[PATCH v4 27/30] fs: Add iput() cleanup helper

[Mickaël Salaün]

Add a simple scope-based helper to put an inode reference, similar to
the fput() helper.

This is used in a following commit.

Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Christian Brauner <brauner@xxxxxxxxxx>
Cc: Jeff Layton <jlayton@xxxxxxxxxx>
Cc: Josef Bacik <josef@xxxxxxxxxxxxxx>
Signed-off-by: Mickaël Salaün <mic@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/20250108154338.1129069-28-mic@xxxxxxxxxxx
---

Changes since v3:
- New patch.
---
 include/linux/fs.h | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 7e29433c5ecc..bd5a28b0871f 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -47,6 +47,8 @@
 #include <linux/rw_hint.h>
 #include <linux/file_ref.h>
 #include <linux/unicode.h>
+#include <linux/cleanup.h>
+#include <linux/err.h>
 
 #include <asm/byteorder.h>
 #include <uapi/linux/fs.h>
@@ -2698,6 +2700,8 @@ extern void iput(struct inode *);
 int inode_update_timestamps(struct inode *inode, int flags);
 int generic_update_time(struct inode *, int);
 
+DEFINE_FREE(iput, struct inode *, if (!IS_ERR_OR_NULL(_T)) iput(_T))
+
 /* /sys/fs */
 extern struct kobject *fs_kobj;
 
@@ -3108,8 +3112,6 @@ static inline bool is_dot_dotdot(const char *name, size_t len)
 		(len == 1 || (len == 2 && name[1] == '.'));
 }
 
-#include <linux/err.h>
-
 /* needed for stackable file system support */
 extern loff_t default_llseek(struct file *file, loff_t offset, int whence);
 
-- 
2.47.1