exec: Remove reset_files_struct

Now that exec no longer needs to restore the previous value of current->files
on error there are no more callers of reset_files_struct so remove it.

Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
v1: https://lkml.kernel.org/r/20200817220425.9389-3-ebiederm@xmission.com
Link: https://lkml.kernel.org/r/20201120231441.29911-3-ebiederm@xmission.com
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>

diff --git a/fs/file.c b/fs/file.c
index 4559b5f..beae7c5 100644 (file)
--- a/fs/file.c
+++ b/fs/file.c
@@ -436,18 +436,6 @@ void put_files_struct(struct files_struct *files)
        }
 }
 
-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;

diff --git a/include/linux/fdtable.h b/include/linux/fdtable.h
index f46a084..7cc9885 100644 (file)
--- a/include/linux/fdtable.h
+++ b/include/linux/fdtable.h
@@ -108,7 +108,6 @@ struct task_struct;
 
 struct files_struct *get_files_struct(struct task_struct *);
 void put_files_struct(struct files_struct *fs);
-void reset_files_struct(struct files_struct *);
 int unshare_files(void);
 struct files_struct *dup_fd(struct files_struct *, unsigned, int *) __latent_entropy;
 void do_close_on_exec(struct files_struct *);