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Index: sys/compat/linuxkpi/common/include/linux/cleanup.h
===================================================================
--- sys/compat/linuxkpi/common/include/linux/cleanup.h
+++ sys/compat/linuxkpi/common/include/linux/cleanup.h
@@ -20,6 +20,32 @@
CLEANUP_NAME(_n, _t) _x __cleanup(CLEANUP_NAME(_n, _destroy)) = \
CLEANUP_NAME(_n, _create)
+/*
+ * On Linux, the following macro is called `DEFINE_CLASS()`. However it
+ * conflicts with FreeBSD's macro defined in <sys/kobj.h>.
+ *
+ * Note: "_T" are special as they are exposed into common code for
+ * statements. Extra care should be taken when changing the code.
+ */
+#define LINUXKPI_DEFINE_CLASS(_name, _type, _exit, _init, _init_args...)\
+ typedef _type class_##_name##_t; \
+ \
+ static inline _type class_##_name##_constructor(_init_args) \
+ { \
+ _type v = _init; \
+ return (v); \
+ } \
+ \
+ static inline void class_##_name##_destructor(_type *p) \
+ { \
+ _type _T = *p; \
+ _exit; \
+ }
+
+#define CLASS(_name, _var) \
+ class_##_name##_t _var __cleanup(class_##_name##_destructor) = \
+ class_##_name##_constructor
+
/*
* Note: "_T" are special as they are exposed into common code for
* statements. Extra care should be taken when changing the code.
Index: sys/compat/linuxkpi/common/include/linux/file.h
===================================================================
--- sys/compat/linuxkpi/common/include/linux/file.h
+++ sys/compat/linuxkpi/common/include/linux/file.h
@@ -184,6 +184,8 @@
return (struct fd){f};
}
+LINUXKPI_DEFINE_CLASS(fd, struct fd, fdput(_T), fdget(fd), int fd)
+
#define fd_file(fd) ((fd).linux_file)
static inline bool

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