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.