	if (t->use_max_tr && !had_max_tr) {
-		ret = alloc_snapshot(tr);
+		ret = tracing_alloc_snapshot_instance(tr);
 		if (ret < 0)
 			goto out;
 	}

@@ -6378,7 +6378,7 @@ tracing_snapshot_write(struct file *filp
 		}
 #endif
 		if (!tr->allocated_snapshot) {
-			ret = alloc_snapshot(tr);
+			ret = tracing_alloc_snapshot_instance(tr);
 			if (ret < 0)
 				break;
 		}

@@ -7099,7 +7099,7 @@ ftrace_trace_snapshot_callback(struct tr
 		return ret;
 
  out_reg:
-	ret = alloc_snapshot(tr);
+	ret = tracing_alloc_snapshot_instance(tr);
 	if (ret < 0)
 		goto out;
 

@@ -1807,6 +1807,17 @@ static inline void __init trace_event_in
 static inline void trace_event_eval_update(struct trace_eval_map **map, int len) { }
 #endif
 
+#ifdef CONFIG_TRACER_SNAPSHOT
+void tracing_snapshot_instance(struct trace_array *tr);
+int tracing_alloc_snapshot_instance(struct trace_array *tr);
+#else
+static inline void tracing_snapshot_instance(struct trace_array *tr) { }
+static inline int tracing_alloc_snapshot_instance(struct trace_array *tr)
+{
+	return 0;
+}
+#endif
+
 extern struct trace_iterator *tracepoint_print_iter;
 
 #endif /* _LINUX_KERNEL_TRACE_H */

@@ -642,6 +642,7 @@ event_trigger_callback(struct event_comm
 	trigger_data->count = -1;
 	trigger_data->ops = trigger_ops;
 	trigger_data->cmd_ops = cmd_ops;
+	trigger_data->private_data = file;
 	INIT_LIST_HEAD(&trigger_data->list);
 	INIT_LIST_HEAD(&trigger_data->named_list);
 

@@ -1042,7 +1043,12 @@ static struct event_command trigger_trac
 static void
 snapshot_trigger(struct event_trigger_data *data, void *rec)
 {
-	tracing_snapshot();
+	struct trace_event_file *file = data->private_data;
+
+	if (file)
+		tracing_snapshot_instance(file->tr);
+	else
+		tracing_snapshot();
 }
 
 static void

@@ -1064,7 +1070,7 @@ register_snapshot_trigger(char *glob, st
 {
 	int ret = register_trigger(glob, ops, data, file);
 
-	if (ret > 0 && tracing_alloc_snapshot() != 0) {
+	if (ret > 0 && tracing_alloc_snapshot_instance(file->tr) != 0) {
 		unregister_trigger(glob, ops, data, file);
 		ret = 0;
 	}

@@ -1448,7 +1448,7 @@ static int security_context_to_sid_core(
 				      scontext_len, &context, def_sid);
 	if (rc == -EINVAL && force) {
 		context.str = str;
-		context.len = scontext_len;
+		context.len = strlen(str) + 1;
 		str = NULL;
 	} else if (rc)
 		goto out_unlock;

@@ -2604,7 +2604,7 @@ enum nl80211_attrs {
 #define NL80211_ATTR_KEYS NL80211_ATTR_KEYS
 #define NL80211_ATTR_FEATURE_FLAGS NL80211_ATTR_FEATURE_FLAGS
 
-#define NL80211_WIPHY_NAME_MAXLEN		128
+#define NL80211_WIPHY_NAME_MAXLEN		64
 
 #define NL80211_MAX_SUPP_RATES			32
 #define NL80211_MAX_SUPP_HT_RATES		77

@@ -3378,24 +3378,12 @@ static int wait_for_timeline(struct i915
 	return 0;
 }
 
-static int wait_for_engine(struct intel_engine_cs *engine, int timeout_ms)
-{
-	return wait_for(intel_engine_is_idle(engine), timeout_ms);
-}
-
 static int wait_for_engines(struct drm_i915_private *i915)
 {
-	struct intel_engine_cs *engine;
-	enum intel_engine_id id;
-
-	for_each_engine(engine, i915, id) {
-		if (GEM_WARN_ON(wait_for_engine(engine, 50))) {
-			i915_gem_set_wedged(i915);
-			return -EIO;
-		}
-
-		GEM_BUG_ON(intel_engine_get_seqno(engine) !=
-			   intel_engine_last_submit(engine));
+	if (wait_for(intel_engines_are_idle(i915), 50)) {
+		DRM_ERROR("Failed to idle engines, declaring wedged!\n");
+		i915_gem_set_wedged(i915);
+		return -EIO;
 	}
 
 	return 0;

@@ -4575,7 +4563,7 @@ int i915_gem_suspend(struct drm_i915_pri
 	ret = i915_gem_wait_for_idle(dev_priv,
 				     I915_WAIT_INTERRUPTIBLE |
 				     I915_WAIT_LOCKED);
-	if (ret)
+	if (ret && ret != -EIO)
 		goto err_unlock;
 
 	assert_kernel_context_is_current(dev_priv);

@@ -4619,11 +4607,12 @@ int i915_gem_suspend(struct drm_i915_pri
 	 * machine in an unusable condition.
 	 */
 	i915_gem_sanitize(dev_priv);
-	goto out_rpm_put;
+
+	intel_runtime_pm_put(dev_priv);
+	return 0;
 
 err_unlock:
 	mutex_unlock(&dev->struct_mutex);
-out_rpm_put:
 	intel_runtime_pm_put(dev_priv);
 	return ret;
 }

@@ -625,7 +625,7 @@ EXPORT_SYMBOL_GPL(dma_buf_detach);
 struct sg_table *dma_buf_map_attachment(struct dma_buf_attachment *attach,
 					enum dma_data_direction direction)
 {
-	struct sg_table *sg_table = ERR_PTR(-EINVAL);
+	struct sg_table *sg_table;
 
 	might_sleep();
 

@@ -176,10 +176,10 @@ int cz_dpm_powergate_uvd(struct pp_hwmgr
 		cz_dpm_powerup_uvd(hwmgr);
 		cgs_set_clockgating_state(hwmgr->device,
 						AMD_IP_BLOCK_TYPE_UVD,
-						AMD_PG_STATE_UNGATE);
+						AMD_CG_STATE_UNGATE);
 		cgs_set_powergating_state(hwmgr->device,
 						AMD_IP_BLOCK_TYPE_UVD,
-						AMD_CG_STATE_UNGATE);
+						AMD_PG_STATE_UNGATE);
 		cz_dpm_update_uvd_dpm(hwmgr, false);
 	}
 

@@ -208,11 +208,11 @@ int cz_dpm_powergate_vce(struct pp_hwmgr
 		cgs_set_clockgating_state(
 					hwmgr->device,
 					AMD_IP_BLOCK_TYPE_VCE,
-					AMD_PG_STATE_UNGATE);
+					AMD_CG_STATE_UNGATE);
 		cgs_set_powergating_state(
 					hwmgr->device,
 					AMD_IP_BLOCK_TYPE_VCE,
-					AMD_CG_STATE_UNGATE);
+					AMD_PG_STATE_UNGATE);
 		cz_dpm_update_vce_dpm(hwmgr);
 		cz_enable_disable_vce_dpm(hwmgr, true);
 		return 0;

@@ -162,7 +162,7 @@ int smu7_powergate_uvd(struct pp_hwmgr *
 				AMD_CG_STATE_UNGATE);
 		cgs_set_powergating_state(hwmgr->device,
 						AMD_IP_BLOCK_TYPE_UVD,
-						AMD_CG_STATE_UNGATE);
+						AMD_PG_STATE_UNGATE);
 		smu7_update_uvd_dpm(hwmgr, false);
 	}
 

@@ -299,9 +299,6 @@ static void _rtl92c_get_txpower_writeval
 			writeVal = 0x00000000;
 		if (rtlpriv->dm.dynamic_txhighpower_lvl == TXHIGHPWRLEVEL_BT1)
 			writeVal = writeVal - 0x06060606;
-		else if (rtlpriv->dm.dynamic_txhighpower_lvl ==
-			 TXHIGHPWRLEVEL_BT2)
-			writeVal = writeVal;
 		*(p_outwriteval + rf) = writeVal;
 	}
 }

@@ -274,7 +274,6 @@ int sst_dma_new(struct sst_dsp *sst)
 	struct sst_pdata *sst_pdata = sst->pdata;
 	struct sst_dma *dma;
 	struct resource mem;
-	const char *dma_dev_name;
 	int ret = 0;
 
 	if (sst->pdata->resindex_dma_base == -1)

@@ -285,7 +284,6 @@ int sst_dma_new(struct sst_dsp *sst)
 	* is attached to the ADSP IP. */
 	switch (sst->pdata->dma_engine) {
 	case SST_DMA_TYPE_DW:
-		dma_dev_name = "dw_dmac";
 		break;
 	default:
 		dev_err(sst->dev, "error: invalid DMA engine %d\n",

@@ -54,7 +54,6 @@ static int ec_response_timed_out(void)
 static int cros_ec_pkt_xfer_lpc(struct cros_ec_device *ec,
 				struct cros_ec_command *msg)
 {
-	struct ec_host_request *request;
 	struct ec_host_response response;
 	u8 sum;
 	int ret = 0;

@@ -65,8 +64,6 @@ static int cros_ec_pkt_xfer_lpc(struct c
 	/* Write buffer */
 	cros_ec_lpc_write_bytes(EC_LPC_ADDR_HOST_PACKET, ret, ec->dout);
 
-	request = (struct ec_host_request *)ec->dout;
-
 	/* Here we go */
 	sum = EC_COMMAND_PROTOCOL_3;
 	cros_ec_lpc_write_bytes(EC_LPC_ADDR_HOST_CMD, 1, &sum);

@@ -334,7 +334,7 @@ struct tcp_sock {
 
 /* Receiver queue space */
 	struct {
-		int	space;
+		u32	space;
 		u32	seq;
 		u64	time;
 	} rcvq_space;

@@ -591,8 +591,8 @@ static inline void tcp_rcv_rtt_measure_t
 void tcp_rcv_space_adjust(struct sock *sk)
 {
 	struct tcp_sock *tp = tcp_sk(sk);
+	u32 copied;
 	int time;
-	int copied;
 
 	tcp_mstamp_refresh(tp);
 	time = tcp_stamp_us_delta(tp->tcp_mstamp, tp->rcvq_space.time);

@@ -615,12 +615,13 @@ void tcp_rcv_space_adjust(struct sock *s
 
 	if (sysctl_tcp_moderate_rcvbuf &&
 	    !(sk->sk_userlocks & SOCK_RCVBUF_LOCK)) {
-		int rcvwin, rcvmem, rcvbuf;
+		int rcvmem, rcvbuf;
+		u64 rcvwin;
 
 		/* minimal window to cope with packet losses, assuming
 		 * steady state. Add some cushion because of small variations.
 		 */
-		rcvwin = (copied << 1) + 16 * tp->advmss;
+		rcvwin = ((u64)copied << 1) + 16 * tp->advmss;
 
 		/* If rate increased by 25%,
 		 *	assume slow start, rcvwin = 3 * copied

@@ -640,7 +641,8 @@ void tcp_rcv_space_adjust(struct sock *s
 		while (tcp_win_from_space(rcvmem) < tp->advmss)
 			rcvmem += 128;
 
-		rcvbuf = min(rcvwin / tp->advmss * rcvmem, sysctl_tcp_rmem[2]);
+		do_div(rcvwin, tp->advmss);
+		rcvbuf = min_t(u64, rcvwin * rcvmem, sysctl_tcp_rmem[2]);
 		if (rcvbuf > sk->sk_rcvbuf) {
 			sk->sk_rcvbuf = rcvbuf;
 

@@ -348,55 +348,6 @@ static const u16 ad7793_sample_freq_avai
 static const u16 ad7797_sample_freq_avail[16] = {0, 0, 0, 123, 62, 50, 0,
 					33, 0, 17, 16, 12, 10, 8, 6, 4};
 
-static ssize_t ad7793_read_frequency(struct device *dev,
-		struct device_attribute *attr,
-		char *buf)
-{
-	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
-	struct ad7793_state *st = iio_priv(indio_dev);
-
-	return sprintf(buf, "%d\n",
-	       st->chip_info->sample_freq_avail[AD7793_MODE_RATE(st->mode)]);
-}
-
-static ssize_t ad7793_write_frequency(struct device *dev,
-		struct device_attribute *attr,
-		const char *buf,
-		size_t len)
-{
-	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
-	struct ad7793_state *st = iio_priv(indio_dev);
-	long lval;
-	int i, ret;
-
-	ret = kstrtol(buf, 10, &lval);
-	if (ret)
-		return ret;
-
-	if (lval == 0)
-		return -EINVAL;
-
-	for (i = 0; i < 16; i++)
-		if (lval == st->chip_info->sample_freq_avail[i])
-			break;
-	if (i == 16)
-		return -EINVAL;
-
-	ret = iio_device_claim_direct_mode(indio_dev);
-	if (ret)
-		return ret;
-	st->mode &= ~AD7793_MODE_RATE(-1);
-	st->mode |= AD7793_MODE_RATE(i);
-	ad_sd_write_reg(&st->sd, AD7793_REG_MODE, sizeof(st->mode), st->mode);
-	iio_device_release_direct_mode(indio_dev);
-
-	return len;
-}
-
-static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO,
-		ad7793_read_frequency,
-		ad7793_write_frequency);
-
 static IIO_CONST_ATTR_SAMP_FREQ_AVAIL(
 	"470 242 123 62 50 39 33 19 17 16 12 10 8 6 4");
 

@@ -424,7 +375,6 @@ static IIO_DEVICE_ATTR_NAMED(in_m_in_sca
 		ad7793_show_scale_available, NULL, 0);
 
 static struct attribute *ad7793_attributes[] = {
-	&iio_dev_attr_sampling_frequency.dev_attr.attr,
 	&iio_const_attr_sampling_frequency_available.dev_attr.attr,
 	&iio_dev_attr_in_m_in_scale_available.dev_attr.attr,
 	NULL

@@ -435,7 +385,6 @@ static const struct attribute_group ad77
 };
 
 static struct attribute *ad7797_attributes[] = {
-	&iio_dev_attr_sampling_frequency.dev_attr.attr,
 	&iio_const_attr_sampling_frequency_available_ad7797.dev_attr.attr,
 	NULL
 };

@@ -505,6 +454,10 @@ static int ad7793_read_raw(struct iio_de
 			*val -= offset;
 		}
 		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		*val = st->chip_info
+			       ->sample_freq_avail[AD7793_MODE_RATE(st->mode)];
+		return IIO_VAL_INT;
 	}
 	return -EINVAL;
 }

@@ -542,6 +495,26 @@ static int ad7793_write_raw(struct iio_d
 				break;
 			}
 		break;
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		if (!val) {
+			ret = -EINVAL;
+			break;
+		}
+
+		for (i = 0; i < 16; i++)
+			if (val == st->chip_info->sample_freq_avail[i])
+				break;
+
+		if (i == 16) {
+			ret = -EINVAL;
+			break;
+		}
+
+		st->mode &= ~AD7793_MODE_RATE(-1);
+		st->mode |= AD7793_MODE_RATE(i);
+		ad_sd_write_reg(&st->sd, AD7793_REG_MODE, sizeof(st->mode),
+				st->mode);
+		break;
 	default:
 		ret = -EINVAL;
 	}

@@ -587,7 +587,7 @@ EXPORT_SYMBOL_GPL(iio_dma_buffer_set_byt
  * Should be used as the set_length callback for iio_buffer_access_ops
  * struct for DMA buffers.
  */
-int iio_dma_buffer_set_length(struct iio_buffer *buffer, int length)
+int iio_dma_buffer_set_length(struct iio_buffer *buffer, unsigned int length)
 {
 	/* Avoid an invalid state */
 	if (length < 2)

@@ -22,7 +22,7 @@ struct iio_kfifo {
 #define iio_to_kfifo(r) container_of(r, struct iio_kfifo, buffer)
 
 static inline int __iio_allocate_kfifo(struct iio_kfifo *buf,
-				int bytes_per_datum, int length)
+			size_t bytes_per_datum, unsigned int length)
 {
 	if ((length == 0) || (bytes_per_datum == 0))
 		return -EINVAL;

@@ -67,7 +67,7 @@ static int iio_set_bytes_per_datum_kfifo
 	return 0;
 }
 
-static int iio_set_length_kfifo(struct iio_buffer *r, int length)
+static int iio_set_length_kfifo(struct iio_buffer *r, unsigned int length)
 {
 	/* Avoid an invalid state */
 	if (length < 2)

@@ -53,7 +53,7 @@ struct iio_buffer_access_funcs {
 	int (*request_update)(struct iio_buffer *buffer);
 
 	int (*set_bytes_per_datum)(struct iio_buffer *buffer, size_t bpd);
-	int (*set_length)(struct iio_buffer *buffer, int length);
+	int (*set_length)(struct iio_buffer *buffer, unsigned int length);
 
 	int (*enable)(struct iio_buffer *buffer, struct iio_dev *indio_dev);
 	int (*disable)(struct iio_buffer *buffer, struct iio_dev *indio_dev);

@@ -72,10 +72,10 @@ struct iio_buffer_access_funcs {
  */
 struct iio_buffer {
 	/** @length: Number of datums in buffer. */
-	int length;
+	unsigned int length;
 
 	/**  @bytes_per_datum: Size of individual datum including timestamp. */
-	int bytes_per_datum;
+	size_t bytes_per_datum;
 
 	/**
 	 * @access: Buffer access functions associated with the

@@ -27,6 +27,13 @@ static inline int __iio_allocate_kfifo(s
 	if ((length == 0) || (bytes_per_datum == 0))
 		return -EINVAL;
 
+	/*
+	 * Make sure we don't overflow an unsigned int after kfifo rounds up to
+	 * the next power of 2.
+	 */
+	if (roundup_pow_of_two(length) > UINT_MAX / bytes_per_datum)
+		return -EINVAL;
+
 	return __kfifo_alloc((struct __kfifo *)&buf->kf, length,
 			     bytes_per_datum, GFP_KERNEL);
 }

@@ -30,7 +30,6 @@ struct xway_gphy_priv {
 	struct clk *gphy_clk_gate;
 	struct reset_control *gphy_reset;
 	struct reset_control *gphy_reset2;
-	struct notifier_block gphy_reboot_nb;
 	void __iomem *membase;
 	char *fw_name;
 };

@@ -64,24 +63,6 @@ static const struct of_device_id xway_gp
 };
 MODULE_DEVICE_TABLE(of, xway_gphy_match);
 
-static struct xway_gphy_priv *to_xway_gphy_priv(struct notifier_block *nb)
-{
-	return container_of(nb, struct xway_gphy_priv, gphy_reboot_nb);
-}
-
-static int xway_gphy_reboot_notify(struct notifier_block *reboot_nb,
-				   unsigned long code, void *unused)
-{
-	struct xway_gphy_priv *priv = to_xway_gphy_priv(reboot_nb);
-
-	if (priv) {
-		reset_control_assert(priv->gphy_reset);
-		reset_control_assert(priv->gphy_reset2);
-	}
-
-	return NOTIFY_DONE;
-}
-
 static int xway_gphy_load(struct device *dev, struct xway_gphy_priv *priv,
 			  dma_addr_t *dev_addr)
 {

@@ -205,14 +186,6 @@ static int xway_gphy_probe(struct platfo
 	reset_control_deassert(priv->gphy_reset);
 	reset_control_deassert(priv->gphy_reset2);
 
-	/* assert the gphy reset because it can hang after a reboot: */
-	priv->gphy_reboot_nb.notifier_call = xway_gphy_reboot_notify;
-	priv->gphy_reboot_nb.priority = -1;
-
-	ret = register_reboot_notifier(&priv->gphy_reboot_nb);
-	if (ret)
-		dev_warn(dev, "Failed to register reboot notifier\n");
-
 	platform_set_drvdata(pdev, priv);
 
 	return ret;

@@ -220,21 +193,12 @@ static int xway_gphy_probe(struct platfo
 
 static int xway_gphy_remove(struct platform_device *pdev)
 {
-	struct device *dev = &pdev->dev;
 	struct xway_gphy_priv *priv = platform_get_drvdata(pdev);
-	int ret;
-
-	reset_control_assert(priv->gphy_reset);
-	reset_control_assert(priv->gphy_reset2);
 
 	iowrite32be(0, priv->membase);
 
 	clk_disable_unprepare(priv->gphy_clk_gate);
 
-	ret = unregister_reboot_notifier(&priv->gphy_reboot_nb);
-	if (ret)
-		dev_warn(dev, "Failed to unregister reboot notifier\n");
-
 	return 0;
 }
 

@@ -809,7 +809,7 @@ long arch_ptrace(struct task_struct *chi
 				break;
 			}
 #endif
-			tmp = get_fpr32(&fregs[addr - FPR_BASE], 0);
+			tmp = get_fpr64(&fregs[addr - FPR_BASE], 0);
 			break;
 		case PC:
 			tmp = regs->cp0_epc;

@@ -108,7 +108,7 @@ long compat_arch_ptrace(struct task_stru
 						addr & 1);
 				break;
 			}
-			tmp = get_fpr32(&fregs[addr - FPR_BASE], 0);
+			tmp = get_fpr64(&fregs[addr - FPR_BASE], 0);
 			break;
 		case PC:
 			tmp = regs->cp0_epc;

@@ -721,6 +721,10 @@ int mips_set_process_fp_mode(struct task
 	if (value & ~known_bits)
 		return -EOPNOTSUPP;
 
+	/* Setting FRE without FR is not supported.  */
+	if ((value & (PR_FP_MODE_FR | PR_FP_MODE_FRE)) == PR_FP_MODE_FRE)
+		return -EOPNOTSUPP;
+
 	/* Avoid inadvertently triggering emulation */
 	if ((value & PR_FP_MODE_FR) && raw_cpu_has_fpu &&
 	    !(raw_current_cpu_data.fpu_id & MIPS_FPIR_F64))

@@ -51,6 +51,8 @@ struct srp_internal {
 	struct transport_container rport_attr_cont;
 };
 
+static int scsi_is_srp_rport(const struct device *dev);
+
 #define to_srp_internal(tmpl) container_of(tmpl, struct srp_internal, t)
 
 #define	dev_to_rport(d)	container_of(d, struct srp_rport, dev)

@@ -60,9 +62,24 @@ static inline struct Scsi_Host *rport_to
 	return dev_to_shost(r->dev.parent);
 }
 
+static int find_child_rport(struct device *dev, void *data)
+{
+	struct device **child = data;
+
+	if (scsi_is_srp_rport(dev)) {
+		WARN_ON_ONCE(*child);
+		*child = dev;
+	}
+	return 0;
+}
+
 static inline struct srp_rport *shost_to_rport(struct Scsi_Host *shost)
 {
-	return transport_class_to_srp_rport(&shost->shost_gendev);
+	struct device *child = NULL;
+
+	WARN_ON_ONCE(device_for_each_child(&shost->shost_gendev, &child,
+					   find_child_rport) < 0);
+	return child ? dev_to_rport(child) : NULL;
 }
 
 /**

@@ -600,7 +617,8 @@ enum blk_eh_timer_return srp_timed_out(s
 	struct srp_rport *rport = shost_to_rport(shost);
 
 	pr_debug("timeout for sdev %s\n", dev_name(&sdev->sdev_gendev));
-	return rport->fast_io_fail_tmo < 0 && rport->dev_loss_tmo < 0 &&
+	return rport && rport->fast_io_fail_tmo < 0 &&
+		rport->dev_loss_tmo < 0 &&
 		i->f->reset_timer_if_blocked && scsi_device_blocked(sdev) ?
 		BLK_EH_RESET_TIMER : BLK_EH_NOT_HANDLED;
 }

@@ -682,7 +682,7 @@ static void stm_device_release(struct de
 {
 	struct stm_device *stm = to_stm_device(dev);
 
-	kfree(stm);
+	vfree(stm);
 }
 
 int stm_register_device(struct device *parent, struct stm_data *stm_data,

@@ -699,7 +699,7 @@ int stm_register_device(struct device *p
 		return -EINVAL;
 
 	nmasters = stm_data->sw_end - stm_data->sw_start + 1;
-	stm = kzalloc(sizeof(*stm) + nmasters * sizeof(void *), GFP_KERNEL);
+	stm = vzalloc(sizeof(*stm) + nmasters * sizeof(void *));
 	if (!stm)
 		return -ENOMEM;
 

@@ -752,7 +752,7 @@ err_device:
 	/* matches device_initialize() above */
 	put_device(&stm->dev);
 err_free:
-	kfree(stm);
+	vfree(stm);
 
 	return err;
 }

@@ -27,6 +27,7 @@
 #include <linux/stm.h>
 #include <linux/fs.h>
 #include <linux/mm.h>
+#include <linux/vmalloc.h>
 #include "stm.h"
 
 #include <uapi/linux/stm.h>

@@ -434,7 +434,7 @@ static int __ib_cache_gid_get(struct ib_
 		return -EINVAL;
 
 	if (table->data_vec[index].props & GID_TABLE_ENTRY_INVALID)
-		return -EAGAIN;
+		return -EINVAL;
 
 	memcpy(gid, &table->data_vec[index].gid, sizeof(*gid));
 	if (attr) {

@@ -2388,7 +2388,7 @@ static void __split_huge_page(struct pag
 		__split_huge_page_tail(head, i, lruvec, list);
 		/* Some pages can be beyond i_size: drop them from page cache */
 		if (head[i].index >= end) {
-			__ClearPageDirty(head + i);
+			ClearPageDirty(head + i);
 			__delete_from_page_cache(head + i, NULL);
 			if (IS_ENABLED(CONFIG_SHMEM) && PageSwapBacked(head))
 				shmem_uncharge(head->mapping->host, 1);

@@ -372,16 +372,15 @@ static void rt2x00queue_create_tx_descri
 
 	/*
 	 * Determine IFS values
-	 * - Use TXOP_BACKOFF for probe and management frames except beacons
+	 * - Use TXOP_BACKOFF for management frames except beacons
 	 * - Use TXOP_SIFS for fragment bursts
 	 * - Use TXOP_HTTXOP for everything else
 	 *
 	 * Note: rt2800 devices won't use CTS protection (if used)
 	 * for frames not transmitted with TXOP_HTTXOP
 	 */
-	if ((ieee80211_is_mgmt(hdr->frame_control) &&
-	     !ieee80211_is_beacon(hdr->frame_control)) ||
-	    (tx_info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE))
+	if (ieee80211_is_mgmt(hdr->frame_control) &&
+	    !ieee80211_is_beacon(hdr->frame_control))
 		txdesc->u.ht.txop = TXOP_BACKOFF;
 	else if (!(tx_info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT))
 		txdesc->u.ht.txop = TXOP_SIFS;

@@ -741,8 +741,8 @@ err_nomem:
 		/* Reset the page to write-back before releasing */
 		set_memory_wb((unsigned long)win->block[i].bdesc, 1);
 #endif
-		dma_free_coherent(msc_dev(msc), size, win->block[i].bdesc,
-				  win->block[i].addr);
+		dma_free_coherent(msc_dev(msc)->parent->parent, size,
+				  win->block[i].bdesc, win->block[i].addr);
 	}
 	kfree(win);
 

@@ -777,7 +777,7 @@ static void msc_buffer_win_free(struct m
 		/* Reset the page to write-back before releasing */
 		set_memory_wb((unsigned long)win->block[i].bdesc, 1);
 #endif
-		dma_free_coherent(msc_dev(win->msc), PAGE_SIZE,
+		dma_free_coherent(msc_dev(win->msc)->parent->parent, PAGE_SIZE,
 				  win->block[i].bdesc, win->block[i].addr);
 	}
 

@@ -1139,6 +1139,7 @@ int drm_dp_psr_setup_time(const u8 psr_c
 	static const u16 psr_setup_time_us[] = {
 		PSR_SETUP_TIME(330),
 		PSR_SETUP_TIME(275),
+		PSR_SETUP_TIME(220),
 		PSR_SETUP_TIME(165),
 		PSR_SETUP_TIME(110),
 		PSR_SETUP_TIME(55),

@@ -379,21 +379,17 @@ static unsigned long slice_find_area(str
 
 static inline void slice_or_mask(struct slice_mask *dst, struct slice_mask *src)
 {
-	DECLARE_BITMAP(result, SLICE_NUM_HIGH);
-
 	dst->low_slices |= src->low_slices;
-	bitmap_or(result, dst->high_slices, src->high_slices, SLICE_NUM_HIGH);
-	bitmap_copy(dst->high_slices, result, SLICE_NUM_HIGH);
+	bitmap_or(dst->high_slices, dst->high_slices, src->high_slices,
+		  SLICE_NUM_HIGH);
 }
 
 static inline void slice_andnot_mask(struct slice_mask *dst, struct slice_mask *src)
 {
-	DECLARE_BITMAP(result, SLICE_NUM_HIGH);
-
 	dst->low_slices &= ~src->low_slices;
 
-	bitmap_andnot(result, dst->high_slices, src->high_slices, SLICE_NUM_HIGH);
-	bitmap_copy(dst->high_slices, result, SLICE_NUM_HIGH);
+	bitmap_andnot(dst->high_slices, dst->high_slices, src->high_slices,
+		      SLICE_NUM_HIGH);
 }
 
 #ifdef CONFIG_PPC_64K_PAGES

@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_POWERPC_BOOK3S_64_SLICE_H
+#define _ASM_POWERPC_BOOK3S_64_SLICE_H
+
+#ifdef CONFIG_PPC_MM_SLICES
+
+#define SLICE_LOW_SHIFT		28
+#define SLICE_LOW_TOP		(0x100000000ul)
+#define SLICE_NUM_LOW		(SLICE_LOW_TOP >> SLICE_LOW_SHIFT)
+#define GET_LOW_SLICE_INDEX(addr)	((addr) >> SLICE_LOW_SHIFT)
+
+#define SLICE_HIGH_SHIFT	40
+#define SLICE_NUM_HIGH		(H_PGTABLE_RANGE >> SLICE_HIGH_SHIFT)
+#define GET_HIGH_SLICE_INDEX(addr)	((addr) >> SLICE_HIGH_SHIFT)
+
+#else /* CONFIG_PPC_MM_SLICES */
+
+#define get_slice_psize(mm, addr)	((mm)->context.user_psize)
+#define slice_set_user_psize(mm, psize)		\
+do {						\
+	(mm)->context.user_psize = (psize);	\
+	(mm)->context.sllp = SLB_VSID_USER | mmu_psize_defs[(psize)].sllp; \
+} while (0)
+
+#endif /* CONFIG_PPC_MM_SLICES */
+
+#endif /* _ASM_POWERPC_BOOK3S_64_SLICE_H */

@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_POWERPC_NOHASH_64_SLICE_H
+#define _ASM_POWERPC_NOHASH_64_SLICE_H
+
+#ifdef CONFIG_PPC_64K_PAGES
+#define get_slice_psize(mm, addr)	MMU_PAGE_64K
+#else /* CONFIG_PPC_64K_PAGES */
+#define get_slice_psize(mm, addr)	MMU_PAGE_4K
+#endif /* !CONFIG_PPC_64K_PAGES */
+#define slice_set_user_psize(mm, psize)	do { BUG(); } while (0)
+
+#endif /* _ASM_POWERPC_NOHASH_64_SLICE_H */

@@ -344,5 +344,6 @@ typedef struct page *pgtable_t;
 
 #include <asm-generic/memory_model.h>
 #endif /* __ASSEMBLY__ */
+#include <asm/slice.h>
 
 #endif /* _ASM_POWERPC_PAGE_H */

65 lines not on this page · raw message

@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_POWERPC_SLICE_H
+#define _ASM_POWERPC_SLICE_H
+
+#ifdef CONFIG_PPC_BOOK3S_64
+#include <asm/book3s/64/slice.h>
+#else
+#include <asm/nohash/64/slice.h>
+#endif
+
+#ifdef CONFIG_PPC_MM_SLICES
+
+#ifdef CONFIG_HUGETLB_PAGE
+#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
+#endif
+#define HAVE_ARCH_UNMAPPED_AREA
+#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
+
+#ifndef __ASSEMBLY__
+
+struct mm_struct;
+
+unsigned long slice_get_unmapped_area(unsigned long addr, unsigned long len,
+				      unsigned long flags, unsigned int psize,
+				      int topdown);
+
+unsigned int get_slice_psize(struct mm_struct *mm, unsigned long addr);
+
+void slice_set_user_psize(struct mm_struct *mm, unsigned int psize);
+void slice_set_range_psize(struct mm_struct *mm, unsigned long start,
+			   unsigned long len, unsigned int psize);
+#endif /* __ASSEMBLY__ */
+
+#else /* CONFIG_PPC_MM_SLICES */
+
+#define slice_set_range_psize(mm, start, len, psize)	\
+	slice_set_user_psize((mm), (psize))
+#endif /* CONFIG_PPC_MM_SLICES */
+
+#endif /* _ASM_POWERPC_SLICE_H */