Merge tag 'for-linus' of https://github.com/openrisc/linux

Pull OpenRISC updates from Stafford Horne:

 - Fixes from me to cleanup all compiler warnings reported under
   arch/openrisc

 - One cleanup from Linus Walleij to convert pfn macros to static
   inlines

* tag 'for-linus' of https://github.com/openrisc/linux:
  openrisc: Remove kernel-doc marker from ioremap comment
  openrisc: Remove unused tlb_init function
  openriac: Remove unused nommu_dump_state function
  openrisc: Include cpu.h and switch_to.h for prototypes
  openrisc: Add prototype for die to bug.h
  openrisc: Add prototype for show_registers to processor.h
  openrisc: Declare do_signal function as static
  openrisc: Add missing prototypes for assembly called fnctions
  openrisc: Make pfn accessors statics inlines

arch/openrisc/include/asm/bug.h

+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef __ASM_OPENRISC_BUG_H
+#define __ASM_OPENRISC_BUG_H
+
+#include <asm-generic/bug.h>
+
+struct pt_regs;
+
+void __noreturn die(const char *str, struct pt_regs *regs, long err);
+
+#endif /* __ASM_OPENRISC_BUG_H */

arch/openrisc/include/asm/page.h

@@ -72,8 +72,15 @@ typedef struct page *pgtable_t;
 #define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET))
 #define __pa(x) ((unsigned long) (x) - PAGE_OFFSET)
 
-#define virt_to_pfn(kaddr)      (__pa(kaddr) >> PAGE_SHIFT)
-#define pfn_to_virt(pfn)        __va((pfn) << PAGE_SHIFT)
+static inline unsigned long virt_to_pfn(const void *kaddr)
+{
+	return __pa(kaddr) >> PAGE_SHIFT;
+}
+
+static inline void * pfn_to_virt(unsigned long pfn)
+{
+	return (void *)((unsigned long)__va(pfn) << PAGE_SHIFT);
+}
 
 #define virt_to_page(addr) \
 	(mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))

arch/openrisc/include/asm/processor.h

@@ -73,6 +73,7 @@ struct thread_struct {
 
 void start_thread(struct pt_regs *regs, unsigned long nip, unsigned long sp);
 unsigned long __get_wchan(struct task_struct *p);
+void show_registers(struct pt_regs *regs);
 
 #define cpu_relax()     barrier()
 

arch/openrisc/kernel/process.c

@@ -14,6 +14,7 @@
  */
 
 #define __KERNEL_SYSCALLS__
+#include <linux/cpu.h>
 #include <linux/errno.h>
 #include <linux/sched.h>
 #include <linux/sched/debug.h>
@@ -38,6 +39,7 @@
 #include <asm/io.h>
 #include <asm/processor.h>
 #include <asm/spr_defs.h>
+#include <asm/switch_to.h>
 
 #include <linux/smp.h>
 
@@ -119,8 +121,6 @@ void flush_thread(void)
 
 void show_regs(struct pt_regs *regs)
 {
-	extern void show_registers(struct pt_regs *regs);
-
 	show_regs_print_info(KERN_DEFAULT);
 	/* __PHX__ cleanup this mess */
 	show_registers(regs);

arch/openrisc/kernel/ptrace.c

@@ -27,6 +27,10 @@
 #include <asm/thread_info.h>
 #include <asm/page.h>
 
+asmlinkage long do_syscall_trace_enter(struct pt_regs *regs);
+
+asmlinkage void do_syscall_trace_leave(struct pt_regs *regs);
+
 /*
  * Copy the thread state to a regset that can be interpreted by userspace.
  *

arch/openrisc/kernel/signal.c

@@ -34,6 +34,11 @@ struct rt_sigframe {
 	unsigned char retcode[16];	/* trampoline code */
 };
 
+asmlinkage long _sys_rt_sigreturn(struct pt_regs *regs);
+
+asmlinkage int do_work_pending(struct pt_regs *regs, unsigned int thread_flags,
+			       int syscall);
+
 static int restore_sigcontext(struct pt_regs *regs,
 			      struct sigcontext __user *sc)
 {
@@ -224,7 +229,7 @@ handle_signal(struct ksignal *ksig, struct pt_regs *regs)
  * mode below.
  */
 
-int do_signal(struct pt_regs *regs, int syscall)
+static int do_signal(struct pt_regs *regs, int syscall)
 {
 	struct ksignal ksig;
 	unsigned long continue_addr = 0;

arch/openrisc/kernel/smp.c

@@ -23,6 +23,8 @@
 #include <asm/cacheflush.h>
 #include <asm/time.h>
 
+asmlinkage __init void secondary_start_kernel(void);
+
 static void (*smp_cross_call)(const struct cpumask *, unsigned int);
 
 unsigned long secondary_release = -1;

arch/openrisc/kernel/time.c

@@ -25,6 +25,8 @@
 #include <asm/cpuinfo.h>
 #include <asm/time.h>
 
+irqreturn_t __irq_entry timer_interrupt(struct pt_regs *regs);
+
 /* Test the timer ticks to count, used in sync routine */
 inline void openrisc_timer_set(unsigned long count)
 {

arch/openrisc/kernel/traps.c

@@ -30,14 +30,23 @@
 #include <linux/kallsyms.h>
 #include <linux/uaccess.h>
 
+#include <asm/bug.h>
 #include <asm/io.h>
+#include <asm/processor.h>
 #include <asm/unwinder.h>
 #include <asm/sections.h>
 
-static int kstack_depth_to_print = 0x180;
 int lwa_flag;
 static unsigned long __user *lwa_addr;
 
+asmlinkage void unhandled_exception(struct pt_regs *regs, int ea, int vector);
+asmlinkage void do_trap(struct pt_regs *regs, unsigned long address);
+asmlinkage void do_fpe_trap(struct pt_regs *regs, unsigned long address);
+asmlinkage void do_unaligned_access(struct pt_regs *regs, unsigned long address);
+asmlinkage void do_bus_fault(struct pt_regs *regs, unsigned long address);
+asmlinkage void do_illegal_instruction(struct pt_regs *regs,
+				       unsigned long address);
+
 static void print_trace(void *data, unsigned long addr, int reliable)
 {
 	const char *loglvl = data;
@@ -143,80 +152,6 @@ void show_registers(struct pt_regs *regs)
 	printk("\n");
 }
 
-void nommu_dump_state(struct pt_regs *regs,
-		      unsigned long ea, unsigned long vector)
-{
-	int i;
-	unsigned long addr, stack = regs->sp;
-
-	printk("\n\r[nommu_dump_state] :: ea %lx, vector %lx\n\r", ea, vector);
-
-	printk("CPU #: %d\n"
-	       "   PC: %08lx    SR: %08lx    SP: %08lx\n",
-	       0, regs->pc, regs->sr, regs->sp);
-	printk("GPR00: %08lx GPR01: %08lx GPR02: %08lx GPR03: %08lx\n",
-	       0L, regs->gpr[1], regs->gpr[2], regs->gpr[3]);
-	printk("GPR04: %08lx GPR05: %08lx GPR06: %08lx GPR07: %08lx\n",
-	       regs->gpr[4], regs->gpr[5], regs->gpr[6], regs->gpr[7]);
-	printk("GPR08: %08lx GPR09: %08lx GPR10: %08lx GPR11: %08lx\n",
-	       regs->gpr[8], regs->gpr[9], regs->gpr[10], regs->gpr[11]);
-	printk("GPR12: %08lx GPR13: %08lx GPR14: %08lx GPR15: %08lx\n",
-	       regs->gpr[12], regs->gpr[13], regs->gpr[14], regs->gpr[15]);
-	printk("GPR16: %08lx GPR17: %08lx GPR18: %08lx GPR19: %08lx\n",
-	       regs->gpr[16], regs->gpr[17], regs->gpr[18], regs->gpr[19]);
-	printk("GPR20: %08lx GPR21: %08lx GPR22: %08lx GPR23: %08lx\n",
-	       regs->gpr[20], regs->gpr[21], regs->gpr[22], regs->gpr[23]);
-	printk("GPR24: %08lx GPR25: %08lx GPR26: %08lx GPR27: %08lx\n",
-	       regs->gpr[24], regs->gpr[25], regs->gpr[26], regs->gpr[27]);
-	printk("GPR28: %08lx GPR29: %08lx GPR30: %08lx GPR31: %08lx\n",
-	       regs->gpr[28], regs->gpr[29], regs->gpr[30], regs->gpr[31]);
-	printk("  RES: %08lx oGPR11: %08lx\n",
-	       regs->gpr[11], regs->orig_gpr11);
-
-	printk("Process %s (pid: %d, stackpage=%08lx)\n",
-	       ((struct task_struct *)(__pa(current)))->comm,
-	       ((struct task_struct *)(__pa(current)))->pid,
-	       (unsigned long)current);
-
-	printk("\nStack: ");
-	printk("Stack dump [0x%08lx]:\n", (unsigned long)stack);
-	for (i = 0; i < kstack_depth_to_print; i++) {
-		if (((long)stack & (THREAD_SIZE - 1)) == 0)
-			break;
-		stack++;
-
-		printk("%lx :: sp + %02d: 0x%08lx\n", stack, i * 4,
-		       *((unsigned long *)(__pa(stack))));
-	}
-	printk("\n");
-
-	printk("Call Trace:   ");
-	i = 1;
-	while (((long)stack & (THREAD_SIZE - 1)) != 0) {
-		addr = *((unsigned long *)__pa(stack));
-		stack++;
-
-		if (kernel_text_address(addr)) {
-			if (i && ((i % 6) == 0))
-				printk("\n ");
-			printk(" [<%08lx>]", addr);
-			i++;
-		}
-	}
-	printk("\n");
-
-	printk("\nCode: ");
-
-	for (i = -24; i < 24; i++) {
-		unsigned long word;
-
-		word = ((unsigned long *)(__pa(regs->pc)))[i];
-
-		print_data(regs->pc, word, i);
-	}
-	printk("\n");
-}
-
 /* This is normally the 'Oops' routine */
 void __noreturn die(const char *str, struct pt_regs *regs, long err)
 {

arch/openrisc/mm/fault.c

@@ -18,6 +18,7 @@
 #include <linux/perf_event.h>
 
 #include <linux/uaccess.h>
+#include <asm/bug.h>
 #include <asm/mmu_context.h>
 #include <asm/siginfo.h>
 #include <asm/signal.h>
@@ -30,7 +31,8 @@
  */
 volatile pgd_t *current_pgd[NR_CPUS];
 
-extern void __noreturn die(char *, struct pt_regs *, long);
+asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long address,
+			      unsigned long vector, int write_acc);
 
 /*
  * This routine handles page faults.  It determines the address,

arch/openrisc/mm/init.c

@@ -123,8 +123,6 @@ static void __init map_ram(void)
 
 void __init paging_init(void)
 {
-	extern void tlb_init(void);
-
 	int i;
 
 	printk(KERN_INFO "Setting up paging and PTEs.\n");

arch/openrisc/mm/ioremap.c

@@ -22,7 +22,7 @@
 
 extern int mem_init_done;
 
-/**
+/*
  * OK, this one's a bit tricky... ioremap can get called before memory is
  * initialized (early serial console does this) and will want to alloc a page
  * for its mapping.  No userspace pages will ever get allocated before memory

arch/openrisc/mm/tlb.c

@@ -182,12 +182,3 @@ void destroy_context(struct mm_struct *mm)
 	flush_tlb_mm(mm);
 
 }
-
-/* called once during VM initialization, from init.c */
-
-void __init tlb_init(void)
-{
-	/* Do nothing... */
-	/* invalidate the entire TLB */
-	/* flush_tlb_all(); */
-}