1#ifndef _LINUX_INIT_H
2#define _LINUX_INIT_H
3
4#include <linux/compiler.h>
5#include <linux/types.h>
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42#define __init __section(.init.text) __cold notrace
43#define __initdata __section(.init.data)
44#define __initconst __constsection(.init.rodata)
45#define __exitdata __section(.exit.data)
46#define __exit_call __used __section(.exitcall.exit)
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52
53#ifdef CONFIG_BROKEN_RODATA
54#define __constsection(x)
55#else
56#define __constsection(x) __section(x)
57#endif
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76#define __ref __section(.ref.text) noinline
77#define __refdata __section(.ref.data)
78#define __refconst __constsection(.ref.rodata)
79
80#ifdef MODULE
81#define __exitused
82#else
83#define __exitused __used
84#endif
85
86#define __exit __section(.exit.text) __exitused __cold notrace
87
88
89#define __meminit __section(.meminit.text) __cold notrace
90#define __meminitdata __section(.meminit.data)
91#define __meminitconst __constsection(.meminit.rodata)
92#define __memexit __section(.memexit.text) __exitused __cold notrace
93#define __memexitdata __section(.memexit.data)
94#define __memexitconst __constsection(.memexit.rodata)
95
96
97#define __HEAD .section ".head.text","ax"
98#define __INIT .section ".init.text","ax"
99#define __FINIT .previous
100
101#define __INITDATA .section ".init.data","aw",%progbits
102#define __INITRODATA .section ".init.rodata","a",%progbits
103#define __FINITDATA .previous
104
105#define __MEMINIT .section ".meminit.text", "ax"
106#define __MEMINITDATA .section ".meminit.data", "aw"
107#define __MEMINITRODATA .section ".meminit.rodata", "a"
108
109
110#define __REF .section ".ref.text", "ax"
111#define __REFDATA .section ".ref.data", "aw"
112#define __REFCONST .section ".ref.rodata", "a"
113
114#ifndef __ASSEMBLY__
115
116
117
118typedef int (*initcall_t)(void);
119typedef void (*exitcall_t)(void);
120
121extern initcall_t __con_initcall_start[], __con_initcall_end[];
122extern initcall_t __security_initcall_start[], __security_initcall_end[];
123
124
125typedef void (*ctor_fn_t)(void);
126
127
128extern int do_one_initcall(initcall_t fn);
129extern char __initdata boot_command_line[];
130extern char *saved_command_line;
131extern unsigned int reset_devices;
132
133
134void setup_arch(char **);
135void prepare_namespace(void);
136void __init load_default_modules(void);
137int __init init_rootfs(void);
138
139#ifdef CONFIG_DEBUG_RODATA
140void mark_rodata_ro(void);
141#endif
142
143extern void (*late_time_init)(void);
144
145extern bool initcall_debug;
146
147#endif
148
149#ifndef MODULE
150
151#ifndef __ASSEMBLY__
152
153#ifdef CONFIG_LTO
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158
159
160#define LTO_REFERENCE_INITCALL(x) \
161 ; \
162 static __used __exit void *reference_##x(void) \
163 { \
164 return &x; \
165 }
166#else
167#define LTO_REFERENCE_INITCALL(x)
168#endif
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179
180#define __define_initcall(fn, id) \
181 static initcall_t __initcall_##fn##id __used \
182 __attribute__((__section__(".initcall" #id ".init"))) = fn; \
183 LTO_REFERENCE_INITCALL(__initcall_##fn##id)
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189
190#define early_initcall(fn) __define_initcall(fn, early)
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198
199#define pure_initcall(fn) __define_initcall(fn, 0)
200
201#define core_initcall(fn) __define_initcall(fn, 1)
202#define core_initcall_sync(fn) __define_initcall(fn, 1s)
203#define postcore_initcall(fn) __define_initcall(fn, 2)
204#define postcore_initcall_sync(fn) __define_initcall(fn, 2s)
205#define arch_initcall(fn) __define_initcall(fn, 3)
206#define arch_initcall_sync(fn) __define_initcall(fn, 3s)
207#define subsys_initcall(fn) __define_initcall(fn, 4)
208#define subsys_initcall_sync(fn) __define_initcall(fn, 4s)
209#define fs_initcall(fn) __define_initcall(fn, 5)
210#define fs_initcall_sync(fn) __define_initcall(fn, 5s)
211#define rootfs_initcall(fn) __define_initcall(fn, rootfs)
212#define device_initcall(fn) __define_initcall(fn, 6)
213#define device_initcall_sync(fn) __define_initcall(fn, 6s)
214#define late_initcall(fn) __define_initcall(fn, 7)
215#define late_initcall_sync(fn) __define_initcall(fn, 7s)
216
217#define __initcall(fn) device_initcall(fn)
218
219#define __exitcall(fn) \
220 static exitcall_t __exitcall_##fn __exit_call = fn
221
222#define console_initcall(fn) \
223 static initcall_t __initcall_##fn \
224 __used __section(.con_initcall.init) = fn
225
226#define security_initcall(fn) \
227 static initcall_t __initcall_##fn \
228 __used __section(.security_initcall.init) = fn
229
230struct obs_kernel_param {
231 const char *str;
232 int (*setup_func)(char *);
233 int early;
234};
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241
242#define __setup_param(str, unique_id, fn, early) \
243 static const char __setup_str_##unique_id[] __initconst \
244 __aligned(1) = str; \
245 static struct obs_kernel_param __setup_##unique_id \
246 __used __section(.init.setup) \
247 __attribute__((aligned((sizeof(long))))) \
248 = { __setup_str_##unique_id, fn, early }
249
250#define __setup(str, fn) \
251 __setup_param(str, fn, fn, 0)
252
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256
257#define early_param(str, fn) \
258 __setup_param(str, fn, fn, 1)
259
260#define early_param_on_off(str_on, str_off, var, config) \
261 \
262 int var = IS_ENABLED(config); \
263 \
264 static int __init parse_##var##_on(char *arg) \
265 { \
266 var = 1; \
267 return 0; \
268 } \
269 __setup_param(str_on, parse_##var##_on, parse_##var##_on, 1); \
270 \
271 static int __init parse_##var##_off(char *arg) \
272 { \
273 var = 0; \
274 return 0; \
275 } \
276 __setup_param(str_off, parse_##var##_off, parse_##var##_off, 1)
277
278
279void __init parse_early_param(void);
280void __init parse_early_options(char *cmdline);
281#endif
282
283#else
284
285#define __setup_param(str, unique_id, fn)
286#define __setup(str, func)
287#endif
288
289
290#define __nosavedata __section(.data..nosave)
291
292#ifdef MODULE
293#define __exit_p(x) x
294#else
295#define __exit_p(x) NULL
296#endif
297
298#endif
299