ab3bfca7ab
Remove software_suspend() and all its users since pm_suspend(PM_SUSPEND_DISK) should be equivalent and there's no point in having two interfaces for the same thing. The patch also changes the valid_state function to return 0 (false) for PM_SUSPEND_DISK when SOFTWARE_SUSPEND is not configured instead of accepting it and having the whole thing fail later. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Acked-by: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Pavel Machek <pavel@ucw.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
304 lines
9.5 KiB
C
304 lines
9.5 KiB
C
#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")))
|
|
#define __initdata __attribute__ ((__section__ (".init.data")))
|
|
#define __exitdata __attribute__ ((__section__(".exit.data")))
|
|
#define __exit_call __attribute_used__ __attribute__ ((__section__ (".exitcall.exit")))
|
|
|
|
#ifdef MODULE
|
|
#define __exit __attribute__ ((__section__(".exit.text")))
|
|
#else
|
|
#define __exit __attribute_used__ __attribute__ ((__section__(".exit.text")))
|
|
#endif
|
|
|
|
/* For assembly routines */
|
|
#ifdef CONFIG_HOTPLUG_CPU
|
|
#define __INIT .section ".text","ax"
|
|
#define __INITDATA .section ".data","aw"
|
|
#else
|
|
#define __INIT .section ".init.text","ax"
|
|
#define __INITDATA .section ".init.data","aw"
|
|
#endif
|
|
#define __FINIT .previous
|
|
|
|
#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 */
|
|
extern void setup_arch(char **);
|
|
|
|
#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,1)
|
|
|
|
#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 = 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)
|
|
|
|
#define __obsolete_setup(str) \
|
|
__setup_null_param(str, __LINE__)
|
|
|
|
/* 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 */
|
|
#define __obsolete_setup(str) /* 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 */
|