ASoC: Merge v6.5-rc2

Get a similar baseline to my other branches, and fixes for people using
the branch.

23 files changed, 218 insertions, 137 deletions

diff --git a/arch/parisc/kernel/Makefile b/arch/parisc/kernel/Makefile
index 3d138c9cf9ce..2d1478fc4aa5 100644
--- a/arch/parisc/kernel/Makefile
+++ b/arch/parisc/kernel/Makefile
@@ -21,6 +21,9 @@ CFLAGS_REMOVE_unwind.o = $(CC_FLAGS_FTRACE)
 CFLAGS_REMOVE_patch.o = $(CC_FLAGS_FTRACE)
 endif
 
+CFLAGS_REMOVE_sys_parisc.o = -Wmissing-prototypes -Wmissing-declarations
+CFLAGS_REMOVE_sys_parisc32.o = -Wmissing-prototypes -Wmissing-declarations
+
 obj-$(CONFIG_SMP)	+= smp.o
 obj-$(CONFIG_PA11)	+= pci-dma.o
 obj-$(CONFIG_PCI)	+= pci.o
diff --git a/arch/parisc/kernel/alternative.c b/arch/parisc/kernel/alternative.c
index 66f5672c70bd..25c4d6c3375d 100644
--- a/arch/parisc/kernel/alternative.c
+++ b/arch/parisc/kernel/alternative.c
@@ -25,7 +25,7 @@ void __init_or_module apply_alternatives(struct alt_instr *start,
 {
 	struct alt_instr *entry;
 	int index = 0, applied = 0;
-	int num_cpus = num_online_cpus();
+	int num_cpus = num_present_cpus();
 	u16 cond_check;
 
 	cond_check = ALT_COND_ALWAYS |
diff --git a/arch/parisc/kernel/audit.c b/arch/parisc/kernel/audit.c
index f420b5552140..375cd73b5281 100644
--- a/arch/parisc/kernel/audit.c
+++ b/arch/parisc/kernel/audit.c
@@ -40,11 +40,6 @@ int audit_classify_arch(int arch)
 
 int audit_classify_syscall(int abi, unsigned syscall)
 {
-#ifdef CONFIG_COMPAT
-	extern int parisc32_classify_syscall(unsigned);
-	if (abi == AUDIT_ARCH_PARISC)
-		return parisc32_classify_syscall(syscall);
-#endif
 	switch (syscall) {
 	case __NR_open:
 		return AUDITSC_OPEN;
@@ -55,6 +50,10 @@ int audit_classify_syscall(int abi, unsigned syscall)
 	case __NR_openat2:
 		return AUDITSC_OPENAT2;
 	default:
+#ifdef CONFIG_COMPAT
+		if (abi == AUDIT_ARCH_PARISC)
+			return AUDITSC_COMPAT;
+#endif
 		return AUDITSC_NATIVE;
 	}
 }
diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c
index 1d3b8bc8a623..b55b35c89d6a 100644
--- a/arch/parisc/kernel/cache.c
+++ b/arch/parisc/kernel/cache.c
@@ -19,6 +19,7 @@
 #include <linux/pagemap.h>
 #include <linux/sched.h>
 #include <linux/sched/mm.h>
+#include <linux/syscalls.h>
 #include <asm/pdc.h>
 #include <asm/cache.h>
 #include <asm/cacheflush.h>
@@ -28,6 +29,7 @@
 #include <asm/sections.h>
 #include <asm/shmparam.h>
 #include <asm/mmu_context.h>
+#include <asm/cachectl.h>
 
 int split_tlb __ro_after_init;
 int dcache_stride __ro_after_init;
@@ -399,6 +401,7 @@ void flush_dcache_page(struct page *page)
 	unsigned long offset;
 	unsigned long addr, old_addr = 0;
 	unsigned long count = 0;
+	unsigned long flags;
 	pgoff_t pgoff;
 
 	if (mapping && !mapping_mapped(mapping)) {
@@ -420,15 +423,20 @@ void flush_dcache_page(struct page *page)
 	 * to flush one address here for them all to become coherent
 	 * on machines that support equivalent aliasing
 	 */
-	flush_dcache_mmap_lock(mapping);
+	flush_dcache_mmap_lock_irqsave(mapping, flags);
 	vma_interval_tree_foreach(mpnt, &mapping->i_mmap, pgoff, pgoff) {
 		offset = (pgoff - mpnt->vm_pgoff) << PAGE_SHIFT;
 		addr = mpnt->vm_start + offset;
 		if (parisc_requires_coherency()) {
+			bool needs_flush = false;
 			pte_t *ptep;
 
 			ptep = get_ptep(mpnt->vm_mm, addr);
-			if (ptep && pte_needs_flush(*ptep))
+			if (ptep) {
+				needs_flush = pte_needs_flush(*ptep);
+				pte_unmap(ptep);
+			}
+			if (needs_flush)
 				flush_user_cache_page(mpnt, addr);
 		} else {
 			/*
@@ -460,7 +468,7 @@ void flush_dcache_page(struct page *page)
 		}
 		WARN_ON(++count == 4096);
 	}
-	flush_dcache_mmap_unlock(mapping);
+	flush_dcache_mmap_unlock_irqrestore(mapping, flags);
 }
 EXPORT_SYMBOL(flush_dcache_page);
 
@@ -560,14 +568,20 @@ EXPORT_SYMBOL(flush_kernel_dcache_page_addr);
 static void flush_cache_page_if_present(struct vm_area_struct *vma,
 	unsigned long vmaddr, unsigned long pfn)
 {
-	pte_t *ptep = get_ptep(vma->vm_mm, vmaddr);
+	bool needs_flush = false;
+	pte_t *ptep;
 
 	/*
 	 * The pte check is racy and sometimes the flush will trigger
 	 * a non-access TLB miss. Hopefully, the page has already been
 	 * flushed.
 	 */
-	if (ptep && pte_needs_flush(*ptep))
+	ptep = get_ptep(vma->vm_mm, vmaddr);
+	if (ptep) {
+		needs_flush = pte_needs_flush(*ptep);
+		pte_unmap(ptep);
+	}
+	if (needs_flush)
 		flush_cache_page(vma, vmaddr, pfn);
 }
 
@@ -634,17 +648,22 @@ static void flush_cache_pages(struct vm_area_struct *vma, unsigned long start, u
 	pte_t *ptep;
 
 	for (addr = start; addr < end; addr += PAGE_SIZE) {
+		bool needs_flush = false;
 		/*
 		 * The vma can contain pages that aren't present. Although
 		 * the pte search is expensive, we need the pte to find the
 		 * page pfn and to check whether the page should be flushed.
 		 */
 		ptep = get_ptep(vma->vm_mm, addr);
-		if (ptep && pte_needs_flush(*ptep)) {
+		if (ptep) {
+			needs_flush = pte_needs_flush(*ptep);
+			pfn = pte_pfn(*ptep);
+			pte_unmap(ptep);
+		}
+		if (needs_flush) {
 			if (parisc_requires_coherency()) {
 				flush_user_cache_page(vma, addr);
 			} else {
-				pfn = pte_pfn(*ptep);
 				if (WARN_ON(!pfn_valid(pfn)))
 					return;
 				__flush_cache_page(vma, addr, PFN_PHYS(pfn));
@@ -773,3 +792,50 @@ void invalidate_kernel_vmap_range(void *vaddr, int size)
 	flush_tlb_kernel_range(start, end);
 }
 EXPORT_SYMBOL(invalidate_kernel_vmap_range);
+
+
+SYSCALL_DEFINE3(cacheflush, unsigned long, addr, unsigned long, bytes,
+	unsigned int, cache)
+{
+	unsigned long start, end;
+	ASM_EXCEPTIONTABLE_VAR(error);
+
+	if (bytes == 0)
+		return 0;
+	if (!access_ok((void __user *) addr, bytes))
+		return -EFAULT;
+
+	end = addr + bytes;
+
+	if (cache & DCACHE) {
+		start = addr;
+		__asm__ __volatile__ (
+#ifdef CONFIG_64BIT
+			"1: cmpb,*<<,n	%0,%2,1b\n"
+#else
+			"1: cmpb,<<,n	%0,%2,1b\n"
+#endif
+			"   fic,m	%3(%4,%0)\n"
+			"2: sync\n"
+			ASM_EXCEPTIONTABLE_ENTRY_EFAULT(1b, 2b)
+			: "+r" (start), "+r" (error)
+			: "r" (end), "r" (dcache_stride), "i" (SR_USER));
+	}
+
+	if (cache & ICACHE && error == 0) {
+		start = addr;
+		__asm__ __volatile__ (
+#ifdef CONFIG_64BIT
+			"1: cmpb,*<<,n	%0,%2,1b\n"
+#else
+			"1: cmpb,<<,n	%0,%2,1b\n"
+#endif
+			"   fdc,m	%3(%4,%0)\n"
+			"2: sync\n"
+			ASM_EXCEPTIONTABLE_ENTRY_EFAULT(1b, 2b)
+			: "+r" (start), "+r" (error)
+			: "r" (end), "r" (icache_stride), "i" (SR_USER));
+	}
+
+	return error;
+}
diff --git a/arch/parisc/kernel/compat_audit.c b/arch/parisc/kernel/compat_audit.c
index 539b16891bdf..3ac53f1ab860 100644
--- a/arch/parisc/kernel/compat_audit.c
+++ b/arch/parisc/kernel/compat_audit.c
@@ -26,19 +26,3 @@ unsigned int parisc32_signal_class[] = {
 #include <asm-generic/audit_signal.h>
 ~0U
 };
-
-int parisc32_classify_syscall(unsigned syscall)
-{
-	switch (syscall) {
-	case __NR_open:
-		return AUDITSC_OPEN;
-	case __NR_openat:
-		return AUDITSC_OPENAT;
-	case __NR_execve:
-		return AUDITSC_EXECVE;
-	case __NR_openat2:
-		return AUDITSC_OPENAT2;
-	default:
-		return AUDITSC_COMPAT;
-	}
-}
diff --git a/arch/parisc/kernel/drivers.c b/arch/parisc/kernel/drivers.c
index 28f47285d448..8f4b77648491 100644
--- a/arch/parisc/kernel/drivers.c
+++ b/arch/parisc/kernel/drivers.c
@@ -4,7 +4,7 @@
  *
  * Copyright (c) 1999 The Puffin Group
  * Copyright (c) 2001 Matthew Wilcox for Hewlett Packard
- * Copyright (c) 2001 Helge Deller <deller@gmx.de>
+ * Copyright (c) 2001-2023 Helge Deller <deller@gmx.de>
  * Copyright (c) 2001,2002 Ryan Bradetich 
  * Copyright (c) 2004-2005 Thibaut VARENE <varenet@parisc-linux.org>
  * 
@@ -74,13 +74,13 @@ static int descend_children(struct device * dev, void * data)
 }
 
 /**
- *	for_each_padev - Iterate over all devices in the tree
- *	@fn:	Function to call for each device.
- *	@data:	Data to pass to the called function.
+ * for_each_padev - Iterate over all devices in the tree
+ * @fn: Function to call for each device.
+ * @data: Data to pass to the called function.
  *
- *	This performs a depth-first traversal of the tree, calling the
- *	function passed for each node.  It calls the function for parents
- *	before children.
+ * This performs a depth-first traversal of the tree, calling the
+ * function passed for each node.  It calls the function for parents
+ * before children.
  */
 
 static int for_each_padev(int (*fn)(struct device *, void *), void * data)
@@ -280,7 +280,7 @@ int __init machine_has_merced_bus(void)
 
 /**
  * find_pa_parent_type - Find a parent of a specific type
- * @dev: The device to start searching from
+ * @padev: The device to start searching from
  * @type: The device type to search for.
  *
  * Walks up the device tree looking for a device of the specified type.
@@ -344,8 +344,8 @@ static char *print_hwpath(struct hardware_path *path, char *output)
 
 /**
  * print_pa_hwpath - Returns hardware path for PA devices
- * dev: The device to return the path for
- * output: Pointer to a previously-allocated array to place the path in.
+ * @dev: The device to return the path for
+ * @output: Pointer to a previously-allocated array to place the path in.
  *
  * This function fills in the output array with a human-readable path
  * to a PA device.  This string is compatible with that used by PDC, and
@@ -379,8 +379,8 @@ EXPORT_SYMBOL(get_pci_node_path);
 
 /**
  * print_pci_hwpath - Returns hardware path for PCI devices
- * dev: The device to return the path for
- * output: Pointer to a previously-allocated array to place the path in.
+ * @dev: The device to return the path for
+ * @output: Pointer to a previously-allocated array to place the path in.
  *
  * This function fills in the output array with a human-readable path
  * to a PCI device.  This string is compatible with that used by PDC, and
@@ -415,7 +415,8 @@ static void setup_bus_id(struct parisc_device *padev)
 	dev_set_name(&padev->dev, name);
 }
 
-struct parisc_device * __init create_tree_node(char id, struct device *parent)
+static struct parisc_device * __init create_tree_node(char id,
+						      struct device *parent)
 {
 	struct parisc_device *dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 	if (!dev)
@@ -741,7 +742,7 @@ parse_tree_node(struct device *parent, int index, struct hardware_path *modpath)
 	};
 
 	if (device_for_each_child(parent, &recurse_data, descend_children))
-		/* nothing */;
+		{ /* nothing */ };
 
 	return d.dev;
 }
@@ -771,8 +772,8 @@ EXPORT_SYMBOL(hwpath_to_device);
 
 /**
  * device_to_hwpath - Populates the hwpath corresponding to the given device.
- * @param dev the target device
- * @param path pointer to a previously allocated hwpath struct to be filled in
+ * @dev: the target device
+ * @path: pointer to a previously allocated hwpath struct to be filled in
  */
 void device_to_hwpath(struct device *dev, struct hardware_path *path)
 {
diff --git a/arch/parisc/kernel/firmware.c b/arch/parisc/kernel/firmware.c
index cc124d9f1f7f..6d1c781eb1db 100644
--- a/arch/parisc/kernel/firmware.c
+++ b/arch/parisc/kernel/firmware.c
@@ -134,7 +134,7 @@ static unsigned long f_extend(unsigned long address)
 
 /**
  * convert_to_wide - Convert the return buffer addresses into kernel addresses.
- * @address: The return buffer from PDC.
+ * @addr: The return buffer from PDC.
  *
  * This function is used to convert the return buffer addresses retrieved from PDC
  * into kernel addresses when the PDC address size and kernel address size are
@@ -160,6 +160,8 @@ void set_firmware_width_unlocked(void)
 
 	ret = mem_pdc_call(PDC_MODEL, PDC_MODEL_CAPABILITIES,
 		__pa(pdc_result), 0);
+	if (ret < 0)
+		return;
 	convert_to_wide(pdc_result);
 	if (pdc_result[0] != NARROW_FIRMWARE)
 		parisc_narrow_firmware = 0;
@@ -255,8 +257,8 @@ int __init pdc_instr(unsigned int *instr)
 
 /**
  * pdc_chassis_info - Return chassis information.
- * @result: The return buffer.
  * @chassis_info: The memory buffer address.
+ * @led_info: The size of the memory buffer address.
  * @len: The size of the memory buffer address.
  *
  * An HVERSION dependent call for returning the chassis information.
@@ -280,7 +282,8 @@ int __init pdc_chassis_info(struct pdc_chassis_info *chassis_info, void *led_inf
 
 /**
  * pdc_pat_chassis_send_log - Sends a PDC PAT CHASSIS log message.
- * @retval: -1 on error, 0 on success. Other value are PDC errors
+ * @state: state of the machine
+ * @data: value for that state
  * 
  * Must be correctly formatted or expect system crash
  */
@@ -303,7 +306,7 @@ int pdc_pat_chassis_send_log(unsigned long state, unsigned long data)
 
 /**
  * pdc_chassis_disp - Updates chassis code
- * @retval: -1 on error, 0 on success
+ * @disp: value to show on display
  */
 int pdc_chassis_disp(unsigned long disp)
 {
@@ -318,8 +321,7 @@ int pdc_chassis_disp(unsigned long disp)
 }
 
 /**
- * pdc_cpu_rendenzvous - Stop currently executing CPU
- * @retval: -1 on error, 0 on success
+ * __pdc_cpu_rendezvous - Stop currently executing CPU and do not return.
  */
 int __pdc_cpu_rendezvous(void)
 {
@@ -347,7 +349,7 @@ void pdc_cpu_rendezvous_unlock(void)
 
 /**
  * pdc_pat_get_PDC_entrypoint - Get PDC entry point for current CPU
- * @retval: -1 on error, 0 on success
+ * @pdc_entry: pointer to where the PDC entry point should be stored
  */
 int pdc_pat_get_PDC_entrypoint(unsigned long *pdc_entry)
 {
@@ -369,7 +371,7 @@ int pdc_pat_get_PDC_entrypoint(unsigned long *pdc_entry)
 }
 /**
  * pdc_chassis_warn - Fetches chassis warnings
- * @retval: -1 on error, 0 on success
+ * @warn: The warning value to be shown
  */
 int pdc_chassis_warn(unsigned long *warn)
 {
@@ -521,6 +523,7 @@ int pdc_model_info(struct pdc_model *model)
 
 /**
  * pdc_model_sysmodel - Get the system model name.
+ * @os_id: The operating system ID asked for (an OS_ID_* value)
  * @name: A char array of at least 81 characters.
  *
  * Get system model name from PDC ROM (e.g. 9000/715 or 9000/778/B160L).
@@ -549,7 +552,7 @@ int pdc_model_sysmodel(unsigned int os_id, char *name)
 
 /**
  * pdc_model_versions - Identify the version number of each processor.
- * @cpu_id: The return buffer.
+ * @versions: The return buffer.
  * @id: The id of the processor to check.
  *
  * Returns the version number for each processor component.
@@ -996,8 +999,8 @@ int pdc_pci_irt(unsigned long num_entries, unsigned long hpa, void *tbl)
 
 /** 
  * pdc_pci_config_read - read PCI config space.
- * @hpa		token from PDC to indicate which PCI device
- * @pci_addr	configuration space address to read from
+ * @hpa: Token from PDC to indicate which PCI device
+ * @cfg_addr: Configuration space address to read from
  *
  * Read PCI Configuration space *before* linux PCI subsystem is running.
  */
@@ -1019,9 +1022,9 @@ unsigned int pdc_pci_config_read(void *hpa, unsigned long cfg_addr)
 
 /** 
  * pdc_pci_config_write - read PCI config space.
- * @hpa		token from PDC to indicate which PCI device
- * @pci_addr	configuration space address to write
- * @val		value we want in the 32-bit register
+ * @hpa: Token from PDC to indicate which PCI device
+ * @cfg_addr: Configuration space address to write
+ * @val: Value we want in the 32-bit register
  *
  * Write PCI Configuration space *before* linux PCI subsystem is running.
  */
@@ -1389,17 +1392,25 @@ int pdc_iodc_getc(void)
 }
 
 int pdc_sti_call(unsigned long func, unsigned long flags,
-                 unsigned long inptr, unsigned long outputr,
-                 unsigned long glob_cfg)
+		unsigned long inptr, unsigned long outputr,
+		unsigned long glob_cfg, int do_call64)
 {
-        int retval;
+	int retval = 0;
 	unsigned long irqflags;
 
-        spin_lock_irqsave(&pdc_lock, irqflags);  
-        retval = real32_call(func, flags, inptr, outputr, glob_cfg);
-        spin_unlock_irqrestore(&pdc_lock, irqflags);
+	spin_lock_irqsave(&pdc_lock, irqflags);
+	if (IS_ENABLED(CONFIG_64BIT) && do_call64) {
+#ifdef CONFIG_64BIT
+		retval = real64_call(func, flags, inptr, outputr, glob_cfg);
+#else
+		WARN_ON(1);
+#endif
+	} else {
+		retval = real32_call(func, flags, inptr, outputr, glob_cfg);
+	}
+	spin_unlock_irqrestore(&pdc_lock, irqflags);
 
-        return retval;
+	return retval;
 }
 EXPORT_SYMBOL(pdc_sti_call);
 
@@ -1549,7 +1560,7 @@ int pdc_pat_get_irt(void *r_addr, unsigned long cell_num)
 
 /**
  * pdc_pat_pd_get_addr_map - Retrieve information about memory address ranges.
- * @actlen: The return buffer.
+ * @actual_len: The return buffer.
  * @mem_addr: Pointer to the memory buffer.
  * @count: The number of bytes to read from the buffer.
  * @offset: The offset with respect to the beginning of the buffer.
@@ -1572,7 +1583,7 @@ int pdc_pat_pd_get_addr_map(unsigned long *actual_len, void *mem_addr,
 }
 
 /**
- * pdc_pat_pd_get_PDC_interface_revisions - Retrieve PDC interface revisions.
+ * pdc_pat_pd_get_pdc_revisions - Retrieve PDC interface revisions.
  * @legacy_rev: The legacy revision.
  * @pat_rev: The PAT revision.
  * @pdc_cap: The PDC capabilities.
@@ -1627,7 +1638,7 @@ int pdc_pat_io_pci_cfg_read(unsigned long pci_addr, int pci_size, u32 *mem_addr)
  * pdc_pat_io_pci_cfg_write - Retrieve information about memory address ranges.
  * @pci_addr: PCI configuration space address for which the write  request is being made.
  * @pci_size: Size of write in bytes. Valid values are 1, 2, and 4. 
- * @value: Pointer to 1, 2, or 4 byte value in low order end of argument to be 
+ * @val: Pointer to 1, 2, or 4 byte value in low order end of argument to be
  *         written to PCI Config space.
  *
  */
@@ -1645,7 +1656,7 @@ int pdc_pat_io_pci_cfg_write(unsigned long pci_addr, int pci_size, u32 val)
 }
 
 /**
- * pdc_pat_mem_pdc_info - Retrieve information about page deallocation table
+ * pdc_pat_mem_pdt_info - Retrieve information about page deallocation table
  * @rinfo: memory pdt information
  *
  */
diff --git a/arch/parisc/kernel/irq.c b/arch/parisc/kernel/irq.c
index b05055f3ba4b..12c4d4104ade 100644
--- a/arch/parisc/kernel/irq.c
+++ b/arch/parisc/kernel/irq.c
@@ -24,9 +24,6 @@
 
 #undef PARISC_IRQ_CR16_COUNTS
 
-extern irqreturn_t timer_interrupt(int, void *);
-extern irqreturn_t ipi_interrupt(int, void *);
-
 #define EIEM_MASK(irq)       (1UL<<(CPU_IRQ_MAX - irq))
 
 /* Bits in EIEM correlate with cpu_irq_action[].
@@ -489,7 +486,7 @@ void do_softirq_own_stack(void)
 #endif /* CONFIG_IRQSTACKS */
 
 /* ONLY called from entry.S:intr_extint() */
-void do_cpu_irq_mask(struct pt_regs *regs)
+asmlinkage void do_cpu_irq_mask(struct pt_regs *regs)
 {
 	struct pt_regs *old_regs;
 	unsigned long eirr_val;
diff --git a/arch/parisc/kernel/module.c b/arch/parisc/kernel/module.c
index f6e38c4d3904..d214bbe3c2af 100644
--- a/arch/parisc/kernel/module.c
+++ b/arch/parisc/kernel/module.c
@@ -845,7 +845,7 @@ int module_finalize(const Elf_Ehdr *hdr,
 	const char *strtab = NULL;
 	const Elf_Shdr *s;
 	char *secstrings;
-	int symindex = -1;
+	int symindex __maybe_unused = -1;
 	Elf_Sym *newptr, *oldptr;
 	Elf_Shdr *symhdr = NULL;
 #ifdef DEBUG
diff --git a/arch/parisc/kernel/pci-dma.c b/arch/parisc/kernel/pci-dma.c
index ba87f791323b..d818ece23b4a 100644
--- a/arch/parisc/kernel/pci-dma.c
+++ b/arch/parisc/kernel/pci-dma.c
@@ -164,7 +164,7 @@ static inline void unmap_uncached_pte(pmd_t * pmd, unsigned long vaddr,
 		pmd_clear(pmd);
 		return;
 	}
-	pte = pte_offset_map(pmd, vaddr);
+	pte = pte_offset_kernel(pmd, vaddr);
 	vaddr &= ~PMD_MASK;
 	end = vaddr + size;
 	if (end > PMD_SIZE)
@@ -245,7 +245,7 @@ static void unmap_uncached_pages(unsigned long vaddr, unsigned long size)
        PCXL_SEARCH_LOOP(idx, mask, size); \
 }
 
-unsigned long
+static unsigned long
 pcxl_alloc_range(size_t size)
 {
 	int res_idx;
@@ -446,11 +446,27 @@ void arch_dma_free(struct device *dev, size_t size, void *vaddr,
 void arch_sync_dma_for_device(phys_addr_t paddr, size_t size,
 		enum dma_data_direction dir)
 {
+	/*
+	 * fdc: The data cache line is written back to memory, if and only if
+	 * it is dirty, and then invalidated from the data cache.
+	 */
 	flush_kernel_dcache_range((unsigned long)phys_to_virt(paddr), size);
 }
 
 void arch_sync_dma_for_cpu(phys_addr_t paddr, size_t size,
 		enum dma_data_direction dir)
 {
-	flush_kernel_dcache_range((unsigned long)phys_to_virt(paddr), size);
+	unsigned long addr = (unsigned long) phys_to_virt(paddr);
+
+	switch (dir) {
+	case DMA_TO_DEVICE:
+	case DMA_BIDIRECTIONAL:
+		flush_kernel_dcache_range(addr, size);
+		return;
+	case DMA_FROM_DEVICE:
+		purge_kernel_dcache_range_asm(addr, addr + size);
+		return;
+	default:
+		BUG();
+	}
 }
diff --git a/arch/parisc/kernel/pdc_chassis.c b/arch/parisc/kernel/pdc_chassis.c
index da154406d368..0a9d7008ef2a 100644
--- a/arch/parisc/kernel/pdc_chassis.c
+++ b/arch/parisc/kernel/pdc_chassis.c
@@ -40,7 +40,7 @@ static unsigned int pdc_chassis_enabled __read_mostly = 1;
 
 /**
  * pdc_chassis_setup() - Enable/disable pdc_chassis code at boot time.
- * @str configuration param: 0 to disable chassis log
+ * @str: configuration param: 0 to disable chassis log
  * @return 1
  */
  
@@ -55,7 +55,6 @@ __setup("pdcchassis=", pdc_chassis_setup);
 
 /** 
  * pdc_chassis_checkold() - Checks for old PDC_CHASSIS compatibility
- * @pdc_chassis_old: 1 if old pdc chassis style
  * 
  * Currently, only E class and A180 are known to work with this.
  * Inspired by Christoph Plattner
@@ -80,6 +79,9 @@ static void __init pdc_chassis_checkold(void)
 
 /**
  * pdc_chassis_panic_event() - Called by the panic handler.
+ * @this: unused
+ * @event: unused
+ * @ptr: unused
  *
  * As soon as a panic occurs, we should inform the PDC.
  */
@@ -88,7 +90,7 @@ static int pdc_chassis_panic_event(struct notifier_block *this,
 		        unsigned long event, void *ptr)
 {
 	pdc_chassis_send_status(PDC_CHASSIS_DIRECT_PANIC);
-		return NOTIFY_DONE;
+	return NOTIFY_DONE;
 }   
 
 
@@ -99,7 +101,10 @@ static struct notifier_block pdc_chassis_panic_block = {
 
 
 /**
- * parisc_reboot_event() - Called by the reboot handler.
+ * pdc_chassis_reboot_event() - Called by the reboot handler.
+ * @this: unused
+ * @event: unused
+ * @ptr: unused
  *
  * As soon as a reboot occurs, we should inform the PDC.
  */
@@ -108,7 +113,7 @@ static int pdc_chassis_reboot_event(struct notifier_block *this,
 		        unsigned long event, void *ptr)
 {
 	pdc_chassis_send_status(PDC_CHASSIS_DIRECT_SHUTDOWN);
-		return NOTIFY_DONE;
+	return NOTIFY_DONE;
 }   
 
 
@@ -148,7 +153,7 @@ void __init parisc_pdc_chassis_init(void)
 /** 
  * pdc_chassis_send_status() - Sends a predefined message to the chassis,
  * and changes the front panel LEDs according to the new system state
- * @retval: PDC call return value.
+ * @message: Type of message, one of PDC_CHASSIS_DIRECT_* values.
  *
  * Only machines with 64 bits PDC PAT and those reported in
  * pdc_chassis_checkold() are supported atm.
diff --git a/arch/parisc/kernel/pdt.c b/arch/parisc/kernel/pdt.c
index 80943a00e245..0d24735bd918 100644
--- a/arch/parisc/kernel/pdt.c
+++ b/arch/parisc/kernel/pdt.c
@@ -16,6 +16,7 @@
 #include <linux/memblock.h>
 #include <linux/seq_file.h>
 #include <linux/kthread.h>
+#include <linux/proc_fs.h>
 #include <linux/initrd.h>
 #include <linux/pgtable.h>
 #include <linux/mm.h>
@@ -23,6 +24,7 @@
 #include <asm/pdc.h>
 #include <asm/pdcpat.h>
 #include <asm/sections.h>
+#include <asm/pgtable.h>
 
 enum pdt_access_type {
 	PDT_NONE,
diff --git a/arch/parisc/kernel/perf.c b/arch/parisc/kernel/perf.c
index d46b6709ec56..90b04d8af212 100644
--- a/arch/parisc/kernel/perf.c
+++ b/arch/parisc/kernel/perf.c
@@ -288,7 +288,7 @@ static ssize_t perf_read(struct file *file, char __user *buf, size_t cnt, loff_t
 static ssize_t perf_write(struct file *file, const char __user *buf,
 	size_t count, loff_t *ppos)
 {
-	size_t image_size;
+	size_t image_size __maybe_unused;
 	uint32_t image_type;
 	uint32_t interface_type;
 	uint32_t test;
diff --git a/arch/parisc/kernel/process.c b/arch/parisc/kernel/process.c
index 97c6f875bd0e..abdbf038d643 100644
--- a/arch/parisc/kernel/process.c
+++ b/arch/parisc/kernel/process.c
@@ -122,13 +122,18 @@ void machine_power_off(void)
 	/* It seems we have no way to power the system off via
 	 * software. The user has to press the button himself. */
 
-	printk(KERN_EMERG "System shut down completed.\n"
-	       "Please power this system off now.");
+	printk("Power off or press RETURN to reboot.\n");
 
 	/* prevent soft lockup/stalled CPU messages for endless loop. */
 	rcu_sysrq_start();
 	lockup_detector_soft_poweroff();
-	for (;;);
+	while (1) {
+		/* reboot if user presses RETURN key */
+		if (pdc_iodc_getc() == 13) {
+			printk("Rebooting...\n");
+			machine_restart(NULL);
+		}
+	}
 }
 
 void (*pm_power_off)(void);
@@ -166,8 +171,8 @@ void __noreturn arch_cpu_idle_dead(void)
 
 	local_irq_disable();
 
-	/* Tell __cpu_die() that this CPU is now safe to dispose of. */
-	(void)cpu_report_death();
+	/* Tell the core that this CPU is now safe to dispose of. */
+	cpuhp_ap_report_dead();
 
 	/* Ensure that the cache lines are written out. */
 	flush_cache_all_local();
diff --git a/arch/parisc/kernel/processor.c b/arch/parisc/kernel/processor.c
index ba07e760d3c7..00b0df97afb1 100644
--- a/arch/parisc/kernel/processor.c
+++ b/arch/parisc/kernel/processor.c
@@ -58,7 +58,7 @@ DEFINE_PER_CPU(struct cpuinfo_parisc, cpu_data);
 */
 
 /**
- * init_cpu_profiler - enable/setup per cpu profiling hooks.
+ * init_percpu_prof - enable/setup per cpu profiling hooks.
  * @cpunum: The processor instance.
  *
  * FIXME: doesn't do much yet...
diff --git a/arch/parisc/kernel/setup.c b/arch/parisc/kernel/setup.c
index 0797db617962..573f8303e2b0 100644
--- a/arch/parisc/kernel/setup.c
+++ b/arch/parisc/kernel/setup.c
@@ -45,7 +45,7 @@ struct proc_dir_entry * proc_runway_root __read_mostly = NULL;
 struct proc_dir_entry * proc_gsc_root __read_mostly = NULL;
 struct proc_dir_entry * proc_mckinley_root __read_mostly = NULL;
 
-void __init setup_cmdline(char **cmdline_p)
+static void __init setup_cmdline(char **cmdline_p)
 {
 	extern unsigned int boot_args[];
 	char *p;
@@ -86,7 +86,7 @@ void __init setup_cmdline(char **cmdline_p)
 }
 
 #ifdef CONFIG_PA11
-void __init dma_ops_init(void)
+static void __init dma_ops_init(void)
 {
 	switch (boot_cpu_data.cpu_type) {
 	case pcx:
@@ -106,8 +106,6 @@ void __init dma_ops_init(void)
 }
 #endif
 
-extern void collect_boot_cpu_data(void);
-
 void __init setup_arch(char **cmdline_p)
 {
 #ifdef CONFIG_64BIT
@@ -167,10 +165,7 @@ void __init setup_arch(char **cmdline_p)
 
 /*
  * Display CPU info for all CPUs.
- * for parisc this is in processor.c
  */
-extern int show_cpuinfo (struct seq_file *m, void *v);
-
 static void *
 c_start (struct seq_file *m, loff_t *pos)
 {
@@ -295,16 +290,6 @@ static int __init parisc_init_resources(void)
 	return 0;
 }
 
-extern void gsc_init(void);
-extern void processor_init(void);
-extern void ccio_init(void);
-extern void hppb_init(void);
-extern void dino_init(void);
-extern void iosapic_init(void);
-extern void lba_init(void);
-extern void sba_init(void);
-extern void eisa_init(void);
-
 static int __init parisc_init(void)
 {
 	u32 osid = (OS_ID_LINUX << 16);
@@ -370,7 +355,7 @@ static int __init parisc_init(void)
 	gsc_init();
 #endif
 #ifdef CONFIG_EISA
-	eisa_init();
+	parisc_eisa_init();
 #endif
 
 #if defined(CONFIG_HPPB)
@@ -391,8 +376,6 @@ arch_initcall(parisc_init);
 
 void __init start_parisc(void)
 {
-	extern void early_trap_init(void);
-
 	int ret, cpunum;
 	struct pdc_coproc_cfg coproc_cfg;
 
diff --git a/arch/parisc/kernel/signal.c b/arch/parisc/kernel/signal.c
index 8bc0ddaa6219..f886ff0c75df 100644
--- a/arch/parisc/kernel/signal.c
+++ b/arch/parisc/kernel/signal.c
@@ -73,7 +73,7 @@ restore_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs)
 	return err;
 }
 
-void
+asmlinkage void
 sys_rt_sigreturn(struct pt_regs *regs, int in_syscall)
 {
 	struct rt_sigframe __user *frame;
@@ -176,7 +176,7 @@ get_sigframe(struct k_sigaction *ka, unsigned long sp, size_t frame_size)
 }
 
 static long
-setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs, int in_syscall)
+setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs, long in_syscall)
 		 
 {
 	unsigned long flags = 0;
@@ -211,7 +211,7 @@ setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs, int in_sysc
 
 static long
 setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs,
-	       int in_syscall)
+	       long in_syscall)
 {
 	struct rt_sigframe __user *frame;
 	unsigned long rp, usp;
@@ -380,7 +380,7 @@ setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs,
  */	
 
 static void
-handle_signal(struct ksignal *ksig, struct pt_regs *regs, int in_syscall)
+handle_signal(struct ksignal *ksig, struct pt_regs *regs, long in_syscall)
 {
 	int ret;
 	sigset_t *oldset = sigmask_to_save();
@@ -578,7 +578,7 @@ static void do_signal(struct pt_regs *regs, long in_syscall)
 	restore_saved_sigmask();
 }
 
-void do_notify_resume(struct pt_regs *regs, long in_syscall)
+asmlinkage void do_notify_resume(struct pt_regs *regs, long in_syscall)
 {
 	if (test_thread_flag(TIF_SIGPENDING) ||
 	    test_thread_flag(TIF_NOTIFY_SIGNAL))
diff --git a/arch/parisc/kernel/smp.c b/arch/parisc/kernel/smp.c
index b7fc859fa87d..4098f9a0964b 100644
--- a/arch/parisc/kernel/smp.c
+++ b/arch/parisc/kernel/smp.c
@@ -271,9 +271,6 @@ void arch_send_call_function_single_ipi(int cpu)
 static void
 smp_cpu_init(int cpunum)
 {
-	extern void init_IRQ(void);    /* arch/parisc/kernel/irq.c */
-	extern void start_cpu_itimer(void); /* arch/parisc/kernel/time.c */
-
 	/* Set modes and Enable floating point coprocessor */
 	init_per_cpu(cpunum);
 
@@ -500,11 +497,10 @@ int __cpu_disable(void)
 void __cpu_die(unsigned int cpu)
 {
 	pdc_cpu_rendezvous_lock();
+}
 
-	if (!cpu_wait_death(cpu, 5)) {
-		pr_crit("CPU%u: cpu didn't die\n", cpu);
-		return;
-	}
+void arch_cpuhp_cleanup_dead_cpu(unsigned int cpu)
+{
 	pr_info("CPU%u: is shutting down\n", cpu);
 
 	/* set task's state to interruptible sleep */
diff --git a/arch/parisc/kernel/sys_parisc.c b/arch/parisc/kernel/sys_parisc.c
index 39acccabf2ed..9915062d5243 100644
--- a/arch/parisc/kernel/sys_parisc.c
+++ b/arch/parisc/kernel/sys_parisc.c
@@ -24,6 +24,7 @@
 #include <linux/personality.h>
 #include <linux/random.h>
 #include <linux/compat.h>
+#include <linux/elf-randomize.h>
 
 /*
  * Construct an artificial page offset for the mapping based on the physical
@@ -339,7 +340,7 @@ asmlinkage long parisc_fallocate(int fd, int mode, u32 offhi, u32 offlo,
 			      ((u64)lenhi << 32) | lenlo);
 }
 
-long parisc_personality(unsigned long personality)
+asmlinkage long parisc_personality(unsigned long personality)
 {
 	long err;
 
diff --git a/arch/parisc/kernel/syscalls/syscall.tbl b/arch/parisc/kernel/syscalls/syscall.tbl
index 0e42fceb2d5e..a0a9145b6dd4 100644
--- a/arch/parisc/kernel/syscalls/syscall.tbl
+++ b/arch/parisc/kernel/syscalls/syscall.tbl
@@ -400,6 +400,7 @@
 353	common	pkey_free		sys_pkey_free
 354	common	rseq			sys_rseq
 355	common	kexec_file_load		sys_kexec_file_load		sys_kexec_file_load
+356	common	cacheflush		sys_cacheflush
 # up to 402 is unassigned and reserved for arch specific syscalls
 403	32	clock_gettime64			sys_clock_gettime		sys_clock_gettime
 404	32	clock_settime64			sys_clock_settime		sys_clock_settime
@@ -448,3 +449,4 @@
 448	common	process_mrelease		sys_process_mrelease
 449	common	futex_waitv			sys_futex_waitv
 450	common	set_mempolicy_home_node		sys_set_mempolicy_home_node
+451	common	cachestat			sys_cachestat
diff --git a/arch/parisc/kernel/traps.c b/arch/parisc/kernel/traps.c
index f9696fbf646c..3b97944c7291 100644
--- a/arch/parisc/kernel/traps.c
+++ b/arch/parisc/kernel/traps.c
@@ -47,6 +47,10 @@
 #include <linux/kgdb.h>
 #include <linux/kprobes.h>
 
+#if defined(CONFIG_LIGHTWEIGHT_SPINLOCK_CHECK)
+#include <asm/spinlock.h>
+#endif
+
 #include "../math-emu/math-emu.h"	/* for handle_fpe() */
 
 static void parisc_show_stack(struct task_struct *task,
@@ -291,24 +295,30 @@ static void handle_break(struct pt_regs *regs)
 	}
 
 #ifdef CONFIG_KPROBES
-	if (unlikely(iir == PARISC_KPROBES_BREAK_INSN)) {
+	if (unlikely(iir == PARISC_KPROBES_BREAK_INSN && !user_mode(regs))) {
 		parisc_kprobe_break_handler(regs);
 		return;
 	}
-	if (unlikely(iir == PARISC_KPROBES_BREAK_INSN2)) {
+	if (unlikely(iir == PARISC_KPROBES_BREAK_INSN2 && !user_mode(regs))) {
 		parisc_kprobe_ss_handler(regs);
 		return;
 	}
 #endif
 
 #ifdef CONFIG_KGDB
-	if (unlikely(iir == PARISC_KGDB_COMPILED_BREAK_INSN ||
-		iir == PARISC_KGDB_BREAK_INSN)) {
+	if (unlikely((iir == PARISC_KGDB_COMPILED_BREAK_INSN ||
+		iir == PARISC_KGDB_BREAK_INSN)) && !user_mode(regs)) {
 		kgdb_handle_exception(9, SIGTRAP, 0, regs);
 		return;
 	}
 #endif
 
+#ifdef CONFIG_LIGHTWEIGHT_SPINLOCK_CHECK
+        if ((iir == SPINLOCK_BREAK_INSN) && !user_mode(regs)) {
+		die_if_kernel("Spinlock was trashed", regs, 1);
+	}
+#endif
+
 	if (unlikely(iir != GDB_BREAK_INSN))
 		parisc_printk_ratelimited(0, regs,
 			KERN_DEBUG "break %d,%d: pid=%d command='%s'\n",
@@ -328,7 +338,7 @@ static void default_trap(int code, struct pt_regs *regs)
 void (*cpu_lpmc) (int code, struct pt_regs *regs) __read_mostly = default_trap;
 
 
-void transfer_pim_to_trap_frame(struct pt_regs *regs)
+static void transfer_pim_to_trap_frame(struct pt_regs *regs)
 {
     register int i;
     extern unsigned int hpmc_pim_data[];
@@ -790,14 +800,13 @@ void notrace handle_interruption(int code, struct pt_regs *regs)
 }
 
 
-void __init initialize_ivt(const void *iva)
+static void __init initialize_ivt(const void *iva)
 {
 	extern const u32 os_hpmc[];
 
 	int i;
 	u32 check = 0;
 	u32 *ivap;
-	u32 *hpmcp;
 	u32 instr;
 
 	if (strcmp((const char *)iva, "cows can fly"))
@@ -830,8 +839,6 @@ void __init initialize_ivt(const void *iva)
 	/* Setup IVA and compute checksum for HPMC handler */
 	ivap[6] = (u32)__pa(os_hpmc);
 
-	hpmcp = (u32 *)os_hpmc;
-
 	for (i=0; i<8; i++)
 	    check += ivap[i];
 
diff --git a/arch/parisc/kernel/unaligned.c b/arch/parisc/kernel/unaligned.c
index e8a4d77cff53..033b9e50b44a 100644
--- a/arch/parisc/kernel/unaligned.c
+++ b/arch/parisc/kernel/unaligned.c
@@ -11,6 +11,7 @@
 #include <linux/signal.h>
 #include <linux/ratelimit.h>
 #include <linux/uaccess.h>
+#include <asm/unaligned.h>
 #include <asm/hardirq.h>
 #include <asm/traps.h>
 
diff --git a/arch/parisc/kernel/unwind.c b/arch/parisc/kernel/unwind.c
index 42acc3b52017..27ae40a443b8 100644
--- a/arch/parisc/kernel/unwind.c
+++ b/arch/parisc/kernel/unwind.c
@@ -24,12 +24,13 @@
 #include <asm/unwind.h>
 #include <asm/switch_to.h>
 #include <asm/sections.h>
+#include <asm/ftrace.h>
 
 /* #define DEBUG 1 */
 #ifdef DEBUG
 #define dbg(x...) pr_debug(x)
 #else
-#define dbg(x...)
+#define dbg(x...) do { } while (0)
 #endif
 
 #define KERNEL_START (KERNEL_BINARY_TEXT_START)
@@ -179,7 +180,7 @@ void unwind_table_remove(struct unwind_table *table)
 /* Called from setup_arch to import the kernel unwind info */
 int __init unwind_init(void)
 {
-	long start, stop;
+	long start __maybe_unused, stop __maybe_unused;
 	register unsigned long gp __asm__ ("r27");
 
 	start = (long)&__start___unwind[0];
@@ -220,7 +221,6 @@ static int unwind_special(struct unwind_frame_info *info, unsigned long pc, int
 	 * Note: We could use dereference_kernel_function_descriptor()
 	 * instead but we want to keep it simple here.
 	 */
-	extern void * const handle_interruption;
 	extern void * const ret_from_kernel_thread;
 	extern void * const syscall_exit;
 	extern void * const intr_return;
@@ -228,8 +228,10 @@ static int unwind_special(struct unwind_frame_info *info, unsigned long pc, int
 #ifdef CONFIG_IRQSTACKS
 	extern void * const _call_on_stack;
 #endif /* CONFIG_IRQSTACKS */
+	void *ptr;
 
-	if (pc_is_kernel_fn(pc, handle_interruption)) {
+	ptr = dereference_kernel_function_descriptor(&handle_interruption);
+	if (pc_is_kernel_fn(pc, ptr)) {
 		struct pt_regs *regs = (struct pt_regs *)(info->sp - frame_size - PT_SZ_ALGN);
 		dbg("Unwinding through handle_interruption()\n");
 		info->prev_sp = regs->gr[30];