move files_struct-related bits from kernel/exit.c to fs/file.c

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

1 files changed, 0 insertions, 93 deletions

diff --git a/kernel/exit.c b/kernel/exit.c
index f65345f9e5b..20dfc7617c2 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -466,99 +466,6 @@ void daemonize(const char *name, ...)
 
 EXPORT_SYMBOL(daemonize);
 
-static void close_files(struct files_struct * files)
-{
-	int i, j;
-	struct fdtable *fdt;
-
-	j = 0;
-
-	/*
-	 * It is safe to dereference the fd table without RCU or
-	 * ->file_lock because this is the last reference to the
-	 * files structure.  But use RCU to shut RCU-lockdep up.
-	 */
-	rcu_read_lock();
-	fdt = files_fdtable(files);
-	rcu_read_unlock();
-	for (;;) {
-		unsigned long set;
-		i = j * BITS_PER_LONG;
-		if (i >= fdt->max_fds)
-			break;
-		set = fdt->open_fds[j++];
-		while (set) {
-			if (set & 1) {
-				struct file * file = xchg(&fdt->fd[i], NULL);
-				if (file) {
-					filp_close(file, files);
-					cond_resched();
-				}
-			}
-			i++;
-			set >>= 1;
-		}
-	}
-}
-
-struct files_struct *get_files_struct(struct task_struct *task)
-{
-	struct files_struct *files;
-
-	task_lock(task);
-	files = task->files;
-	if (files)
-		atomic_inc(&files->count);
-	task_unlock(task);
-
-	return files;
-}
-
-void put_files_struct(struct files_struct *files)
-{
-	struct fdtable *fdt;
-
-	if (atomic_dec_and_test(&files->count)) {
-		close_files(files);
-		/*
-		 * Free the fd and fdset arrays if we expanded them.
-		 * If the fdtable was embedded, pass files for freeing
-		 * at the end of the RCU grace period. Otherwise,
-		 * you can free files immediately.
-		 */
-		rcu_read_lock();
-		fdt = files_fdtable(files);
-		if (fdt != &files->fdtab)
-			kmem_cache_free(files_cachep, files);
-		free_fdtable(fdt);
-		rcu_read_unlock();
-	}
-}
-
-void reset_files_struct(struct files_struct *files)
-{
-	struct task_struct *tsk = current;
-	struct files_struct *old;
-
-	old = tsk->files;
-	task_lock(tsk);
-	tsk->files = files;
-	task_unlock(tsk);
-	put_files_struct(old);
-}
-
-void exit_files(struct task_struct *tsk)
-{
-	struct files_struct * files = tsk->files;
-
-	if (files) {
-		task_lock(tsk);
-		tsk->files = NULL;
-		task_unlock(tsk);
-		put_files_struct(files);
-	}
-}
-
 #ifdef CONFIG_MM_OWNER
 /*
  * A task is exiting.   If it owned this mm, find a new owner for the mm.