blob: 13ea64cfd96dc354ad03be01c471ea5fd80a99be [file] [log] [blame]
#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);
#define __init __attribute__ ((__section__ (".text.init")))
#define __exit __attribute__ ((unused, __section__(".text.exit")))
#define __initdata __attribute__ ((__section__ (".data.init")))
#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 __attribute__ ((unused,__section__ (".uml.setup.init")))
#define __uml_setup_help __attribute__ ((unused,__section__ (".uml.help.init")))
#define __uml_init_call __attribute__ ((unused,__section__ (".uml.initcall.init")))
#define __uml_postsetup_call __attribute__ ((unused,__section__ (".uml.postsetup.init")))
#define __uml_exit_call __attribute__ ((unused,__section__ (".uml.exitcall.exit")))
#define __initcall(fn) static initcall_t __initcall_##fn __init_call = fn
#define __exitcall(fn) static exitcall_t __exitcall_##fn __exit_call = fn
#define __init_call __attribute__ ((unused,__section__ (".initcall.init")))
#define __exit_call __attribute__ ((unused,__section__ (".exitcall.exit")))
#endif /* _LINUX_UML_INIT_H */
/*
* Overrides for Emacs so that we follow Linus's tabbing style.
* Emacs will notice this stuff at the end of the file and automatically
* adjust the settings for this buffer only. This must remain at the end
* of the file.
* ---------------------------------------------------------------------------
* Local variables:
* c-file-style: "linux"
* End:
*/