From 257b1c2c78c25643526609dee0c15f1544eb3252 Mon Sep 17 00:00:00 2001
From: Christian Brauner <brauner@kernel.org>
Date: Fri, 19 Jul 2024 13:41:51 +0200
Subject: [PATCH] file: add fput() cleanup helper

Add a simple helper to put a file reference.

Link: https://lore.kernel.org/r/20240719-work-mount-namespace-v1-4-834113cab0d2@kernel.org
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
---
 include/linux/file.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/linux/file.h b/include/linux/file.h
index 237931f20739..d1e768b06069 100644
--- a/include/linux/file.h
+++ b/include/linux/file.h
@@ -11,6 +11,7 @@
 #include <linux/posix_types.h>
 #include <linux/errno.h>
 #include <linux/cleanup.h>
+#include <linux/err.h>
 
 struct file;
 
@@ -96,6 +97,7 @@ extern void put_unused_fd(unsigned int fd);
 
 DEFINE_CLASS(get_unused_fd, int, if (_T >= 0) put_unused_fd(_T),
 	     get_unused_fd_flags(flags), unsigned flags)
+DEFINE_FREE(fput, struct file *, if (!IS_ERR_OR_NULL(_T)) fput(_T))
 
 /*
  * take_fd() will take care to set @fd to -EBADF ensuring that