Revert adding some arch-specific signal syscalls to <linux/syscalls.h>.

It turns out there is some variance on the calling conventions for
these syscalls, and <asm-generic/syscalls.h> is already the mechanism
used to handle this.  Switch arch/tile over to using that mechanism and
tweak the calling conventions for a couple of tile syscalls to match
<asm-generic/syscalls.h>.

Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>

arch/tile/include/asm/syscalls.h

@@ -22,21 +22,7 @@
 #include <linux/linkage.h>
 #include <linux/signal.h>
 #include <linux/types.h>
-
-/* kernel/process.c */
-int sys_fork(struct pt_regs *);
-int sys_vfork(struct pt_regs *);
-int sys_clone(unsigned long clone_flags, unsigned long newsp,
-	      int __user *parent_tidptr, int __user *child_tidptr,
-	      struct pt_regs *);
-int sys_execve(char __user *path, char __user *__user *argv,
-	       char __user *__user *envp, struct pt_regs *);
-
-/* kernel/signal.c */
-int sys_sigaltstack(const stack_t __user *, stack_t __user *,
-		    struct pt_regs *);
-long sys_rt_sigreturn(struct pt_regs *);
-int sys_raise_fpe(int code, unsigned long addr, struct pt_regs*);
+#include <asm-generic/syscalls.h>
 
 /* kernel/sys.c */
 ssize_t sys32_readahead(int fd, u32 offset_lo, u32 offset_hi, u32 count);
@@ -45,12 +31,6 @@ long sys32_fadvise64(int fd, u32 offset_lo, u32 offset_hi,
 int sys32_fadvise64_64(int fd, u32 offset_lo, u32 offset_hi,
 		       u32 len_lo, u32 len_hi, int advice);
 long sys_flush_cache(void);
-long sys_mmap(unsigned long addr, unsigned long len,
-	      unsigned long prot, unsigned long flags,
-	      unsigned long fd, unsigned long offset);
-long sys_mmap2(unsigned long addr, unsigned long len,
-	       unsigned long prot, unsigned long flags,
-	       unsigned long fd, unsigned long offset);
 
 #ifndef __tilegx__
 /* mm/fault.c */

arch/tile/kernel/process.c

@@ -502,7 +502,7 @@ int _sys_fork(struct pt_regs *regs)
 }
 
 int _sys_clone(unsigned long clone_flags, unsigned long newsp,
-	       int __user *parent_tidptr, int __user *child_tidptr,
+	       void __user *parent_tidptr, void __user *child_tidptr,
 	       struct pt_regs *regs)
 {
 	if (!newsp)

arch/tile/kernel/signal.c

@@ -43,7 +43,7 @@
 /* Caller before callee in this file; other callee is in assembler */
 void do_signal(struct pt_regs *regs);
 
-int _sys_sigaltstack(const stack_t __user *uss,
+long _sys_sigaltstack(const stack_t __user *uss,
                       stack_t __user *uoss, struct pt_regs *regs)
 {
 	return do_sigaltstack(uss, uoss, regs->sp);

arch/tile/kernel/sys.c

@@ -95,7 +95,7 @@ SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len,
  */
 SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len,
 		unsigned long, prot, unsigned long, flags,
-		unsigned long, fd, unsigned long, offset)
+		unsigned long, fd, off_t, offset)
 {
 	if (offset & ((1 << PAGE_SHIFT) - 1))
 		return -EINVAL;

include/linux/syscalls.h

@@ -364,13 +364,9 @@ asmlinkage long sys_init_module(void __user *umod, unsigned long len,
 asmlinkage long sys_delete_module(const char __user *name_user,
 				unsigned int flags);
 
-asmlinkage long sys_rt_sigaction(int sig, const struct sigaction __user *act,
-				 struct sigaction __user *oact,
-				 size_t sigsetsize);
 asmlinkage long sys_rt_sigprocmask(int how, sigset_t __user *set,
 				sigset_t __user *oset, size_t sigsetsize);
 asmlinkage long sys_rt_sigpending(sigset_t __user *set, size_t sigsetsize);
-asmlinkage long sys_rt_sigsuspend(sigset_t __user *unewset, size_t sigsetsize);
 asmlinkage long sys_rt_sigtimedwait(const sigset_t __user *uthese,
 				siginfo_t __user *uinfo,
 				const struct timespec __user *uts,