1 files changed, 151 insertions, 0 deletions

diff --git a/arch/um/include/shared/init.h b/arch/um/include/shared/init.h
new file mode 100644
index 000000000000..37dd097c16c0
--- /dev/null
+++ b/arch/um/include/shared/init.h
@@ -0,0 +1,151 @@
+#ifndef _LINUX_UML_INIT_H
+#define _LINUX_UML_INIT_H
+
+/* These macros are used to mark some functions or
+ * initialized data (doesn't apply to uninitialized data)
+ * as `initialization' functions. The kernel can take this
+ * as hint that the function is used only during the initialization
+ * phase and free up used memory resources after
+ *
+ * Usage:
+ * For functions:
+ *
+ * You should add __init immediately before the function name, like:
+ *
+ * static void __init initme(int x, int y)
+ * {
+ *    extern int z; z = x * y;
+ * }
+ *
+ * If the function has a prototype somewhere, you can also add
+ * __init between closing brace of the prototype and semicolon:
+ *
+ * extern int initialize_foobar_device(int, int, int) __init;
+ *
+ * For initialized data:
+ * You should insert __initdata between the variable name and equal
+ * sign followed by value, e.g.:
+ *
+ * static int init_variable __initdata = 0;
+ * static char linux_logo[] __initdata = { 0x32, 0x36, ... };
+ *
+ * Don't forget to initialize data not at file scope, i.e. within a function,
+ * as gcc otherwise puts the data into the bss section and not into the init
+ * section.
+ *
+ * Also note, that this data cannot be "const".
+ */
+
+#ifndef _LINUX_INIT_H
+typedef int (*initcall_t)(void);
+typedef void (*exitcall_t)(void);
+
+#ifndef __KERNEL__
+#ifndef __section
+# define __section(S) __attribute__ ((__section__(#S)))
+#endif
+
+#if __GNUC__ == 3
+
+#if __GNUC_MINOR__ >= 3
+# define __used                 __attribute__((__used__))
+#else
+# define __used                 __attribute__((__unused__))
+#endif
+
+#else
+#if __GNUC__ == 4
+# define __used                 __attribute__((__used__))
+#endif
+#endif
+
+#else
+#include <linux/compiler.h>
+#endif
+/* These are for everybody (although not all archs will actually
+   discard it in modules) */
+#define __init          __section(.init.text)
+#define __initdata      __section(.init.data)
+#define __exitdata      __section(.exit.data)
+#define __exit_call     __used __section(.exitcall.exit)
+
+#ifdef MODULE
+#define __exit          __section(.exit.text)
+#else
+#define __exit          __used __section(.exit.text)
+#endif
+
+#endif
+
+#ifndef MODULE
+struct uml_param {
+        const char *str;
+        int (*setup_func)(char *, int *);
+};
+
+extern initcall_t __uml_initcall_start, __uml_initcall_end;
+extern initcall_t __uml_postsetup_start, __uml_postsetup_end;
+extern const char *__uml_help_start, *__uml_help_end;
+#endif
+
+#define __uml_initcall(fn)                                              \
+        static initcall_t __uml_initcall_##fn __uml_init_call = fn
+
+#define __uml_exitcall(fn)                                              \
+        static exitcall_t __uml_exitcall_##fn __uml_exit_call = fn
+
+extern struct uml_param __uml_setup_start, __uml_setup_end;
+
+#define __uml_postsetup(fn)                                             \
+        static initcall_t __uml_postsetup_##fn __uml_postsetup_call = fn
+
+#define __non_empty_string(dummyname,string)                            \
+        struct __uml_non_empty_string_struct_##dummyname                \
+        {                                                               \
+                char _string[sizeof(string)-2];                         \
+        }
+
+#ifndef MODULE
+#define __uml_setup(str, fn, help...)                                   \
+        __non_empty_string(fn ##_setup, str);                           \
+        __uml_help(fn, help);                                           \
+        static char __uml_setup_str_##fn[] __initdata = str;            \
+        static struct uml_param __uml_setup_##fn __uml_init_setup = { __uml_setup_str_##fn, fn }
+#else
+#define __uml_setup(str, fn, help...)                                   \
+
+#endif
+
+#define __uml_help(fn, help...)                                         \
+        __non_empty_string(fn ##__help, help);                          \
+        static char __uml_help_str_##fn[] __initdata = help;            \
+        static const char *__uml_help_##fn __uml_setup_help = __uml_help_str_##fn
+
+/*
+ * Mark functions and data as being only used at initialization
+ * or exit time.
+ */
+#define __uml_init_setup        __used __section(.uml.setup.init)
+#define __uml_setup_help        __used __section(.uml.help.init)
+#define __uml_init_call         __used __section(.uml.initcall.init)
+#define __uml_postsetup_call    __used __section(.uml.postsetup.init)
+#define __uml_exit_call         __used __section(.uml.exitcall.exit)
+
+#ifndef __KERNEL__
+
+#define __define_initcall(level,fn) \
+        static initcall_t __initcall_##fn __used \
+        __attribute__((__section__(".initcall" level ".init"))) = fn
+
+/* Userspace initcalls shouldn't depend on anything in the kernel, so we'll
+ * make them run first.
+ */
+#define __initcall(fn) __define_initcall("1", fn)
+
+#define __exitcall(fn) static exitcall_t __exitcall_##fn __exit_call = fn
+
+#define __init_call     __used __section(.initcall.init)
+
+#endif
+
+#endif /* _LINUX_UML_INIT_H */