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#ifndef _LINUX_INIT_H
#define _LINUX_INIT_H

#include <xen/config.h>
#include <asm/init.h>

/*
 * Mark functions and data as being only used at initialization
 * or exit time.
 */
#define __init       \
    __attribute__ ((__section__ (".init.text")))
#define __exit       \
    __attribute_used__ __attribute__ ((__section__(".exit.text")))
#define __initdata   \
    __attribute__ ((__section__ (".init.data")))
#define __exitdata   \
    __attribute_used__ __attribute__ ((__section__ (".exit.data")))
#define __initsetup  \
    __attribute_used__ __attribute__ ((__section__ (".init.setup")))
#define __init_call  \
    __attribute_used__ __attribute__ ((__section__ (".initcall1.init")))
#define __exit_call  \
    __attribute_used__ __attribute__ ((__section__ (".exitcall.exit")))

/* 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;