arch/tile: Use <asm-generic/syscalls.h>

With this change we now include <asm-generic/syscalls.h> into the "tile"
version of the header.  To take full advantage of the prototypes there,
we also change our naming convention for "struct pt_regs *" syscalls so
that, e.g., _sys_execve() is the "true" syscall entry, which sets the
appropriate register to point to the pt_regs before calling sys_execve().

While doing this I realized I no longer needed the fork and vfork
entry point stubs, since those functions aren't in the generic
syscall ABI, so I removed them as well.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>

1 files changed, 11 insertions, 20 deletions

diff --git a/arch/tile/kernel/process.c b/arch/tile/kernel/process.c
index 84c29111756c..42ff73d5f637 100644
--- a/arch/tile/kernel/process.c
+++ b/arch/tile/kernel/process.c
@@ -528,14 +528,9 @@ struct task_struct *__sched _switch_to(struct task_struct *prev,
         return __switch_to(prev, next, next_current_ksp0(next));
 }
 
-long _sys_fork(struct pt_regs *regs)
-{
-        return do_fork(SIGCHLD, regs->sp, regs, 0, NULL, NULL);
-}
-
-long _sys_clone(unsigned long clone_flags, unsigned long newsp,
-                void __user *parent_tidptr, void __user *child_tidptr,
-                struct pt_regs *regs)
+SYSCALL_DEFINE5(clone, unsigned long, clone_flags, unsigned long, newsp,
+                void __user *, parent_tidptr, void __user *, child_tidptr,
+                struct pt_regs *, regs)
 {
         if (!newsp)
                 newsp = regs->sp;
@@ -543,18 +538,13 @@ long _sys_clone(unsigned long clone_flags, unsigned long newsp,
                        parent_tidptr, child_tidptr);
 }
 
-long _sys_vfork(struct pt_regs *regs)
-{
-        return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->sp,
-                       regs, 0, NULL, NULL);
-}
-
 /*
  * sys_execve() executes a new program.
  */
-long _sys_execve(const char __user *path,
-                 const char __user *const __user *argv,
-                 const char __user *const __user *envp, struct pt_regs *regs)
+SYSCALL_DEFINE4(execve, const char __user *, path,
+                const char __user *const __user *, argv,
+                const char __user *const __user *, envp,
+                struct pt_regs *, regs)
 {
         long error;
         char *filename;
@@ -570,9 +560,10 @@ out:
 }
 
 #ifdef CONFIG_COMPAT
-long _compat_sys_execve(const char __user *path,
-                        const compat_uptr_t __user *argv,
-                        const compat_uptr_t __user *envp, struct pt_regs *regs)
+long compat_sys_execve(const char __user *path,
+                       const compat_uptr_t __user *argv,
+                       const compat_uptr_t __user *envp,
+                       struct pt_regs *regs)
 {
         long error;
         char *filename;