m32r: switch to generic fork/vfork/clone

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

2 files changed, 7 insertions, 42 deletions

diff --git a/arch/m32r/include/asm/unistd.h b/arch/m32r/include/asm/unistd.h
index b27bdcbc7c2..d9e7351af2a 100644
--- a/arch/m32r/include/asm/unistd.h
+++ b/arch/m32r/include/asm/unistd.h
@@ -353,6 +353,9 @@
 #define __ARCH_WANT_SYS_RT_SIGACTION
 #define __ARCH_WANT_SYS_RT_SIGSUSPEND
 #define __ARCH_WANT_SYS_EXECVE
+#define __ARCH_WANT_SYS_CLONE
+#define __ARCH_WANT_SYS_FORK
+#define __ARCH_WANT_SYS_VFORK
 
 #define __IGNORE_lchown
 #define __IGNORE_setuid
diff --git a/arch/m32r/kernel/process.c b/arch/m32r/kernel/process.c
index 62c713f5694..c37e9a9a8f2 100644
--- a/arch/m32r/kernel/process.c
+++ b/arch/m32r/kernel/process.c
@@ -192,7 +192,7 @@ int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu)
 }
 
 int copy_thread(unsigned long clone_flags, unsigned long spu,
-        unsigned long arg, struct task_struct *tsk, struct pt_regs *regs)
+        unsigned long arg, struct task_struct *tsk, struct pt_regs *unused)
 {
         struct pt_regs *childregs = task_pt_regs(tsk);
         extern void ret_from_fork(void);
@@ -206,8 +206,9 @@ int copy_thread(unsigned long clone_flags, unsigned long spu,
                 tsk->thread.lr = (unsigned long)ret_from_kernel_thread;
         } else {
                 /* Copy registers */
-                *childregs = *regs;
-                childregs->spu = spu;
+                *childregs = *current_pt_regs();
+                if (spu)
+                        childregs->spu = spu;
                 childregs->r0 = 0;      /* Child gets zero as return value */
                 tsk->thread.lr = (unsigned long)ret_from_fork;
         }
@@ -216,45 +217,6 @@ int copy_thread(unsigned long clone_flags, unsigned long spu,
         return 0;
 }
 
-asmlinkage int sys_fork(void)
-{
-#ifdef CONFIG_MMU
-        struct pt_regs *regs = current_pt_regs();
-        return do_fork(SIGCHLD, regs->spu, regs, 0, NULL, NULL);
-#else
-        return -EINVAL;
-#endif /* CONFIG_MMU */
-}
-
-asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp,
-                         unsigned long parent_tidptr,
-                         unsigned long child_tidptr)
-{
-        struct pt_regs *regs = current_pt_regs();
-        if (!newsp)
-                newsp = regs->spu;
-
-        return do_fork(clone_flags, newsp, regs, 0,
-                       (int __user *)parent_tidptr, (int __user *)child_tidptr);
-}
-
-/*
- * This is trivial, and on the face of it looks like it
- * could equally well be done in user mode.
- *
- * Not so, for quite unobvious reasons - register pressure.
- * In user mode vfork() cannot have a stack frame, and if
- * done by calling the "clone()" system call directly, you
- * do not have enough call-clobbered registers to hold all
- * the information you need.
- */
-asmlinkage int sys_vfork(void)
-{
-        struct pt_regs *regs = current_pt_regs();
-        return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->spu, regs, 0,
-                        NULL, NULL);
-}
-
 /*
  * These bracket the sleeping functions..
  */