powerpc: Move C prototypes out of asm-prototypes.h

We originally added asm-prototypes.h in commit 42f5b4c ("powerpc:
Introduce asm-prototypes.h"). It's purpose was for prototypes of C
functions that are only called from asm, in order to fix sparse
warnings about missing prototypes.

A few months later Nick added a different use case in
commit 4efca4e ("kbuild: modversions for EXPORT_SYMBOL() for asm")
for C prototypes for exported asm functions. This is basically the
inverse of our original usage.

Since then we've added various prototypes to asm-prototypes.h for both
reasons, meaning we now need to unstitch it all.

Dispatch prototypes of C functions into relevant headers and keep
only the prototypes for functions defined in assembly.

For the time being, leave prom_init() there because moving it
into asm/prom.h or asm/setup.h conflicts with
drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowrom.o
This will be fixed later by untaggling asm/pci.h and asm/prom.h
or by renaming the function in shadowrom.c

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/62d46904eca74042097acf4cb12c175e3067f3d1.1646413435.git.christophe.leroy@csgroup.eu

Author: chleroy

arch/powerpc/include/asm/asm-prototypes.h

@@ -19,19 +19,6 @@
 
 #include <uapi/asm/ucontext.h>
 
-/* SMP */
-extern struct task_struct *secondary_current;
-void start_secondary(void *unused);
-
-/* kexec */
-struct kimage;
-void kexec_copy_flush(struct kimage *image);
-
-/* pseries hcall tracing */
-extern struct static_key hcall_tracepoint_key;
-void __trace_hcall_entry(unsigned long opcode, unsigned long *args);
-void __trace_hcall_exit(long opcode, long retval, unsigned long *retbuf);
-
 /* Ultravisor */
 #if defined(CONFIG_PPC_POWERNV) || defined(CONFIG_PPC_SVM)
 long ucall_norets(unsigned long opcode, ...);
@@ -47,43 +34,12 @@ int64_t __opal_call(int64_t a0, int64_t a1, int64_t a2, int64_t a3,
 		    int64_t a4, int64_t a5, int64_t a6, int64_t a7,
 		    int64_t opcode, uint64_t msr);
 
-/* VMX copying */
-int enter_vmx_usercopy(void);
-int exit_vmx_usercopy(void);
-int enter_vmx_ops(void);
-void *exit_vmx_ops(void *dest);
-
-/* signals, syscalls and interrupts */
-#ifdef CONFIG_PPC32
-int
-ppc_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp,
-	   struct __kernel_old_timeval __user *tvp);
-unsigned long __init early_init(unsigned long dt_ptr);
-void __init machine_init(u64 dt_ptr);
-#endif
-long system_call_exception(long r3, long r4, long r5, long r6, long r7, long r8, unsigned long r0, struct pt_regs *regs);
-notrace unsigned long syscall_exit_prepare(unsigned long r3, struct pt_regs *regs, long scv);
-notrace unsigned long interrupt_exit_user_prepare(struct pt_regs *regs);
-notrace unsigned long interrupt_exit_kernel_prepare(struct pt_regs *regs);
-#ifdef CONFIG_PPC64
-unsigned long syscall_exit_restart(unsigned long r3, struct pt_regs *regs);
-unsigned long interrupt_exit_user_restart(struct pt_regs *regs);
-unsigned long interrupt_exit_kernel_restart(struct pt_regs *regs);
-#endif
-
-long ppc_fadvise64_64(int fd, int advice, u32 offset_high, u32 offset_low,
-		      u32 len_high, u32 len_low);
-
 /* prom_init (OpenFirmware) */
 unsigned long __init prom_init(unsigned long r3, unsigned long r4,
 			       unsigned long pp,
 			       unsigned long r6, unsigned long r7,
 			       unsigned long kbase);
 
-/* setup */
-void __init early_setup(unsigned long dt_ptr);
-void early_setup_secondary(void);
-
 /* misc runtime */
 extern u64 __bswapdi2(u64);
 extern s64 __lshrdi3(s64, int);
@@ -94,11 +50,6 @@ extern int __ucmpdi2(u64, u64);
 
 /* tracing */
 void _mcount(void);
-unsigned long prepare_ftrace_return(unsigned long parent, unsigned long ip,
-						unsigned long sp);
-
-void pnv_power9_force_smt4_catch(void);
-void pnv_power9_force_smt4_release(void);
 
 /* Transaction memory related */
 void tm_enable(void);

arch/powerpc/include/asm/ftrace.h

@@ -19,6 +19,9 @@ static inline unsigned long ftrace_call_adjust(unsigned long addr)
        return addr;
 }
 
+unsigned long prepare_ftrace_return(unsigned long parent, unsigned long ip,
+				    unsigned long sp);
+
 struct dyn_arch_ftrace {
 	struct module *mod;
 };

arch/powerpc/include/asm/hvcall.h

@@ -501,6 +501,11 @@ long plpar_hcall_raw(unsigned long opcode, unsigned long *retbuf, ...);
 long plpar_hcall9(unsigned long opcode, unsigned long *retbuf, ...);
 long plpar_hcall9_raw(unsigned long opcode, unsigned long *retbuf, ...);
 
+/* pseries hcall tracing */
+extern struct static_key hcall_tracepoint_key;
+void __trace_hcall_entry(unsigned long opcode, unsigned long *args);
+void __trace_hcall_exit(long opcode, long retval, unsigned long *retbuf);
+
 struct hvcall_mpp_data {
 	unsigned long entitled_mem;
 	unsigned long mapped_mem;

arch/powerpc/include/asm/interrupt.h

@@ -636,6 +636,17 @@ static inline void interrupt_cond_local_irq_enable(struct pt_regs *regs)
 		local_irq_enable();
 }
 
+long system_call_exception(long r3, long r4, long r5, long r6, long r7, long r8,
+			   unsigned long r0, struct pt_regs *regs);
+notrace unsigned long syscall_exit_prepare(unsigned long r3, struct pt_regs *regs, long scv);
+notrace unsigned long interrupt_exit_user_prepare(struct pt_regs *regs);
+notrace unsigned long interrupt_exit_kernel_prepare(struct pt_regs *regs);
+#ifdef CONFIG_PPC64
+unsigned long syscall_exit_restart(unsigned long r3, struct pt_regs *regs);
+unsigned long interrupt_exit_user_restart(struct pt_regs *regs);
+unsigned long interrupt_exit_kernel_restart(struct pt_regs *regs);
+#endif
+
 #endif /* __ASSEMBLY__ */
 
 #endif /* _ASM_POWERPC_INTERRUPT_H */

arch/powerpc/include/asm/kexec.h

@@ -96,6 +96,8 @@ static inline bool kdump_in_progress(void)
 void relocate_new_kernel(unsigned long indirection_page, unsigned long reboot_code_buffer,
 			 unsigned long start_address) __noreturn;
 
+void kexec_copy_flush(struct kimage *image);
+
 #ifdef CONFIG_KEXEC_FILE
 extern const struct kexec_file_ops kexec_elf64_ops;
 

arch/powerpc/include/asm/processor.h

@@ -411,6 +411,8 @@ extern int powersave_nap;	/* set if nap mode can be used in idle loop */
 extern void power7_idle_type(unsigned long type);
 extern void arch300_idle_type(unsigned long stop_psscr_val,
 			      unsigned long stop_psscr_mask);
+void pnv_power9_force_smt4_catch(void);
+void pnv_power9_force_smt4_release(void);
 
 extern int fix_alignment(struct pt_regs *);
 
@@ -427,6 +429,12 @@ extern int fix_alignment(struct pt_regs *);
 
 int do_mathemu(struct pt_regs *regs);
 
+/* VMX copying */
+int enter_vmx_usercopy(void);
+int exit_vmx_usercopy(void);
+int enter_vmx_ops(void);
+void *exit_vmx_ops(void *dest);
+
 #endif /* __KERNEL__ */
 #endif /* __ASSEMBLY__ */
 #endif /* _ASM_POWERPC_PROCESSOR_H */

arch/powerpc/include/asm/setup.h

@@ -76,6 +76,13 @@ static inline void setup_spectre_v2(void) {}
 #endif
 void __init do_btb_flush_fixups(void);
 
+#ifdef CONFIG_PPC32
+unsigned long __init early_init(unsigned long dt_ptr);
+void __init machine_init(u64 dt_ptr);
+#endif
+void __init early_setup(unsigned long dt_ptr);
+void early_setup_secondary(void);
+
 #endif /* !__ASSEMBLY__ */
 
 #endif	/* _ASM_POWERPC_SETUP_H */

arch/powerpc/include/asm/smp.h

@@ -60,6 +60,9 @@ struct smp_ops_t {
 #endif
 };
 
+extern struct task_struct *secondary_current;
+
+void start_secondary(void *unused);
 extern int smp_send_nmi_ipi(int cpu, void (*fn)(struct pt_regs *), u64 delay_us);
 extern int smp_send_safe_nmi_ipi(int cpu, void (*fn)(struct pt_regs *), u64 delay_us);
 extern void smp_send_debugger_break(void);

arch/powerpc/include/asm/syscalls.h

@@ -18,6 +18,10 @@ asmlinkage long sys_mmap2(unsigned long addr, size_t len,
 		unsigned long fd, unsigned long pgoff);
 asmlinkage long ppc64_personality(unsigned long personality);
 asmlinkage long sys_rtas(struct rtas_args __user *uargs);
+int ppc_select(int n, fd_set __user *inp, fd_set __user *outp,
+	       fd_set __user *exp, struct __kernel_old_timeval __user *tvp);
+long ppc_fadvise64_64(int fd, int advice, u32 offset_high, u32 offset_low,
+		      u32 len_high, u32 len_low);
 
 #ifdef CONFIG_COMPAT
 unsigned long compat_sys_mmap2(unsigned long addr, size_t len,

arch/powerpc/kernel/early_32.c

@@ -8,7 +8,6 @@
 #include <linux/kernel.h>
 #include <asm/setup.h>
 #include <asm/sections.h>
-#include <asm/asm-prototypes.h>
 
 /*
  * We're called here very early in the boot.