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#ifndef _LINUX_INIT_H

#define _LINUX_INIT_H

#include <linux/compiler.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".

 */

/* These are for everybody (although not all archs will actually

   discard it in modules) */

#define __init          __attribute__ ((__section__ (".init.text"))) __cold

#define __initdata      __attribute__ ((__section__ (".init.data")))

#define __exitdata      __attribute__ ((__section__(".exit.data")))

#define __exit_call     __attribute_used__ __attribute__ ((__section__ (".exitcall.exit")))

/* modpost check for section mismatches during the kernel build.

 * A section mismatch happens when there are references from a

 * code or data section to an init section (both code or data).

 * The init sections are (for most archs) discarded by the kernel

 * when early init has completed so all such references are potential bugs.

 * For exit sections the same issue exists.

 * The following markers are used for the cases where the reference to

 * the init/exit section (code or data) is valid and will teach modpost

 * not to issue a warning.

 * The markers follow same syntax rules as __init / __initdata. */

#define __init_refok     noinline __attribute__ ((__section__ (".text.init.refok")))

#define __initdata_refok          __attribute__ ((__section__ (".data.init.refok")))

#define __exit_refok     noinline __attribute__ ((__section__ (".exit.text.refok")))

#ifdef MODULE

#define __exit          __attribute__ ((__section__(".exit.text"))) __cold

#else

#define __exit          __attribute_used__ __attribute__ ((__section__(".exit.text"))) __cold

#endif

/* For assembly routines */

#define __INIT          .section        ".init.text","ax"

#define __INIT_REFOK    .section        ".text.init.refok","ax"

#define __FINIT         .previous

#define __INITDATA      .section        ".init.data","aw"

#define __INITDATA_REFOK .section       ".data.init.refok","aw"

#ifndef __ASSEMBLY__

/*

 * Used for initialization calls..

 */

typedef int (*initcall_t)(void);

typedef void (*exitcall_t)(void);

extern initcall_t __con_initcall_start[], __con_initcall_end[];

extern initcall_t __security_initcall_start[], __security_initcall_end[];

/* Defined in init/main.c */

extern char __initdata boot_command_line[];

extern char *saved_command_line;

extern unsigned int reset_devices;

/* used by init/main.c */

void setup_arch(char **);

void prepare_namespace(void);

#endif

#ifndef MODULE

#ifndef __ASSEMBLY__

/* initcalls are now grouped by functionality into separate

 * subsections. Ordering inside the subsections is determined

 * by link order.

 * For backwards compatibility, initcall() puts the call in

 * the device init subsection.

 *

 * The `id' arg to __define_initcall() is needed so that multiple initcalls

 * can point at the same handler without causing duplicate-symbol build errors.

 */

#define __define_initcall(level,fn,id) \

        static initcall_t __initcall_##fn##id __attribute_used__ \

        __attribute__((__section__(".initcall" level ".init"))) = fn

/*

 * A "pure" initcall has no dependencies on anything else, and purely

 * initializes variables that couldn't be statically initialized.

 *

 * This only exists for built-in code, not for modules.

 */

#define pure_initcall(fn)               __define_initcall("0",fn,0)

#define core_initcall(fn)               __define_initcall("1",fn,1)

#define core_initcall_sync(fn)          __define_initcall("1s",fn,1s)

#define postcore_initcall(fn)           __define_initcall("2",fn,2)

#define postcore_initcall_sync(fn)      __define_initcall("2s",fn,2s)

#define arch_initcall(fn)               __define_initcall("3",fn,3)

#define arch_initcall_sync(fn)          __define_initcall("3s",fn,3s)

#define subsys_initcall(fn)             __define_initcall("4",fn,4)

#define subsys_initcall_sync(fn)        __define_initcall("4s",fn,4s)

#define fs_initcall(fn)                 __define_initcall("5",fn,5)

#define fs_initcall_sync(fn)            __define_initcall("5s",fn,5s)

#define rootfs_initcall(fn)             __define_initcall("rootfs",fn,rootfs)

#define device_initcall(fn)             __define_initcall("6",fn,6)

#define device_initcall_sync(fn)        __define_initcall("6s",fn,6s)

#define late_initcall(fn)               __define_initcall("7",fn,7)

#define late_initcall_sync(fn)          __define_initcall("7s",fn,7s)

#define __initcall(fn) device_initcall(fn)

#define __exitcall(fn) \

        static exitcall_t __exitcall_##fn __exit_call = fn

#define console_initcall(fn) \

        static initcall_t __initcall_##fn \

        __attribute_used__ __attribute__((__section__(".con_initcall.init")))=fn

#define security_initcall(fn) \

        static initcall_t __initcall_##fn \

        __attribute_used__ __attribute__((__section__(".security_initcall.init"))) = fn

struct obs_kernel_param {

        const char *str;

        int (*setup_func)(char *);

        int early;

};

/*

 * Only for really core code.  See moduleparam.h for the normal way.

 *

 * Force the alignment so the compiler doesn't space elements of the

 * obs_kernel_param "array" too far apart in .init.setup.

 */

#define __setup_param(str, unique_id, fn, early)                        \

        static char __setup_str_##unique_id[] __initdata __aligned(1) = str; \

        static struct obs_kernel_param __setup_##unique_id      \

                __attribute_used__                              \

                __attribute__((__section__(".init.setup")))     \

                __attribute__((aligned((sizeof(long)))))        \

                = { __setup_str_##unique_id, fn, early }

#define __setup_null_param(str, unique_id)                      \

        __setup_param(str, unique_id, NULL, 0)

#define __setup(str, fn)                                        \

        __setup_param(str, fn, fn, 0)

/* NOTE: fn is as per module_param, not __setup!  Emits warning if fn

 * returns non-zero. */

#define early_param(str, fn)                                    \

        __setup_param(str, fn, fn, 1)

/* Relies on boot_command_line being set */

void __init parse_early_param(void);

#endif /* __ASSEMBLY__ */

/**

 * module_init() - driver initialization entry point

 * @x: function to be run at kernel boot time or module insertion

 *

 * module_init() will either be called during do_initcalls() (if

 * builtin) or at module insertion time (if a module).  There can only

 * be one per module.

 */

#define module_init(x)  __initcall(x);

/**

 * module_exit() - driver exit entry point

 * @x: function to be run when driver is removed

 *

 * module_exit() will wrap the driver clean-up code

 * with cleanup_module() when used with rmmod when

 * the driver is a module.  If the driver is statically

 * compiled into the kernel, module_exit() has no effect.

 * There can only be one per module.

 */

#define module_exit(x)  __exitcall(x);

#else /* MODULE */

/* Don't use these in modules, but some people do... */

#define core_initcall(fn)               module_init(fn)

#define postcore_initcall(fn)           module_init(fn)

#define arch_initcall(fn)               module_init(fn)

#define subsys_initcall(fn)             module_init(fn)

#define fs_initcall(fn)                 module_init(fn)

#define device_initcall(fn)             module_init(fn)

#define late_initcall(fn)               module_init(fn)

#define security_initcall(fn)           module_init(fn)

/* 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. */

/* Each module must use one module_init(), or one no_module_init */

#define module_init(initfn)                                     \

        static inline initcall_t __inittest(void)               \

        { return initfn; }                                      \

        int init_module(void) __attribute__((alias(#initfn)));

/* This is only required if you want to be unloadable. */

#define module_exit(exitfn)                                     \

        static inline exitcall_t __exittest(void)               \

        { return exitfn; }                                      \

        void cleanup_module(void) __attribute__((alias(#exitfn)));

#define __setup_param(str, unique_id, fn)       /* nothing */

#define __setup_null_param(str, unique_id)      /* nothing */

#define __setup(str, func)                      /* nothing */

#endif

/* Data marked not to be saved by software suspend */

#define __nosavedata __attribute__ ((__section__ (".data.nosave")))

/* This means "can be init if no module support, otherwise module load

   may call it." */

#ifdef CONFIG_MODULES

#define __init_or_module

#define __initdata_or_module

#else

#define __init_or_module __init

#define __initdata_or_module __initdata

#endif /*CONFIG_MODULES*/

#ifdef CONFIG_HOTPLUG

#define __devinit

#define __devinitdata

#define __devexit

#define __devexitdata

#else

#define __devinit __init

#define __devinitdata __initdata

#define __devexit __exit

#define __devexitdata __exitdata

#endif

#ifdef CONFIG_HOTPLUG_CPU

#define __cpuinit

#define __cpuinitdata

#define __cpuexit

#define __cpuexitdata

#else

#define __cpuinit       __init

#define __cpuinitdata __initdata

#define __cpuexit __exit

#define __cpuexitdata   __exitdata

#endif

#if defined(CONFIG_MEMORY_HOTPLUG) || defined(CONFIG_ACPI_HOTPLUG_MEMORY) \

        || defined(CONFIG_ACPI_HOTPLUG_MEMORY_MODULE)

#define __meminit

#define __meminitdata

#define __memexit

#define __memexitdata

#else

#define __meminit       __init

#define __meminitdata __initdata

#define __memexit __exit

#define __memexitdata   __exitdata

#endif

/* Functions marked as __devexit may be discarded at kernel link time, depending

   on config options.  Newer versions of binutils detect references from

   retained sections to discarded sections and flag an error.  Pointers to

   __devexit functions must use __devexit_p(function_name), the wrapper will

   insert either the function_name or NULL, depending on the config options.

 */

#if defined(MODULE) || defined(CONFIG_HOTPLUG)

#define __devexit_p(x) x

#else

#define __devexit_p(x) NULL

#endif

#ifdef MODULE

#define __exit_p(x) x

#else

#define __exit_p(x) NULL

#endif

#endif /* _LINUX_INIT_H */