20 files changed, 86 insertions, 227 deletions

diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index 7e0bb9836b58..4d8f64d48597 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -51,6 +51,8 @@ config PARISC
 	select GENERIC_CLOCKEVENTS
 	select ARCH_NO_COHERENT_DMA_MMAP
 	select CPU_NO_EFFICIENT_FFS
+	select NEED_DMA_MAP_STATE
+	select NEED_SG_DMA_LENGTH
 
 	help
 	  The PA-RISC microprocessor is designed by Hewlett-Packard and used
@@ -111,12 +113,6 @@ config PM
 config STACKTRACE_SUPPORT
 	def_bool y
 
-config NEED_DMA_MAP_STATE
-	def_bool y
-
-config NEED_SG_DMA_LENGTH
-	def_bool y
-
 config ISA_DMA_API
 	bool
 
@@ -338,6 +334,7 @@ source "mm/Kconfig"
 config COMPAT
 	def_bool y
 	depends on 64BIT
+	select COMPAT_BINFMT_ELF if BINFMT_ELF
 
 config SYSVIPC_COMPAT
 	def_bool y
diff --git a/arch/parisc/Makefile b/arch/parisc/Makefile
index e2364ff59180..34ac503e28ad 100644
--- a/arch/parisc/Makefile
+++ b/arch/parisc/Makefile
@@ -123,6 +123,9 @@ INSTALL_TARGETS = zinstall install
 
 PHONY += bzImage $(BOOT_TARGETS) $(INSTALL_TARGETS)
 
+# Default kernel to build
+all: bzImage
+
 zImage: vmlinuz
 Image: vmlinux
 
diff --git a/arch/parisc/include/asm/compat.h b/arch/parisc/include/asm/compat.h
index c22db5323244..57b8b2a2fd4e 100644
--- a/arch/parisc/include/asm/compat.h
+++ b/arch/parisc/include/asm/compat.h
@@ -193,6 +193,12 @@ struct compat_shmid64_ds {
 };
 
 /*
+ * The type of struct elf_prstatus.pr_reg in compatible core dumps.
+ */
+#define COMPAT_ELF_NGREG 80
+typedef compat_ulong_t compat_elf_gregset_t[COMPAT_ELF_NGREG];
+
+/*
  * A pointer passed in from user mode. This should not
  * be used for syscall parameters, just declare them
  * as pointers because the syscall entry code will have
diff --git a/arch/parisc/include/asm/elf.h b/arch/parisc/include/asm/elf.h
index 382d75a2ee4f..f019d3ec0c1c 100644
--- a/arch/parisc/include/asm/elf.h
+++ b/arch/parisc/include/asm/elf.h
@@ -6,7 +6,7 @@
  * ELF register definitions..
  */
 
-#include <asm/ptrace.h>
+#include <linux/types.h>
 
 #define EM_PARISC 15
 
@@ -169,16 +169,12 @@ typedef struct elf64_fdesc {
 	__u64	gp;
 } Elf64_Fdesc;
 
-#ifdef __KERNEL__
-
 #ifdef CONFIG_64BIT
 #define Elf_Fdesc	Elf64_Fdesc
 #else
 #define Elf_Fdesc	Elf32_Fdesc
 #endif /*CONFIG_64BIT*/
 
-#endif /*__KERNEL__*/
-
 /* Legal values for p_type field of Elf32_Phdr/Elf64_Phdr.  */
 
 #define PT_HP_TLS		(PT_LOOS + 0x0)
@@ -213,44 +209,44 @@ typedef struct elf64_fdesc {
 #define PF_HP_SBP		0x08000000
 
 /*
+ * This yields a string that ld.so will use to load implementation
+ * specific libraries for optimization.  This is more specific in
+ * intent than poking at uname or /proc/cpuinfo.
+ */
+
+#define ELF_PLATFORM  ("PARISC")
+
+/*
  * The following definitions are those for 32-bit ELF binaries on a 32-bit
  * kernel and for 64-bit binaries on a 64-bit kernel.  To run 32-bit binaries
- * on a 64-bit kernel, arch/parisc/kernel/binfmt_elf32.c defines these
- * macros appropriately and then #includes binfmt_elf.c, which then includes
- * this file.
+ * on a 64-bit kernel, fs/compat_binfmt_elf.c defines ELF_CLASS and then
+ * #includes binfmt_elf.c, which then includes this file.
  */
 #ifndef ELF_CLASS
 
-/*
- * This is used to ensure we don't load something for the wrong architecture.
- *
- * Note that this header file is used by default in fs/binfmt_elf.c. So
- * the following macros are for the default case. However, for the 64
- * bit kernel we also support 32 bit parisc binaries. To do that
- * arch/parisc/kernel/binfmt_elf32.c defines its own set of these
- * macros, and then it includes fs/binfmt_elf.c to provide an alternate
- * elf binary handler for 32 bit binaries (on the 64 bit kernel).
- */
 #ifdef CONFIG_64BIT
-#define ELF_CLASS   ELFCLASS64
+#define ELF_CLASS	ELFCLASS64
 #else
 #define ELF_CLASS	ELFCLASS32
 #endif
 
 typedef unsigned long elf_greg_t;
 
-/*
- * This yields a string that ld.so will use to load implementation
- * specific libraries for optimization.  This is more specific in
- * intent than poking at uname or /proc/cpuinfo.
- */
-
-#define ELF_PLATFORM  ("PARISC\0")
-
 #define SET_PERSONALITY(ex) \
+({	\
 	set_personality((current->personality & ~PER_MASK) | PER_LINUX); \
 	current->thread.map_base = DEFAULT_MAP_BASE; \
-	current->thread.task_size = DEFAULT_TASK_SIZE \
+	current->thread.task_size = DEFAULT_TASK_SIZE; \
+ })
+
+#endif /* ! ELF_CLASS */
+
+#define COMPAT_SET_PERSONALITY(ex) \
+({	\
+	set_thread_flag(TIF_32BIT); \
+	current->thread.map_base = DEFAULT_MAP_BASE32; \
+	current->thread.task_size = DEFAULT_TASK_SIZE32; \
+ })
 
 /*
  * Fill in general registers in a core dump.  This saves pretty
@@ -277,10 +273,12 @@ typedef unsigned long elf_greg_t;
 
 #define ELF_CORE_COPY_REGS(dst, pt)	\
 	memset(dst, 0, sizeof(dst));	/* don't leak any "random" bits */ \
-	memcpy(dst + 0, pt->gr, 32 * sizeof(elf_greg_t)); \
-	memcpy(dst + 32, pt->sr, 8 * sizeof(elf_greg_t)); \
-	memcpy(dst + 40, pt->iaoq, 2 * sizeof(elf_greg_t)); \
-	memcpy(dst + 42, pt->iasq, 2 * sizeof(elf_greg_t)); \
+	{	int i; \
+		for (i = 0; i < 32; i++) dst[i] = pt->gr[i]; \
+		for (i = 0; i < 8; i++) dst[32 + i] = pt->sr[i]; \
+	} \
+	dst[40] = pt->iaoq[0]; dst[41] = pt->iaoq[1]; \
+	dst[42] = pt->iasq[0]; dst[43] = pt->iasq[1]; \
 	dst[44] = pt->sar;   dst[45] = pt->iir; \
 	dst[46] = pt->isr;   dst[47] = pt->ior; \
 	dst[48] = mfctl(22); dst[49] = mfctl(0); \
@@ -292,7 +290,7 @@ typedef unsigned long elf_greg_t;
 	dst[60] = mfctl(12); dst[61] = mfctl(13); \
 	dst[62] = mfctl(10); dst[63] = mfctl(15);
 
-#endif /* ! ELF_CLASS */
+#define CORE_DUMP_USE_REGSET
 
 #define ELF_NGREG 80	/* We only need 64 at present, but leave space
 			   for expansion. */
@@ -310,7 +308,10 @@ extern int dump_task_fpu (struct task_struct *, elf_fpregset_t *);
 struct pt_regs;	/* forward declaration... */
 
 
-#define elf_check_arch(x) ((x)->e_machine == EM_PARISC && (x)->e_ident[EI_CLASS] == ELF_CLASS)
+#define elf_check_arch(x)		\
+	((x)->e_machine == EM_PARISC && (x)->e_ident[EI_CLASS] == ELF_CLASS)
+#define compat_elf_check_arch(x)	\
+	((x)->e_machine == EM_PARISC && (x)->e_ident[EI_CLASS] == ELFCLASS32)
 
 /*
  * These are used to set parameters in the core dumps.
diff --git a/arch/parisc/include/asm/pci.h b/arch/parisc/include/asm/pci.h
index 96b7deec512d..3328fd17c19d 100644
--- a/arch/parisc/include/asm/pci.h
+++ b/arch/parisc/include/asm/pci.h
@@ -88,29 +88,6 @@ struct pci_hba_data {
 #endif /* !CONFIG_64BIT */
 
 /*
- * If the PCI device's view of memory is the same as the CPU's view of memory,
- * PCI_DMA_BUS_IS_PHYS is true.  The networking and block device layers use
- * this boolean for bounce buffer decisions.
- */
-#ifdef CONFIG_PA20
-/* All PA-2.0 machines have an IOMMU. */
-#define PCI_DMA_BUS_IS_PHYS	0
-#define parisc_has_iommu()	do { } while (0)
-#else
-
-#if defined(CONFIG_IOMMU_CCIO) || defined(CONFIG_IOMMU_SBA)
-extern int parisc_bus_is_phys; 	/* in arch/parisc/kernel/setup.c */
-#define PCI_DMA_BUS_IS_PHYS	parisc_bus_is_phys
-#define parisc_has_iommu()	do { parisc_bus_is_phys = 0; } while (0)
-#else
-#define PCI_DMA_BUS_IS_PHYS	1
-#define parisc_has_iommu()	do { } while (0)
-#endif
-
-#endif	/* !CONFIG_PA20 */
-
-
-/*
 ** Most PCI devices (eg Tulip, NCR720) also export the same registers
 ** to both MMIO and I/O port space.  Due to poor performance of I/O Port
 ** access under HP PCI bus adapters, strongly recommend the use of MMIO
diff --git a/arch/parisc/include/uapi/asm/siginfo.h b/arch/parisc/include/uapi/asm/siginfo.h
index be40331f757d..4a1062e05aaf 100644
--- a/arch/parisc/include/uapi/asm/siginfo.h
+++ b/arch/parisc/include/uapi/asm/siginfo.h
@@ -8,11 +8,4 @@
 
 #include <asm-generic/siginfo.h>
 
-/*
- * SIGFPE si_codes
- */
-#ifdef __KERNEL__
-#define FPE_FIXME	0	/* Broken dup of SI_USER */
-#endif /* __KERNEL__ */
-
 #endif
diff --git a/arch/parisc/kernel/Makefile b/arch/parisc/kernel/Makefile
index eafd06ab59ef..e5de34d00b1a 100644
--- a/arch/parisc/kernel/Makefile
+++ b/arch/parisc/kernel/Makefile
@@ -23,7 +23,7 @@ obj-$(CONFIG_SMP)	+= smp.o
 obj-$(CONFIG_PA11)	+= pci-dma.o
 obj-$(CONFIG_PCI)	+= pci.o
 obj-$(CONFIG_MODULES)	+= module.o
-obj-$(CONFIG_64BIT)	+= binfmt_elf32.o sys_parisc32.o signal32.o
+obj-$(CONFIG_64BIT)	+= sys_parisc32.o signal32.o
 obj-$(CONFIG_STACKTRACE)+= stacktrace.o
 obj-$(CONFIG_AUDIT)	+= audit.o
 obj64-$(CONFIG_AUDIT)	+= compat_audit.o
diff --git a/arch/parisc/kernel/binfmt_elf32.c b/arch/parisc/kernel/binfmt_elf32.c
deleted file mode 100644
index 20dfa081ed0b..000000000000
--- a/arch/parisc/kernel/binfmt_elf32.c
+++ /dev/null
@@ -1,98 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Support for 32-bit Linux/Parisc ELF binaries on 64 bit kernels
- *
- * Copyright (C) 2000 John Marvin
- * Copyright (C) 2000 Hewlett Packard Co.
- *
- * Heavily inspired from various other efforts to do the same thing
- * (ia64,sparc64/mips64)
- */
-
-/* Make sure include/asm-parisc/elf.h does the right thing */
-
-#define ELF_CLASS	ELFCLASS32
-
-#define ELF_CORE_COPY_REGS(dst, pt)	\
-	memset(dst, 0, sizeof(dst));	/* don't leak any "random" bits */ \
-	{	int i; \
-		for (i = 0; i < 32; i++) dst[i] = (elf_greg_t) pt->gr[i]; \
-		for (i = 0; i < 8; i++) dst[32 + i] = (elf_greg_t) pt->sr[i]; \
-	} \
-	dst[40] = (elf_greg_t) pt->iaoq[0]; dst[41] = (elf_greg_t) pt->iaoq[1]; \
-	dst[42] = (elf_greg_t) pt->iasq[0]; dst[43] = (elf_greg_t) pt->iasq[1]; \
-	dst[44] = (elf_greg_t) pt->sar;   dst[45] = (elf_greg_t) pt->iir; \
-	dst[46] = (elf_greg_t) pt->isr;   dst[47] = (elf_greg_t) pt->ior; \
-	dst[48] = (elf_greg_t) mfctl(22); dst[49] = (elf_greg_t) mfctl(0); \
-	dst[50] = (elf_greg_t) mfctl(24); dst[51] = (elf_greg_t) mfctl(25); \
-	dst[52] = (elf_greg_t) mfctl(26); dst[53] = (elf_greg_t) mfctl(27); \
-	dst[54] = (elf_greg_t) mfctl(28); dst[55] = (elf_greg_t) mfctl(29); \
-	dst[56] = (elf_greg_t) mfctl(30); dst[57] = (elf_greg_t) mfctl(31); \
-	dst[58] = (elf_greg_t) mfctl( 8); dst[59] = (elf_greg_t) mfctl( 9); \
-	dst[60] = (elf_greg_t) mfctl(12); dst[61] = (elf_greg_t) mfctl(13); \
-	dst[62] = (elf_greg_t) mfctl(10); dst[63] = (elf_greg_t) mfctl(15);
-
-
-typedef unsigned int elf_greg_t;
-
-#include <linux/spinlock.h>
-#include <asm/processor.h>
-#include <linux/module.h>
-#include <linux/elfcore.h>
-#include <linux/compat.h>		/* struct compat_timeval */
-
-#define elf_prstatus elf_prstatus32
-struct elf_prstatus32
-{
-	struct elf_siginfo pr_info;	/* Info associated with signal */
-	short	pr_cursig;		/* Current signal */
-	unsigned int pr_sigpend;	/* Set of pending signals */
-	unsigned int pr_sighold;	/* Set of held signals */
-	pid_t	pr_pid;
-	pid_t	pr_ppid;
-	pid_t	pr_pgrp;
-	pid_t	pr_sid;
-	struct compat_timeval pr_utime;		/* User time */
-	struct compat_timeval pr_stime;		/* System time */
-	struct compat_timeval pr_cutime;	/* Cumulative user time */
-	struct compat_timeval pr_cstime;	/* Cumulative system time */
-	elf_gregset_t pr_reg;	/* GP registers */
-	int pr_fpvalid;		/* True if math co-processor being used.  */
-};
-
-#define elf_prpsinfo elf_prpsinfo32
-struct elf_prpsinfo32
-{
-	char	pr_state;	/* numeric process state */
-	char	pr_sname;	/* char for pr_state */
-	char	pr_zomb;	/* zombie */
-	char	pr_nice;	/* nice val */
-	unsigned int pr_flag;	/* flags */
-	u16	pr_uid;
-	u16	pr_gid;
-	pid_t	pr_pid, pr_ppid, pr_pgrp, pr_sid;
-	/* Lots missing */
-	char	pr_fname[16];	/* filename of executable */
-	char	pr_psargs[ELF_PRARGSZ];	/* initial part of arg list */
-};
-
-#define init_elf_binfmt init_elf32_binfmt
-
-#define ELF_PLATFORM  ("PARISC32\0")
-
-/*
- * We should probably use this macro to set a flag somewhere to indicate
- * this is a 32 on 64 process. We could use PER_LINUX_32BIT, or we
- * could set a processor dependent flag in the thread_struct.
- */
-
-#undef SET_PERSONALITY
-#define SET_PERSONALITY(ex) \
-	set_thread_flag(TIF_32BIT); \
-	current->thread.map_base = DEFAULT_MAP_BASE32; \
-	current->thread.task_size = DEFAULT_TASK_SIZE32 \
-
-#undef ns_to_timeval
-#define ns_to_timeval ns_to_compat_timeval
-
-#include "../../../fs/binfmt_elf.c"
diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c
index a99da95fc9fd..bddd2acebdcc 100644
--- a/arch/parisc/kernel/cache.c
+++ b/arch/parisc/kernel/cache.c
@@ -254,7 +254,7 @@ parisc_cache_init(void)
 	}
 }
 
-void disable_sr_hashing(void)
+void __init disable_sr_hashing(void)
 {
 	int srhash_type, retval;
 	unsigned long space_bits;
diff --git a/arch/parisc/kernel/drivers.c b/arch/parisc/kernel/drivers.c
index 3b8507f71050..e0e1c9775c32 100644
--- a/arch/parisc/kernel/drivers.c
+++ b/arch/parisc/kernel/drivers.c
@@ -268,7 +268,7 @@ static struct parisc_device *find_device_by_addr(unsigned long hpa)
  * Walks up the device tree looking for a device of the specified type.
  * If it finds it, it returns it.  If not, it returns NULL.
  */
-const struct parisc_device * __init
+const struct parisc_device *
 find_pa_parent_type(const struct parisc_device *padev, int type)
 {
 	const struct device *dev = &padev->dev;
@@ -448,7 +448,8 @@ static int match_by_id(struct device * dev, void * data)
  * Checks all the children of @parent for a matching @id.  If none
  * found, it allocates a new device and returns it.
  */
-static struct parisc_device * alloc_tree_node(struct device *parent, char id)
+static struct parisc_device * __init alloc_tree_node(
+			struct device *parent, char id)
 {
 	struct match_id_data d = {
 		.id = id,
@@ -825,8 +826,8 @@ static void walk_lower_bus(struct parisc_device *dev)
  * devices which are not physically connected (such as extra serial &
  * keyboard ports).  This problem is not yet solved.
  */
-static void walk_native_bus(unsigned long io_io_low, unsigned long io_io_high,
-                            struct device *parent)
+static void __init walk_native_bus(unsigned long io_io_low,
+	unsigned long io_io_high, struct device *parent)
 {
 	int i, devices_found = 0;
 	unsigned long hpa = io_io_low;
diff --git a/arch/parisc/kernel/pacache.S b/arch/parisc/kernel/pacache.S
index 67b0f7532e83..22e6374ece44 100644
--- a/arch/parisc/kernel/pacache.S
+++ b/arch/parisc/kernel/pacache.S
@@ -38,9 +38,10 @@
 #include <asm/cache.h>
 #include <asm/ldcw.h>
 #include <linux/linkage.h>
+#include <linux/init.h>
 
-	.text
-	.align	128
+	.section .text.hot
+	.align	16
 
 ENTRY_CFI(flush_tlb_all_local)
 	.proc
@@ -328,8 +329,6 @@ fdsync:
 	.procend
 ENDPROC_CFI(flush_data_cache_local)
 
-	.align	16
-
 /* Macros to serialize TLB purge operations on SMP.  */
 
 	.macro	tlb_lock	la,flags,tmp
@@ -1216,6 +1215,8 @@ ENTRY_CFI(flush_kernel_icache_range_asm)
 	.procend
 ENDPROC_CFI(flush_kernel_icache_range_asm)
 
+	__INIT
+
 	/* align should cover use of rfi in disable_sr_hashing_asm and
 	 * srdis_done.
 	 */
diff --git a/arch/parisc/kernel/pci-dma.c b/arch/parisc/kernel/pci-dma.c
index 91bc0cac03a1..6df07ce4f3c2 100644
--- a/arch/parisc/kernel/pci-dma.c
+++ b/arch/parisc/kernel/pci-dma.c
@@ -367,19 +367,6 @@ static int proc_pcxl_dma_show(struct seq_file *m, void *v)
 	return 0;
 }
 
-static int proc_pcxl_dma_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, proc_pcxl_dma_show, NULL);
-}
-
-static const struct file_operations proc_pcxl_dma_ops = {
-	.owner		= THIS_MODULE,
-	.open		= proc_pcxl_dma_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
-
 static int __init
 pcxl_dma_init(void)
 {
@@ -397,8 +384,8 @@ pcxl_dma_init(void)
 			"pcxl_dma_init: Unable to create gsc /proc dir entry\n");
 	else {
 		struct proc_dir_entry* ent;
-		ent = proc_create("pcxl_dma", 0, proc_gsc_root,
-				  &proc_pcxl_dma_ops);
+		ent = proc_create_single("pcxl_dma", 0, proc_gsc_root,
+				proc_pcxl_dma_show);
 		if (!ent)
 			printk(KERN_WARNING
 				"pci-dma.c: Unable to create pcxl_dma /proc entry.\n");
diff --git a/arch/parisc/kernel/pci.c b/arch/parisc/kernel/pci.c
index 13ee3569959a..ae684ac6efb6 100644
--- a/arch/parisc/kernel/pci.c
+++ b/arch/parisc/kernel/pci.c
@@ -174,7 +174,7 @@ void pcibios_set_master(struct pci_dev *dev)
  * pcibios_init_bridge() initializes cache line and default latency
  * for pci controllers and pci-pci bridges
  */
-void __init pcibios_init_bridge(struct pci_dev *dev)
+void __ref pcibios_init_bridge(struct pci_dev *dev)
 {
 	unsigned short bridge_ctl, bridge_ctl_new;
 
diff --git a/arch/parisc/kernel/pdc_chassis.c b/arch/parisc/kernel/pdc_chassis.c
index 3e04242de5a7..28e07482b0f1 100644
--- a/arch/parisc/kernel/pdc_chassis.c
+++ b/arch/parisc/kernel/pdc_chassis.c
@@ -266,18 +266,6 @@ static int pdc_chassis_warn_show(struct seq_file *m, void *v)
 	return 0;
 }
 
-static int pdc_chassis_warn_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, pdc_chassis_warn_show, NULL);
-}
-
-static const struct file_operations pdc_chassis_warn_fops = {
-	.open		= pdc_chassis_warn_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
-
 static int __init pdc_chassis_create_procfs(void)
 {
 	unsigned long test;
@@ -292,7 +280,7 @@ static int __init pdc_chassis_create_procfs(void)
 
 	printk(KERN_INFO "Enabling PDC chassis warnings support v%s\n",
 			PDC_CHASSIS_VER);
-	proc_create("chassis", 0400, NULL, &pdc_chassis_warn_fops);
+	proc_create_single("chassis", 0400, NULL, pdc_chassis_warn_show);
 	return 0;
 }
 
diff --git a/arch/parisc/kernel/process.c b/arch/parisc/kernel/process.c
index bbe46571ff96..b931745815e0 100644
--- a/arch/parisc/kernel/process.c
+++ b/arch/parisc/kernel/process.c
@@ -112,14 +112,6 @@ void machine_restart(char *cmd)
 
 }
 
-void machine_halt(void)
-{
-	/*
-	** The LED/ChassisCodes are updated by the led_halt()
-	** function, called by the reboot notifier chain.
-	*/
-}
-
 void (*chassis_power_off)(void);
 
 /*
@@ -158,6 +150,11 @@ void machine_power_off(void)
 void (*pm_power_off)(void);
 EXPORT_SYMBOL(pm_power_off);
 
+void machine_halt(void)
+{
+	machine_power_off();
+}
+
 void flush_thread(void)
 {
 	/* Only needs to handle fpu stuff or perf monitors.
diff --git a/arch/parisc/kernel/setup.c b/arch/parisc/kernel/setup.c
index 0e9675f857a5..8d3a7b80ac42 100644
--- a/arch/parisc/kernel/setup.c
+++ b/arch/parisc/kernel/setup.c
@@ -58,11 +58,6 @@ 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;
 
-#if !defined(CONFIG_PA20) && (defined(CONFIG_IOMMU_CCIO) || defined(CONFIG_IOMMU_SBA))
-int parisc_bus_is_phys __read_mostly = 1;	/* Assume no IOMMU is present */
-EXPORT_SYMBOL(parisc_bus_is_phys);
-#endif
-
 void __init setup_cmdline(char **cmdline_p)
 {
 	extern unsigned int boot_args[];
diff --git a/arch/parisc/kernel/smp.c b/arch/parisc/kernel/smp.c
index 4065b5e48c9d..5e26dbede5fc 100644
--- a/arch/parisc/kernel/smp.c
+++ b/arch/parisc/kernel/smp.c
@@ -423,8 +423,7 @@ int __cpu_up(unsigned int cpu, struct task_struct *tidle)
 }
 
 #ifdef CONFIG_PROC_FS
-int __init
-setup_profiling_timer(unsigned int multiplier)
+int setup_profiling_timer(unsigned int multiplier)
 {
 	return -EINVAL;
 }
diff --git a/arch/parisc/kernel/time.c b/arch/parisc/kernel/time.c
index c3830400ca28..a1e772f909cb 100644
--- a/arch/parisc/kernel/time.c
+++ b/arch/parisc/kernel/time.c
@@ -205,7 +205,7 @@ static int __init rtc_init(void)
 device_initcall(rtc_init);
 #endif
 
-void read_persistent_clock(struct timespec *ts)
+void read_persistent_clock64(struct timespec64 *ts)
 {
 	static struct pdc_tod tod_data;
 	if (pdc_tod_read(&tod_data) == 0) {
diff --git a/arch/parisc/kernel/traps.c b/arch/parisc/kernel/traps.c
index c919e6c0a687..71d31274d782 100644
--- a/arch/parisc/kernel/traps.c
+++ b/arch/parisc/kernel/traps.c
@@ -627,9 +627,10 @@ void notrace handle_interruption(int code, struct pt_regs *regs)
 		   on condition  */
 		if(user_mode(regs)){
 			si.si_signo = SIGFPE;
-			/* Set to zero, and let the userspace app figure it out from
-			   the insn pointed to by si_addr */
-			si.si_code = FPE_FIXME;
+			/* Let userspace app figure it out from the insn pointed
+			 * to by si_addr.
+			 */
+			si.si_code = FPE_CONDTRAP;
 			si.si_addr = (void __user *) regs->iaoq[0];
 			force_sig_info(SIGFPE, &si, current);
 			return;
@@ -836,6 +837,17 @@ void __init initialize_ivt(const void *iva)
 	if (pdc_instr(&instr) == PDC_OK)
 		ivap[0] = instr;
 
+	/*
+	 * Rules for the checksum of the HPMC handler:
+	 * 1. The IVA does not point to PDC/PDH space (ie: the OS has installed
+	 *    its own IVA).
+	 * 2. The word at IVA + 32 is nonzero.
+	 * 3. If Length (IVA + 60) is not zero, then Length (IVA + 60) and
+	 *    Address (IVA + 56) are word-aligned.
+	 * 4. The checksum of the 8 words starting at IVA + 32 plus the sum of
+	 *    the Length/4 words starting at Address is zero.
+	 */
+
 	/* Compute Checksum for HPMC handler */
 	length = os_hpmc_size;
 	ivap[7] = length;
diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c
index cab32ee824d2..2607d2d33405 100644
--- a/arch/parisc/mm/init.c
+++ b/arch/parisc/mm/init.c
@@ -516,7 +516,7 @@ static void __init map_pages(unsigned long start_vaddr,
 	}
 }
 
-void free_initmem(void)
+void __ref free_initmem(void)
 {
 	unsigned long init_begin = (unsigned long)__init_begin;
 	unsigned long init_end = (unsigned long)__init_end;