fs: move initializing f_mode before file_ref_init()

The comment above file_ref_init() says:
"We're SLAB_TYPESAFE_BY_RCU so initialize f_ref last."
but file_set_fsnotify_mode() was added after file_ref_init().

Move it right after setting f_mode, where it makes more sense.

Fixes: 711f9b8 ("fsnotify: disable pre-content and permission events by default")
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Link: https://patch.msgid.link/20260109211536.3565697-1-amir73il@gmail.com
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>

Author: amir73il

fs/file_table.c

@@ -176,6 +176,11 @@ static int init_file(struct file *f, int flags, const struct cred *cred)
 
 	f->f_flags	= flags;
 	f->f_mode	= OPEN_FMODE(flags);
+	/*
+	 * Disable permission and pre-content events for all files by default.
+	 * They may be enabled later by fsnotify_open_perm_and_set_mode().
+	 */
+	file_set_fsnotify_mode(f, FMODE_NONOTIFY_PERM);
 
 	f->f_op		= NULL;
 	f->f_mapping	= NULL;
@@ -197,11 +202,6 @@ static int init_file(struct file *f, int flags, const struct cred *cred)
 	 * refcount bumps we should reinitialize the reused file first.
 	 */
 	file_ref_init(&f->f_ref, 1);
-	/*
-	 * Disable permission and pre-content events for all files by default.
-	 * They may be enabled later by fsnotify_open_perm_and_set_mode().
-	 */
-	file_set_fsnotify_mode(f, FMODE_NONOTIFY_PERM);
 	return 0;
 }