init.h

来自「上一次项目的vivi 代码」· C头文件 代码 · 共 61 行

#ifndef _LINUX_INIT_H
#define _LINUX_INIT_H

#include <linux/config.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 __ASSEMBLY__

/*
 * Used for initialization calls..
 */
extern user_command_t   *__initcmd_start, *__initcmd_end;

#define __initcmd(cmd)								\
	user_command_t* __initcmd_##cmd __init_cmd = &cmd;

#endif /* __ASSEMBLY__ */

/*
 * Mark functions and data as being only used at initialization
 * or exit time.
 */
#define __init_cmd	__attribute__ ((__section__ (".cmd.init")))


#endif /* _LINUX_INIT_H */