2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1982, 1988, 1991, 1993
5 * The Regents of the University of California. All rights reserved.
6 * (c) UNIX System Laboratories, Inc.
7 * All or some portions of this file are derived from material licensed
8 * to the University of California by American Telephone and Telegraph
9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
10 * the permission of UNIX System Laboratories, Inc.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
40 #include <sys/types.h>
41 #include <sys/callout.h>
42 #include <sys/kassert.h>
43 #include <sys/queue.h>
44 #include <sys/stdint.h> /* for people using printf mainly */
45 #include <machine/atomic.h>
46 #include <machine/cpufunc.h>
48 __NULLABILITY_PRAGMA_PUSH
51 extern int cold; /* nonzero if we are doing a cold boot */
52 extern int suspend_blocked; /* block suspend due to pending shutdown */
53 extern int rebooting; /* kern_reboot() has been called. */
54 extern char version[]; /* system version */
55 extern char compiler_version[]; /* compiler version */
56 extern char copyright[]; /* system copyright */
57 extern int kstack_pages; /* number of kernel stack pages */
59 extern u_long pagesizes[]; /* supported page sizes */
60 extern long physmem; /* physical memory */
61 extern long realmem; /* 'real' memory */
63 extern char *rootdevnames[2]; /* names of possible root devices */
65 extern int boothowto; /* reboot flags, from console subsystem */
66 extern int bootverbose; /* nonzero to print verbose messages */
68 extern int maxusers; /* system tune hint */
69 extern int ngroups_max; /* max # of supplemental groups */
70 extern int vm_guest; /* Running as virtual machine guest? */
72 extern u_long maxphys; /* max raw I/O transfer size */
75 * Detected virtual machine guest types. The intention is to expand
76 * and/or add to the VM_GUEST_VM type if specific VM functionality is
77 * ever implemented (e.g. vendor-specific paravirtualization features).
78 * Keep in sync with vm_guest_sysctl_names[].
80 enum VM_GUEST { VM_GUEST_NO = 0, VM_GUEST_VM, VM_GUEST_XEN, VM_GUEST_HV,
81 VM_GUEST_VMWARE, VM_GUEST_KVM, VM_GUEST_BHYVE, VM_GUEST_VBOX,
82 VM_GUEST_PARALLELS, VM_LAST };
89 #define __read_mostly __section(".data.read_mostly")
90 #define __read_frequently __section(".data.read_frequently")
91 #define __exclusive_cache_line __aligned(CACHE_LINE_SIZE) \
92 __section(".data.exclusive_cache_line")
93 #if defined(_STANDALONE)
98 #include <sys/param.h> /* MAXCPU */
99 #include <sys/pcpu.h> /* curthread */
100 #include <sys/kpilite.h>
102 extern int osreldate;
104 extern const void *zero_region; /* address space maps to a zeroed page */
106 extern int unmapped_buf_allowed;
109 #define IOSIZE_MAX iosize_max()
110 #define DEVFS_IOSIZE_MAX devfs_iosize_max()
112 #define IOSIZE_MAX SSIZE_MAX
113 #define DEVFS_IOSIZE_MAX SSIZE_MAX
117 * General function declarations.
134 int setjmp(struct _jmp_buf *) __returns_twice;
135 void longjmp(struct _jmp_buf *, int) __dead2;
136 int dumpstatus(vm_offset_t addr, off_t count);
138 int eopnotsupp(void);
139 int ureadc(int, struct uio *);
140 void hashdestroy(void *, struct malloc_type *, u_long);
141 void *hashinit(int count, struct malloc_type *type, u_long *hashmask);
142 void *hashinit_flags(int count, struct malloc_type *type,
143 u_long *hashmask, int flags);
144 #define HASH_NOWAIT 0x00000001
145 #define HASH_WAITOK 0x00000002
147 void *phashinit(int count, struct malloc_type *type, u_long *nentries);
148 void *phashinit_flags(int count, struct malloc_type *type, u_long *nentries,
151 void cpu_flush_dcache(void *, size_t);
152 void cpu_rootconf(void);
153 void critical_enter_KBI(void);
154 void critical_exit_KBI(void);
155 void critical_exit_preempt(void);
156 void init_param1(void);
157 void init_param2(long physpages);
158 void init_static_kenv(char *, size_t);
159 void tablefull(const char *);
162 * Allocate per-thread "current" state in the linuxkpi
164 extern int (*lkpi_alloc_current)(struct thread *, int);
165 int linux_alloc_current_noop(struct thread *, int);
167 #if (defined(KLD_MODULE) && !defined(KLD_TIED)) || defined(KTR_CRITICAL) || !defined(_KERNEL) || defined(GENOFFSET)
168 #define critical_enter() critical_enter_KBI()
169 #define critical_exit() critical_exit_KBI()
174 struct thread_lite *td;
176 td = (struct thread_lite *)curthread;
178 atomic_interrupt_fence();
184 struct thread_lite *td;
186 td = (struct thread_lite *)curthread;
187 KASSERT(td->td_critnest != 0,
188 ("critical_exit: td_critnest == 0"));
189 atomic_interrupt_fence();
191 atomic_interrupt_fence();
192 if (__predict_false(td->td_owepreempt))
193 critical_exit_preempt();
199 typedef void early_putc_t(int ch);
200 extern early_putc_t *early_putc;
202 int kvprintf(char const *, void (*)(int, void*), void *, int,
203 __va_list) __printflike(1, 0);
204 void log(int, const char *, ...) __printflike(2, 3);
205 void log_console(struct uio *);
206 void vlog(int, const char *, __va_list) __printflike(2, 0);
207 int asprintf(char **ret, struct malloc_type *mtp, const char *format,
208 ...) __printflike(3, 4);
209 int printf(const char *, ...) __printflike(1, 2);
210 int snprintf(char *, size_t, const char *, ...) __printflike(3, 4);
211 int sprintf(char *buf, const char *, ...) __printflike(2, 3);
212 int uprintf(const char *, ...) __printflike(1, 2);
213 int vprintf(const char *, __va_list) __printflike(1, 0);
214 int vasprintf(char **ret, struct malloc_type *mtp, const char *format,
215 __va_list ap) __printflike(3, 0);
216 int vsnprintf(char *, size_t, const char *, __va_list) __printflike(3, 0);
217 int vsnrprintf(char *, size_t, int, const char *, __va_list) __printflike(4, 0);
218 int vsprintf(char *buf, const char *, __va_list) __printflike(2, 0);
219 int sscanf(const char *, char const * _Nonnull, ...) __scanflike(2, 3);
220 int vsscanf(const char * _Nonnull, char const * _Nonnull, __va_list) __scanflike(2, 0);
221 long strtol(const char *, char **, int);
222 u_long strtoul(const char *, char **, int);
223 quad_t strtoq(const char *, char **, int);
224 u_quad_t strtouq(const char *, char **, int);
225 void tprintf(struct proc *p, int pri, const char *, ...) __printflike(3, 4);
226 void vtprintf(struct proc *, int, const char *, __va_list) __printflike(3, 0);
227 void hexdump(const void *ptr, int length, const char *hdr, int flags);
228 #define HD_COLUMN_MASK 0xff
229 #define HD_DELIM_MASK 0xff00
230 #define HD_OMIT_COUNT (1 << 16)
231 #define HD_OMIT_HEX (1 << 17)
232 #define HD_OMIT_CHARS (1 << 18)
234 #define ovbcopy(f, t, l) bcopy((f), (t), (l))
235 void explicit_bzero(void * _Nonnull, size_t);
237 void *memset(void * _Nonnull buf, int c, size_t len);
238 void *memcpy(void * _Nonnull to, const void * _Nonnull from, size_t len);
239 void *memmove(void * _Nonnull dest, const void * _Nonnull src, size_t n);
240 int memcmp(const void *b1, const void *b2, size_t len);
242 #ifdef SAN_NEEDS_INTERCEPTORS
243 #define SAN_INTERCEPTOR(func) \
244 __CONCAT(SAN_INTERCEPTOR_PREFIX, __CONCAT(_, func))
245 void *SAN_INTERCEPTOR(memset)(void *, int, size_t);
246 void *SAN_INTERCEPTOR(memcpy)(void *, const void *, size_t);
247 void *SAN_INTERCEPTOR(memmove)(void *, const void *, size_t);
248 int SAN_INTERCEPTOR(memcmp)(const void *, const void *, size_t);
250 #define bcopy(from, to, len) SAN_INTERCEPTOR(memmove)((to), (from), (len))
251 #define bzero(buf, len) SAN_INTERCEPTOR(memset)((buf), 0, (len))
252 #define bcmp(b1, b2, len) SAN_INTERCEPTOR(memcmp)((b1), (b2), (len))
253 #define memset(buf, c, len) SAN_INTERCEPTOR(memset)((buf), (c), (len))
254 #define memcpy(to, from, len) SAN_INTERCEPTOR(memcpy)((to), (from), (len))
255 #define memmove(dest, src, n) SAN_INTERCEPTOR(memmove)((dest), (src), (n))
256 #define memcmp(b1, b2, len) SAN_INTERCEPTOR(memcmp)((b1), (b2), (len))
257 #endif /* !SAN_RUNTIME */
258 #else /* !SAN_NEEDS_INTERCEPTORS */
259 #define bcopy(from, to, len) __builtin_memmove((to), (from), (len))
260 #define bzero(buf, len) __builtin_memset((buf), 0, (len))
261 #define bcmp(b1, b2, len) __builtin_memcmp((b1), (b2), (len))
262 #define memset(buf, c, len) __builtin_memset((buf), (c), (len))
263 #define memcpy(to, from, len) __builtin_memcpy((to), (from), (len))
264 #define memmove(dest, src, n) __builtin_memmove((dest), (src), (n))
265 #define memcmp(b1, b2, len) __builtin_memcmp((b1), (b2), (len))
266 #endif /* SAN_NEEDS_INTERCEPTORS */
268 void *memset_early(void * _Nonnull buf, int c, size_t len);
269 #define bzero_early(buf, len) memset_early((buf), 0, (len))
270 void *memcpy_early(void * _Nonnull to, const void * _Nonnull from, size_t len);
271 void *memmove_early(void * _Nonnull dest, const void * _Nonnull src, size_t n);
272 #define bcopy_early(from, to, len) memmove_early((to), (from), (len))
274 #define copystr(src, dst, len, outlen) ({ \
275 size_t __r, __len, *__outlen; \
278 __outlen = (outlen); \
279 __r = strlcpy((dst), (src), __len); \
280 if (__outlen != NULL) \
281 *__outlen = ((__r >= __len) ? __len : __r + 1); \
282 ((__r >= __len) ? ENAMETOOLONG : 0); \
285 int __result_use_check copyinstr(const void * __restrict udaddr,
286 void * _Nonnull __restrict kaddr, size_t len,
287 size_t * __restrict lencopied);
288 int __result_use_check copyin(const void * __restrict udaddr,
289 void * _Nonnull __restrict kaddr, size_t len);
290 int __result_use_check copyin_nofault(const void * __restrict udaddr,
291 void * _Nonnull __restrict kaddr, size_t len);
292 int __result_use_check copyout(const void * _Nonnull __restrict kaddr,
293 void * __restrict udaddr, size_t len);
294 int __result_use_check copyout_nofault(const void * _Nonnull __restrict kaddr,
295 void * __restrict udaddr, size_t len);
297 #ifdef SAN_NEEDS_INTERCEPTORS
298 int SAN_INTERCEPTOR(copyin)(const void *, void *, size_t);
299 int SAN_INTERCEPTOR(copyinstr)(const void *, void *, size_t, size_t *);
300 int SAN_INTERCEPTOR(copyout)(const void *, void *, size_t);
302 #define copyin(u, k, l) SAN_INTERCEPTOR(copyin)((u), (k), (l))
303 #define copyinstr(u, k, l, lc) SAN_INTERCEPTOR(copyinstr)((u), (k), (l), (lc))
304 #define copyout(k, u, l) SAN_INTERCEPTOR(copyout)((k), (u), (l))
305 #endif /* !SAN_RUNTIME */
306 #endif /* SAN_NEEDS_INTERCEPTORS */
308 int fubyte(volatile const void *base);
309 long fuword(volatile const void *base);
310 int fuword16(volatile const void *base);
311 int32_t fuword32(volatile const void *base);
312 int64_t fuword64(volatile const void *base);
313 int __result_use_check fueword(volatile const void *base, long *val);
314 int __result_use_check fueword32(volatile const void *base, int32_t *val);
315 int __result_use_check fueword64(volatile const void *base, int64_t *val);
316 int __result_use_check subyte(volatile void *base, int byte);
317 int __result_use_check suword(volatile void *base, long word);
318 int __result_use_check suword16(volatile void *base, int word);
319 int __result_use_check suword32(volatile void *base, int32_t word);
320 int __result_use_check suword64(volatile void *base, int64_t word);
321 uint32_t casuword32(volatile uint32_t *base, uint32_t oldval, uint32_t newval);
322 u_long casuword(volatile u_long *p, u_long oldval, u_long newval);
323 int casueword32(volatile uint32_t *base, uint32_t oldval, uint32_t *oldvalp,
325 int casueword(volatile u_long *p, u_long oldval, u_long *oldvalp,
328 #if defined(SAN_NEEDS_INTERCEPTORS) && !defined(KCSAN)
329 int SAN_INTERCEPTOR(fubyte)(volatile const void *base);
330 int SAN_INTERCEPTOR(fuword16)(volatile const void *base);
331 int SAN_INTERCEPTOR(fueword)(volatile const void *base, long *val);
332 int SAN_INTERCEPTOR(fueword32)(volatile const void *base, int32_t *val);
333 int SAN_INTERCEPTOR(fueword64)(volatile const void *base, int64_t *val);
334 int SAN_INTERCEPTOR(subyte)(volatile void *base, int byte);
335 int SAN_INTERCEPTOR(suword)(volatile void *base, long word);
336 int SAN_INTERCEPTOR(suword16)(volatile void *base, int word);
337 int SAN_INTERCEPTOR(suword32)(volatile void *base, int32_t word);
338 int SAN_INTERCEPTOR(suword64)(volatile void *base, int64_t word);
339 int SAN_INTERCEPTOR(casueword32)(volatile uint32_t *base, uint32_t oldval,
340 uint32_t *oldvalp, uint32_t newval);
341 int SAN_INTERCEPTOR(casueword)(volatile u_long *p, u_long oldval,
342 u_long *oldvalp, u_long newval);
344 #define fubyte(b) SAN_INTERCEPTOR(fubyte)((b))
345 #define fuword16(b) SAN_INTERCEPTOR(fuword16)((b))
346 #define fueword(b, v) SAN_INTERCEPTOR(fueword)((b), (v))
347 #define fueword32(b, v) SAN_INTERCEPTOR(fueword32)((b), (v))
348 #define fueword64(b, v) SAN_INTERCEPTOR(fueword64)((b), (v))
349 #define subyte(b, w) SAN_INTERCEPTOR(subyte)((b), (w))
350 #define suword(b, w) SAN_INTERCEPTOR(suword)((b), (w))
351 #define suword16(b, w) SAN_INTERCEPTOR(suword16)((b), (w))
352 #define suword32(b, w) SAN_INTERCEPTOR(suword32)((b), (w))
353 #define suword64(b, w) SAN_INTERCEPTOR(suword64)((b), (w))
354 #define casueword32(b, o, p, n) SAN_INTERCEPTOR(casueword32)((b), (o), (p), (n))
355 #define casueword(b, o, p, n) SAN_INTERCEPTOR(casueword)((b), (o), (p), (n))
356 #endif /* !SAN_RUNTIME */
357 #endif /* SAN_NEEDS_INTERCEPTORS && !KCSAN */
359 int sysbeep(int hertz, sbintime_t duration);
361 void hardclock(int cnt, int usermode);
362 void hardclock_sync(int cpu);
363 void statclock(int cnt, int usermode);
364 void profclock(int cnt, int usermode, uintfptr_t pc);
366 int hardclockintr(void);
368 void startprofclock(struct proc *);
369 void stopprofclock(struct proc *);
370 void cpu_startprofclock(void);
371 void cpu_stopprofclock(void);
372 void suspendclock(void);
373 void resumeclock(void);
374 sbintime_t cpu_idleclock(void);
375 void cpu_activeclock(void);
376 void cpu_new_callout(int cpu, sbintime_t bt, sbintime_t bt_opt);
377 void cpu_et_frequency(struct eventtimer *et, uint64_t newfreq);
378 extern int cpu_disable_c2_sleep;
379 extern int cpu_disable_c3_sleep;
381 extern void (*tcp_hpts_softclock)(void);
382 #define tcp_hpts_softclock() do { \
383 if (tcp_hpts_softclock != NULL) \
384 tcp_hpts_softclock(); \
387 char *kern_getenv(const char *name);
388 void freeenv(char *env);
389 int getenv_int(const char *name, int *data);
390 int getenv_uint(const char *name, unsigned int *data);
391 int getenv_long(const char *name, long *data);
392 int getenv_ulong(const char *name, unsigned long *data);
393 int getenv_string(const char *name, char *data, int size);
394 int getenv_int64(const char *name, int64_t *data);
395 int getenv_uint64(const char *name, uint64_t *data);
396 int getenv_quad(const char *name, quad_t *data);
397 int getenv_bool(const char *name, bool *data);
398 bool getenv_is_true(const char *name);
399 bool getenv_is_false(const char *name);
400 int kern_setenv(const char *name, const char *value);
401 int kern_unsetenv(const char *name);
402 int testenv(const char *name);
404 int getenv_array(const char *name, void *data, int size, int *psize,
405 int type_size, bool allow_signed);
406 #define GETENV_UNSIGNED false /* negative numbers not allowed */
407 #define GETENV_SIGNED true /* negative numbers allowed */
409 typedef uint64_t (cpu_tick_f)(void);
410 void set_cputicker(cpu_tick_f *func, uint64_t freq, bool isvariable);
411 extern cpu_tick_f *cpu_ticks;
412 uint64_t cpu_tickrate(void);
413 uint64_t cputick2usec(uint64_t tick);
415 #include <sys/libkern.h>
417 /* Initialize the world */
419 void cpu_initclocks(void);
420 void cpu_initclocks_bsp(void);
421 void cpu_initclocks_ap(void);
422 void usrinfoinit(void);
424 /* Finalize the world */
425 void kern_reboot(int) __dead2;
426 void shutdown_nice(int);
428 /* Stubs for obsolete functions that used to be for interrupt management */
429 static __inline intrmask_t splhigh(void) { return 0; }
430 static __inline intrmask_t splimp(void) { return 0; }
431 static __inline intrmask_t splnet(void) { return 0; }
432 static __inline intrmask_t spltty(void) { return 0; }
433 static __inline void splx(intrmask_t ipl __unused) { return; }
436 * Common `proc' functions are declared here so that proc.h can be included
439 int _sleep(const void * _Nonnull chan, struct lock_object *lock, int pri,
440 const char *wmesg, sbintime_t sbt, sbintime_t pr, int flags);
441 #define msleep(chan, mtx, pri, wmesg, timo) \
442 _sleep((chan), &(mtx)->lock_object, (pri), (wmesg), \
443 tick_sbt * (timo), 0, C_HARDCLOCK)
444 #define msleep_sbt(chan, mtx, pri, wmesg, bt, pr, flags) \
445 _sleep((chan), &(mtx)->lock_object, (pri), (wmesg), (bt), (pr), \
447 int msleep_spin_sbt(const void * _Nonnull chan, struct mtx *mtx,
448 const char *wmesg, sbintime_t sbt, sbintime_t pr, int flags);
449 #define msleep_spin(chan, mtx, wmesg, timo) \
450 msleep_spin_sbt((chan), (mtx), (wmesg), tick_sbt * (timo), \
452 int pause_sbt(const char *wmesg, sbintime_t sbt, sbintime_t pr,
455 pause(const char *wmesg, int timo)
457 return (pause_sbt(wmesg, tick_sbt * timo, 0, C_HARDCLOCK));
459 #define pause_sig(wmesg, timo) \
460 pause_sbt((wmesg), tick_sbt * (timo), 0, C_HARDCLOCK | C_CATCH)
461 #define tsleep(chan, pri, wmesg, timo) \
462 _sleep((chan), NULL, (pri), (wmesg), tick_sbt * (timo), \
464 #define tsleep_sbt(chan, pri, wmesg, bt, pr, flags) \
465 _sleep((chan), NULL, (pri), (wmesg), (bt), (pr), (flags))
466 void wakeup(const void *chan);
467 void wakeup_one(const void *chan);
468 void wakeup_any(const void *chan);
471 * Common `struct cdev *' stuff are declared here to avoid #include poisoning
475 dev_t dev2udev(struct cdev *x);
476 const char *devtoname(struct cdev *cdev);
479 size_t devfs_iosize_max(void);
480 size_t iosize_max(void);
483 int poll_no_poll(int events);
485 /* XXX: Should be void nanodelay(u_int nsec); */
486 void DELAY(int usec);
488 /* Root mount holdback API */
489 struct root_hold_token {
492 TAILQ_ENTRY(root_hold_token) list;
495 struct root_hold_token *root_mount_hold(const char *identifier);
496 void root_mount_hold_token(const char *identifier, struct root_hold_token *h);
497 void root_mount_rel(struct root_hold_token *h);
498 int root_mounted(void);
501 * Unit number allocation API. (kern/subr_unit.c)
504 #define UNR_NO_MTX ((void *)(uintptr_t)-1)
505 struct unrhdr *new_unrhdr(int low, int high, struct mtx *mutex);
506 void init_unrhdr(struct unrhdr *uh, int low, int high, struct mtx *mutex);
507 void delete_unrhdr(struct unrhdr *uh);
508 void clear_unrhdr(struct unrhdr *uh);
509 void clean_unrhdr(struct unrhdr *uh);
510 void clean_unrhdrl(struct unrhdr *uh);
511 int alloc_unr(struct unrhdr *uh);
512 int alloc_unr_specific(struct unrhdr *uh, u_int item);
513 int alloc_unrl(struct unrhdr *uh);
514 void free_unr(struct unrhdr *uh, u_int item);
515 void *create_iter_unr(struct unrhdr *uh);
516 int next_iter_unr(void *handle);
517 void free_iter_unr(void *handle);
524 new_unrhdr64(struct unrhdr64 *unr64, uint64_t low)
527 unr64->counter = low;
530 static __inline uint64_t
531 alloc_unr64(struct unrhdr64 *unr64)
534 return (atomic_fetchadd_64(&unr64->counter, 1));
537 void intr_prof_stack_use(struct thread *td, struct trapframe *frame);
539 void counted_warning(unsigned *counter, const char *msg);
542 * APIs to manage deprecation and obsolescence.
544 void _gone_in(int major, const char *msg);
545 void _gone_in_dev(device_t dev, int major, const char *msg);
546 #ifdef NO_OBSOLETE_CODE
547 #define __gone_ok(m, msg) \
548 _Static_assert(m < P_OSREL_MAJOR(__FreeBSD_version)), \
549 "Obsolete code: " msg);
551 #define __gone_ok(m, msg)
553 #define gone_in(major, msg) __gone_ok(major, msg) _gone_in(major, msg)
554 #define gone_in_dev(dev, major, msg) __gone_ok(major, msg) _gone_in_dev(dev, major, msg)
559 #define __diagused __unused
563 #define __witness_used
565 #define __witness_used __unused
570 __NULLABILITY_PRAGMA_POP
571 #endif /* !_SYS_SYSTM_H_ */