linux-kernel - [RFC][PATCH 3/3] exec: Remove reset_files

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Date:   Sun, 16 Sep 2018 19:41:14 +0200
From:   ebiederm@...ssion.com (Eric W. Biederman)
To:     Jeff Layton <jlayton@...nel.org>
Cc:     viro@...iv.linux.org.uk, berrange@...hat.com,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        Oleg Nesterov <oleg@...hat.com>
Subject: [RFC][PATCH 3/3] exec: Remove reset_files_struct


Now that unshare_files is called after the point of no return there
are no more callers of reset_files_struct so remove it.

Signed-off-by: "Eric W. Biederman" <ebiederm@...ssion.com>
---
 fs/file.c               | 12 ------------
 include/linux/fdtable.h |  1 -
 2 files changed, 13 deletions(-)

diff --git a/fs/file.c b/fs/file.c
index 7ffd6e9d103d..eed29e034a47 100644
--- a/fs/file.c
+++ b/fs/file.c
@@ -422,18 +422,6 @@ 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 e65379336c4c..68858f620e87 100644
--- a/include/linux/fdtable.h
+++ b/include/linux/fdtable.h
@@ -107,7 +107,6 @@ 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 *, int *) __latent_entropy;
 void do_close_on_exec(struct files_struct *);
-- 
2.17.1