From: Christian Brauner <brauner@kernel.org>
Date: Fri, 11 Jul 2025 13:47:48 +0000 (+0200)
Subject: cleanup: add a scoped version of CLASS()
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5c21c5f22d0701ac6c1cafc0e8de4bf42e5c53e5;p=thirdparty%2Fkernel%2Fstable.git

cleanup: add a scoped version of CLASS()

This will make it possible to use:

scoped_class() {
}

constructs to limit variables to certain scopes and still perform
auto-cleanup.

Signed-off-by: Christian Brauner <brauner@kernel.org>
---

diff --git a/include/linux/cleanup.h b/include/linux/cleanup.h
index 7093e1d08af07..bee606bebaca3 100644
--- a/include/linux/cleanup.h
+++ b/include/linux/cleanup.h
@@ -277,6 +277,14 @@ static inline class_##_name##_t class_##_name##ext##_constructor(_init_args) \
 	class_##_name##_t var __cleanup(class_##_name##_destructor) =	\
 		class_##_name##_constructor
 
+#define scoped_class(_name, var, args)                          \
+	for (CLASS(_name, var)(args);                           \
+	     __guard_ptr(_name)(&var) || !__is_cond_ptr(_name); \
+	     ({ goto _label; }))                                \
+		if (0) {                                        \
+_label:                                                         \
+			break;                                  \
+		} else
 
 /*
  * DEFINE_GUARD(name, type, lock, unlock):