[PATCH][RFC] move close_range(2) into fs/file.c, fold __close_range() into it

[Al Viro <viro@zeniv.linux.org.uk>]

	We never had callers for __close_range() except for close_range(2)
itself.  Nothing of that sort has appeared in four years and if any users
do show up, we can always separate those suckers again.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
diff --git a/fs/file.c b/fs/file.c
index 8076aef9c210..f9fcebc7c838 100644
--- a/fs/file.c
+++ b/fs/file.c
@@ -732,7 +732,7 @@ static inline void __range_close(struct files_struct *files, unsigned int fd,
 }
 
 /**
- * __close_range() - Close all file descriptors in a given range.
+ * sys_close_range() - Close all file descriptors in a given range.
  *
  * @fd:     starting file descriptor to close
  * @max_fd: last file descriptor to close
@@ -740,8 +740,10 @@ static inline void __range_close(struct files_struct *files, unsigned int fd,
  *
  * This closes a range of file descriptors. All file descriptors
  * from @fd up to and including @max_fd are closed.
+ * Currently, errors to close a given file descriptor are ignored.
  */
-int __close_range(unsigned fd, unsigned max_fd, unsigned int flags)
+SYSCALL_DEFINE3(close_range, unsigned int, fd, unsigned int, max_fd,
+		unsigned int, flags)
 {
 	struct task_struct *me = current;
 	struct files_struct *cur_fds = me->files, *fds = NULL;
diff --git a/fs/open.c b/fs/open.c
index 89cafb572061..7ee11c4de4ca 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -1564,23 +1564,6 @@ SYSCALL_DEFINE1(close, unsigned int, fd)
 	return retval;
 }
 
-/**
- * sys_close_range() - Close all file descriptors in a given range.
- *
- * @fd:     starting file descriptor to close
- * @max_fd: last file descriptor to close
- * @flags:  reserved for future extensions
- *
- * This closes a range of file descriptors. All file descriptors
- * from @fd up to and including @max_fd are closed.
- * Currently, errors to close a given file descriptor are ignored.
- */
-SYSCALL_DEFINE3(close_range, unsigned int, fd, unsigned int, max_fd,
-		unsigned int, flags)
-{
-	return __close_range(fd, max_fd, flags);
-}
-
 /*
  * This routine simulates a hangup on the tty, to arrange that users
  * are given clean terminals at login time.
diff --git a/include/linux/fdtable.h b/include/linux/fdtable.h
index 2944d4aa413b..4e7d1bcca5b7 100644
--- a/include/linux/fdtable.h
+++ b/include/linux/fdtable.h
@@ -113,7 +113,6 @@ int iterate_fd(struct files_struct *, unsigned,
 		const void *);
 
 extern int close_fd(unsigned int fd);
-extern int __close_range(unsigned int fd, unsigned int max_fd, unsigned int flags);
 extern struct file *file_close_fd(unsigned int fd);
 extern int unshare_fd(unsigned long unshare_flags, unsigned int max_fds,
 		      struct files_struct **new_fdp);