Merge branch 'asm-generic-prototypes' into asm-generic

As part of my quest to enable -Wmissing-prototypes by default,
these patches clean up some of the prototypes that are needed by all
architectures but are handled inconsistently.

The duplicate prototypes are moved into common code, which helps both
to clean up the existing warnings and simplifies the logic.

* asm-generic-prototypes:
  arm64: vdso32: Define BUILD_VDSO32_64 to correct prototypes
  csky: fix arch_jump_label_transform_static override
  arch: add do_page_fault prototypes
  arch: add missing prepare_ftrace_return() prototypes
  arch: vdso: consolidate gettime prototypes
  arch: include linux/cpu.h for trap_init() prototype
  arch: fix asm-offsets.c building with -Wmissing-prototypes
  arch: consolidate arch_irq_work_raise prototypes

Author: arndb

arch/alpha/include/asm/mmu_context.h

@@ -183,6 +183,8 @@ ev4_switch_mm(struct mm_struct *prev_mm, struct mm_struct *next_mm,
 }
 
 extern void __load_new_mm_context(struct mm_struct *);
+asmlinkage void do_page_fault(unsigned long address, unsigned long mmcsr,
+			      long cause, struct pt_regs *regs);
 
 #ifdef CONFIG_SMP
 #define check_mmu_context()					\

arch/alpha/kernel/asm-offsets.c

@@ -12,7 +12,7 @@
 #include <linux/kbuild.h>
 #include <asm/io.h>
 
-void foo(void)
+static void __used foo(void)
 {
 	DEFINE(TI_TASK, offsetof(struct thread_info, task));
 	DEFINE(TI_FLAGS, offsetof(struct thread_info, flags));

arch/alpha/kernel/traps.c

@@ -9,6 +9,7 @@
  * This file initializes the trap entry points
  */
 
+#include <linux/cpu.h>
 #include <linux/jiffies.h>
 #include <linux/mm.h>
 #include <linux/sched/signal.h>

arch/arm/include/asm/irq_work.h

@@ -9,6 +9,4 @@ static inline bool arch_irq_work_has_interrupt(void)
 	return is_smp();
 }
 
-extern void arch_irq_work_raise(void);
-
 #endif /* _ASM_ARM_IRQ_WORK_H */

arch/arm/include/asm/vdso.h

@@ -24,11 +24,6 @@ static inline void arm_install_vdso(struct mm_struct *mm, unsigned long addr)
 
 #endif /* CONFIG_VDSO */
 
-int __vdso_clock_gettime(clockid_t clock, struct old_timespec32 *ts);
-int __vdso_clock_gettime64(clockid_t clock, struct __kernel_timespec *ts);
-int __vdso_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz);
-int __vdso_clock_getres(clockid_t clock_id, struct old_timespec32 *res);
-
 #endif /* __ASSEMBLY__ */
 
 #endif /* __KERNEL__ */

arch/arm/vdso/vgettimeofday.c

@@ -8,6 +8,7 @@
 #include <linux/types.h>
 #include <asm/vdso.h>
 #include <asm/unwind.h>
+#include <vdso/gettime.h>
 
 int __vdso_clock_gettime(clockid_t clock,
 			 struct old_timespec32 *ts)

arch/arm64/include/asm/irq_work.h

@@ -2,8 +2,6 @@
 #ifndef __ASM_IRQ_WORK_H
 #define __ASM_IRQ_WORK_H
 
-extern void arch_irq_work_raise(void);
-
 static inline bool arch_irq_work_has_interrupt(void)
 {
 	return true;

arch/arm64/kernel/vdso32/vgettimeofday.c

@@ -5,6 +5,8 @@
  * Copyright (C) 2018 ARM Limited
  *
  */
+#define BUILD_VDSO32_64
+#include <vdso/gettime.h>
 
 int __vdso_clock_gettime(clockid_t clock,
 			 struct old_timespec32 *ts)

arch/csky/include/asm/ftrace.h

@@ -26,5 +26,9 @@ static inline unsigned long ftrace_call_adjust(unsigned long addr)
 
 struct dyn_arch_ftrace {
 };
+
+void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr,
+			   unsigned long frame_pointer);
+
 #endif /* !__ASSEMBLY__ */
 #endif /* __ASM_CSKY_FTRACE_H */

arch/csky/include/asm/irq_work.h

@@ -7,5 +7,5 @@ static inline bool arch_irq_work_has_interrupt(void)
 {
 	return true;
 }
-extern void arch_irq_work_raise(void);
+
 #endif /* __ASM_CSKY_IRQ_WORK_H */