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#ifndef _LINUX_INIT_H
#define _LINUX_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;
* }
*
* Deprecated: you can surround the whole function declaration
* just before function body into __initfunc() macro, like:
*
* __initfunc (static void 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, ... };
*
* For initialized data not at file scope, i.e. within a function,
* you should use __initlocaldata instead, due to a bug in GCC 2.7.
*/
/*
* Disable the __initfunc macros if a file that is a part of a
* module attempts to use them. We do not want to interfere
* with module linking.
*/
#ifndef MODULE
#include <asm/init.h>
#else
#define __init
#define __initdata
#define __initfunc(__arginit) __arginit
/* For assembly routines */
#define __INIT
#define __FINIT
#define __INITDATA
#endif
#if (__GNUC__ > 2) || (__GNUC__ == 2 && __GNUC_MINOR__ >= 8)
#define __initlocaldata __initdata
#else
#define __initlocaldata
#endif
#ifndef __ASSEMBLY__
/*
* Used for kernel command line parameter setup
*/
struct new_kernel_param {
const char *str;
int (*setup_func)(char *);
};
extern struct new_kernel_param __setup_start, __setup_end;
#define __setup(str, fn) \
static char __setup_str_##fn[] __initdata = str; \
static struct new_kernel_param __setup_##fn __initsetup = { __setup_str_##fn, fn }
#define __initsetup __attribute__ ((unused,__section__ (".setup.init")))
/*
* Used for initialization calls..
*/
typedef int (*initcall_t)(void);
typedef void (*exitcall_t)(void);
#define __init_call __attribute__ ((unused,__section__ (".initcall.init")))
#define __exit_call __attribute__ ((unused,__section__ (".exitcall.exit")))
extern initcall_t __initcall_start, __initcall_end;
#define __initcall(fn) \
static initcall_t __initcall_##fn __init_call = fn
#define __exitcall(fn) \
static exitcall_t __exitcall_##fn __exit_call = fn
#ifdef MODULE
/* Not sure what version aliases were introduced in, but certainly in 2.91.66. */
#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 91)
/* These macros create a dummy inline: gcc 2.9x does not count alias
as usage, hence the `unused function' warning when __init functions
are declared static. We use the dummy __*_module_inline functions
both to kill the warning and check the type of the init/cleanup
function. */
typedef int (*__init_module_func_t)(void);
typedef void (*__cleanup_module_func_t)(void);
#define module_init(x) \
int init_module(void) __attribute__((alias(#x))); \
extern inline __init_module_func_t __init_module_inline(void) \
{ return x; }
#define module_exit(x) \
void cleanup_module(void) __attribute__((alias(#x))); \
extern inline __cleanup_module_func_t __cleanup_module_inline(void) \
{ return x; }
#else
#define module_init(x) int init_module(void) { return x(); }
#define module_exit(x) void cleanup_module(void) { x(); }
#endif
#else
#define module_init(x) __initcall(x);
#define module_exit(x) __exitcall(x);
#endif
#endif /* __ASSEMBLY __ */
#endif
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