m32r: use generic sys_pipe

m32r can use the generic sys_pipe implementation.

The current sys_pipe implementation on m32r only differes from the
generic one by passing a lot of additional unused registers to sys_pipe.

Reviewed and tested by Hirokazu Takata.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/m32r/kernel/sys_m32r.c

@@ -76,29 +76,6 @@ asmlinkage int sys_tas(int __user *addr)
 	return oldval;
 }
 
-/*
- * sys_pipe() is the normal C calling standard for creating
- * a pipe. It's not the way Unix traditionally does this, though.
- */
-asmlinkage int
-sys_pipe(unsigned long r0, unsigned long r1, unsigned long r2,
-	unsigned long r3, unsigned long r4, unsigned long r5,
-	unsigned long r6, struct pt_regs regs)
-{
-	int fd[2];
-	int error;
-
-	error = do_pipe(fd);
-	if (!error) {
-		if (copy_to_user((void __user *)r0, fd, 2*sizeof(int))) {
-			sys_close(fd[0]);
-			sys_close(fd[1]);
-			error = -EFAULT;
-		}
-	}
-	return error;
-}
-
 asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
 	unsigned long prot, unsigned long flags,
 	unsigned long fd, unsigned long pgoff)