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
36 * @(#)systm.h 8.7 (Berkeley) 3/29/95
43 #include <sys/cdefs.h>
44 #include <machine/atomic.h>
45 #include <machine/cpufunc.h>
46 #include <sys/callout.h>
47 #include <sys/queue.h>
48 #include <sys/stdint.h> /* for people using printf mainly */
50 __NULLABILITY_PRAGMA_PUSH
53 extern int cold; /* nonzero if we are doing a cold boot */
54 extern int suspend_blocked; /* block suspend due to pending shutdown */
55 extern int rebooting; /* kern_reboot() has been called. */
56 extern const char *panicstr; /* panic message */
58 #define KERNEL_PANICKED() __predict_false(panicked)
59 extern char version[]; /* system version */
60 extern char compiler_version[]; /* compiler version */
61 extern char copyright[]; /* system copyright */
62 extern int kstack_pages; /* number of kernel stack pages */
64 extern u_long pagesizes[]; /* supported page sizes */
65 extern long physmem; /* physical memory */
66 extern long realmem; /* 'real' memory */
68 extern char *rootdevnames[2]; /* names of possible root devices */
70 extern int boothowto; /* reboot flags, from console subsystem */
71 extern int bootverbose; /* nonzero to print verbose messages */
73 extern int maxusers; /* system tune hint */
74 extern int ngroups_max; /* max # of supplemental groups */
75 extern int vm_guest; /* Running as virtual machine guest? */
78 * Detected virtual machine guest types. The intention is to expand
79 * and/or add to the VM_GUEST_VM type if specific VM functionality is
80 * ever implemented (e.g. vendor-specific paravirtualization features).
81 * Keep in sync with vm_guest_sysctl_names[].
83 enum VM_GUEST { VM_GUEST_NO = 0, VM_GUEST_VM, VM_GUEST_XEN, VM_GUEST_HV,
84 VM_GUEST_VMWARE, VM_GUEST_KVM, VM_GUEST_BHYVE, VM_GUEST_VBOX,
85 VM_GUEST_PARALLELS, VM_LAST };
87 #ifdef INVARIANTS /* The option is always available */
88 #define VNASSERT(exp, vp, msg) do { \
89 if (__predict_false(!(exp))) { \
90 vn_printf(vp, "VNASSERT failed: %s not true at %s:%d (%s)\n",\
91 #exp, __FILE__, __LINE__, __func__); \
95 #define VNPASS(exp, vp) do { \
96 const char *_exp = #exp; \
97 VNASSERT(exp, vp, ("condition %s not met at %s:%d (%s)", \
98 _exp, __FILE__, __LINE__, __func__)); \
100 #define __assert_unreachable() \
101 panic("executing segment marked as unreachable at %s:%d (%s)\n", \
102 __FILE__, __LINE__, __func__)
104 #define VNASSERT(exp, vp, msg) do { \
106 #define VNPASS(exp, vp) do { \
108 #define __assert_unreachable() __unreachable()
111 #ifndef CTASSERT /* Allow lint to override */
112 #define CTASSERT(x) _Static_assert(x, "compile-time assertion failed")
117 * These functions need to be declared before the KASSERT macro is invoked in
118 * !KASSERT_PANIC_OPTIONAL builds, so their declarations are sort of out of
119 * place compared to other function definitions in this header. On the other
120 * hand, this header is a bit disorganized anyway.
122 void panic(const char *, ...) __dead2 __printflike(1, 2);
123 void vpanic(const char *, __va_list) __dead2 __printflike(1, 0);
126 #if defined(_STANDALONE)
128 * Until we have more experience with KASSERTS that are called
129 * from the boot loader, they are off. The bootloader does this
130 * a little differently than the kernel (we just call printf atm).
131 * we avoid most of the common functions in the boot loader, so
132 * declare printf() here too.
134 int printf(const char *, ...) __printflike(1, 2);
135 # define kassert_panic printf
136 #else /* !_STANDALONE */
137 # if defined(WITNESS) || defined(INVARIANT_SUPPORT)
138 # ifdef KASSERT_PANIC_OPTIONAL
139 void kassert_panic(const char *fmt, ...) __printflike(1, 2);
141 # define kassert_panic panic
142 # endif /* KASSERT_PANIC_OPTIONAL */
143 # endif /* defined(WITNESS) || defined(INVARIANT_SUPPORT) */
144 #endif /* _STANDALONE */
146 #if defined(INVARIANTS) || defined(_STANDALONE)
147 #define KASSERT(exp,msg) do { \
148 if (__predict_false(!(exp))) \
151 #else /* !INVARIANTS && !_STANDALONE */
152 #define KASSERT(exp,msg) do { \
154 #endif /* INVARIANTS || _STANDALONE */
157 * Helpful macros for quickly coming up with assertions with informative
160 #define MPASS(ex) MPASS4(ex, #ex, __FILE__, __LINE__)
161 #define MPASS2(ex, what) MPASS4(ex, what, __FILE__, __LINE__)
162 #define MPASS3(ex, file, line) MPASS4(ex, #ex, file, line)
163 #define MPASS4(ex, what, file, line) \
164 KASSERT((ex), ("Assertion %s failed at %s:%d", what, file, line))
169 #define __read_mostly __section(".data.read_mostly")
170 #define __read_frequently __section(".data.read_frequently")
171 #define __exclusive_cache_line __aligned(CACHE_LINE_SIZE) \
172 __section(".data.exclusive_cache_line")
174 #include <sys/param.h> /* MAXCPU */
175 #include <sys/pcpu.h> /* curthread */
176 #include <sys/kpilite.h>
179 * Assert that a pointer can be loaded from memory atomically.
181 * This assertion enforces stronger alignment than necessary. For example,
182 * on some architectures, atomicity for unaligned loads will depend on
183 * whether or not the load spans multiple cache lines.
185 #define ASSERT_ATOMIC_LOAD_PTR(var, msg) \
186 KASSERT(sizeof(var) == sizeof(void *) && \
187 ((uintptr_t)&(var) & (sizeof(void *) - 1)) == 0, msg)
190 * Assert that a thread is in critical(9) section.
192 #define CRITICAL_ASSERT(td) \
193 KASSERT((td)->td_critnest >= 1, ("Not in critical section"));
196 * If we have already panic'd and this is the thread that called
197 * panic(), then don't block on any mutexes but silently succeed.
198 * Otherwise, the kernel will deadlock since the scheduler isn't
199 * going to run the thread that holds any lock we need.
201 #define SCHEDULER_STOPPED_TD(td) ({ \
202 MPASS((td) == curthread); \
203 __predict_false((td)->td_stopsched); \
205 #define SCHEDULER_STOPPED() SCHEDULER_STOPPED_TD(curthread)
208 * XXX the hints declarations are even more misplaced than most declarations
209 * in this file, since they are needed in one file (per arch) and only used
211 * XXX most of these variables should be const.
213 extern int osreldate;
214 extern bool dynamic_kenv;
215 extern struct mtx kenv_lock;
216 extern char *kern_envp;
217 extern char *md_envp;
218 extern char static_env[];
219 extern char static_hints[]; /* by config for now */
223 extern const void *zero_region; /* address space maps to a zeroed page */
225 extern int unmapped_buf_allowed;
228 #define IOSIZE_MAX iosize_max()
229 #define DEVFS_IOSIZE_MAX devfs_iosize_max()
231 #define IOSIZE_MAX SSIZE_MAX
232 #define DEVFS_IOSIZE_MAX SSIZE_MAX
236 * General function declarations.
253 int setjmp(struct _jmp_buf *) __returns_twice;
254 void longjmp(struct _jmp_buf *, int) __dead2;
255 int dumpstatus(vm_offset_t addr, off_t count);
257 int eopnotsupp(void);
258 int ureadc(int, struct uio *);
259 void hashdestroy(void *, struct malloc_type *, u_long);
260 void *hashinit(int count, struct malloc_type *type, u_long *hashmask);
261 void *hashinit_flags(int count, struct malloc_type *type,
262 u_long *hashmask, int flags);
263 #define HASH_NOWAIT 0x00000001
264 #define HASH_WAITOK 0x00000002
266 void *phashinit(int count, struct malloc_type *type, u_long *nentries);
267 void *phashinit_flags(int count, struct malloc_type *type, u_long *nentries,
269 void g_waitidle(void);
271 void cpu_flush_dcache(void *, size_t);
272 void cpu_rootconf(void);
273 void critical_enter_KBI(void);
274 void critical_exit_KBI(void);
275 void critical_exit_preempt(void);
276 void init_param1(void);
277 void init_param2(long physpages);
278 void init_static_kenv(char *, size_t);
279 void tablefull(const char *);
282 * Allocate per-thread "current" state in the linuxkpi
284 extern int (*lkpi_alloc_current)(struct thread *, int);
285 int linux_alloc_current_noop(struct thread *, int);
287 #if defined(KLD_MODULE) || defined(KTR_CRITICAL) || !defined(_KERNEL) || defined(GENOFFSET)
288 #define critical_enter() critical_enter_KBI()
289 #define critical_exit() critical_exit_KBI()
294 struct thread_lite *td;
296 td = (struct thread_lite *)curthread;
304 struct thread_lite *td;
306 td = (struct thread_lite *)curthread;
307 KASSERT(td->td_critnest != 0,
308 ("critical_exit: td_critnest == 0"));
312 if (__predict_false(td->td_owepreempt))
313 critical_exit_preempt();
319 typedef void early_putc_t(int ch);
320 extern early_putc_t *early_putc;
322 int kvprintf(char const *, void (*)(int, void*), void *, int,
323 __va_list) __printflike(1, 0);
324 void log(int, const char *, ...) __printflike(2, 3);
325 void log_console(struct uio *);
326 void vlog(int, const char *, __va_list) __printflike(2, 0);
327 int asprintf(char **ret, struct malloc_type *mtp, const char *format,
328 ...) __printflike(3, 4);
329 int printf(const char *, ...) __printflike(1, 2);
330 int snprintf(char *, size_t, const char *, ...) __printflike(3, 4);
331 int sprintf(char *buf, const char *, ...) __printflike(2, 3);
332 int uprintf(const char *, ...) __printflike(1, 2);
333 int vprintf(const char *, __va_list) __printflike(1, 0);
334 int vasprintf(char **ret, struct malloc_type *mtp, const char *format,
335 __va_list ap) __printflike(3, 0);
336 int vsnprintf(char *, size_t, const char *, __va_list) __printflike(3, 0);
337 int vsnrprintf(char *, size_t, int, const char *, __va_list) __printflike(4, 0);
338 int vsprintf(char *buf, const char *, __va_list) __printflike(2, 0);
339 int sscanf(const char *, char const * _Nonnull, ...) __scanflike(2, 3);
340 int vsscanf(const char * _Nonnull, char const * _Nonnull, __va_list) __scanflike(2, 0);
341 long strtol(const char *, char **, int);
342 u_long strtoul(const char *, char **, int);
343 quad_t strtoq(const char *, char **, int);
344 u_quad_t strtouq(const char *, char **, int);
345 void tprintf(struct proc *p, int pri, const char *, ...) __printflike(3, 4);
346 void vtprintf(struct proc *, int, const char *, __va_list) __printflike(3, 0);
347 void hexdump(const void *ptr, int length, const char *hdr, int flags);
348 #define HD_COLUMN_MASK 0xff
349 #define HD_DELIM_MASK 0xff00
350 #define HD_OMIT_COUNT (1 << 16)
351 #define HD_OMIT_HEX (1 << 17)
352 #define HD_OMIT_CHARS (1 << 18)
354 #define ovbcopy(f, t, l) bcopy((f), (t), (l))
355 void bcopy(const void * _Nonnull from, void * _Nonnull to, size_t len);
356 void bzero(void * _Nonnull buf, size_t len);
357 void explicit_bzero(void * _Nonnull, size_t);
358 int bcmp(const void *b1, const void *b2, size_t len);
360 void *memset(void * _Nonnull buf, int c, size_t len);
361 void *memcpy(void * _Nonnull to, const void * _Nonnull from, size_t len);
362 void *memmove(void * _Nonnull dest, const void * _Nonnull src, size_t n);
363 int memcmp(const void *b1, const void *b2, size_t len);
366 void *kcsan_memset(void *, int, size_t);
367 void *kcsan_memcpy(void *, const void *, size_t);
368 void *kcsan_memmove(void *, const void *, size_t);
369 int kcsan_memcmp(const void *, const void *, size_t);
370 #define bcopy(from, to, len) kcsan_memmove((to), (from), (len))
371 #define bzero(buf, len) kcsan_memset((buf), 0, (len))
372 #define bcmp(b1, b2, len) kcsan_memcmp((b1), (b2), (len))
373 #define memset(buf, c, len) kcsan_memset((buf), (c), (len))
374 #define memcpy(to, from, len) kcsan_memcpy((to), (from), (len))
375 #define memmove(dest, src, n) kcsan_memmove((dest), (src), (n))
376 #define memcmp(b1, b2, len) kcsan_memcmp((b1), (b2), (len))
378 #define bcopy(from, to, len) __builtin_memmove((to), (from), (len))
379 #define bzero(buf, len) __builtin_memset((buf), 0, (len))
380 #define bcmp(b1, b2, len) __builtin_memcmp((b1), (b2), (len))
381 #define memset(buf, c, len) __builtin_memset((buf), (c), (len))
382 #define memcpy(to, from, len) __builtin_memcpy((to), (from), (len))
383 #define memmove(dest, src, n) __builtin_memmove((dest), (src), (n))
384 #define memcmp(b1, b2, len) __builtin_memcmp((b1), (b2), (len))
387 void *memset_early(void * _Nonnull buf, int c, size_t len);
388 #define bzero_early(buf, len) memset_early((buf), 0, (len))
389 void *memcpy_early(void * _Nonnull to, const void * _Nonnull from, size_t len);
390 void *memmove_early(void * _Nonnull dest, const void * _Nonnull src, size_t n);
391 #define bcopy_early(from, to, len) memmove_early((to), (from), (len))
393 #define copystr(src, dst, len, outlen) ({ \
394 size_t __r, __len, *__outlen; \
397 __outlen = (outlen); \
398 __r = strlcpy((dst), (src), __len); \
399 if (__outlen != NULL) \
400 *__outlen = ((__r >= __len) ? __len : __r + 1); \
401 ((__r >= __len) ? ENAMETOOLONG : 0); \
404 int copyinstr(const void * __restrict udaddr,
405 void * _Nonnull __restrict kaddr, size_t len,
406 size_t * __restrict lencopied);
407 int copyin(const void * __restrict udaddr,
408 void * _Nonnull __restrict kaddr, size_t len);
409 int copyin_nofault(const void * __restrict udaddr,
410 void * _Nonnull __restrict kaddr, size_t len);
411 int copyout(const void * _Nonnull __restrict kaddr,
412 void * __restrict udaddr, size_t len);
413 int copyout_nofault(const void * _Nonnull __restrict kaddr,
414 void * __restrict udaddr, size_t len);
417 int kcsan_copyin(const void *, void *, size_t);
418 int kcsan_copyinstr(const void *, void *, size_t, size_t *);
419 int kcsan_copyout(const void *, void *, size_t);
420 #define copyin(u, k, l) kcsan_copyin((u), (k), (l))
421 #define copyinstr(u, k, l, lc) kcsan_copyinstr((u), (k), (l), (lc))
422 #define copyout(k, u, l) kcsan_copyout((k), (u), (l))
425 int fubyte(volatile const void *base);
426 long fuword(volatile const void *base);
427 int fuword16(volatile const void *base);
428 int32_t fuword32(volatile const void *base);
429 int64_t fuword64(volatile const void *base);
430 int fueword(volatile const void *base, long *val);
431 int fueword32(volatile const void *base, int32_t *val);
432 int fueword64(volatile const void *base, int64_t *val);
433 int subyte(volatile void *base, int byte);
434 int suword(volatile void *base, long word);
435 int suword16(volatile void *base, int word);
436 int suword32(volatile void *base, int32_t word);
437 int suword64(volatile void *base, int64_t word);
438 uint32_t casuword32(volatile uint32_t *base, uint32_t oldval, uint32_t newval);
439 u_long casuword(volatile u_long *p, u_long oldval, u_long newval);
440 int casueword32(volatile uint32_t *base, uint32_t oldval, uint32_t *oldvalp,
442 int casueword(volatile u_long *p, u_long oldval, u_long *oldvalp,
445 void realitexpire(void *);
447 int sysbeep(int hertz, int period);
449 void hardclock(int cnt, int usermode);
450 void hardclock_sync(int cpu);
451 void softclock(void *);
452 void statclock(int cnt, int usermode);
453 void profclock(int cnt, int usermode, uintfptr_t pc);
455 int hardclockintr(void);
457 void startprofclock(struct proc *);
458 void stopprofclock(struct proc *);
459 void cpu_startprofclock(void);
460 void cpu_stopprofclock(void);
461 void suspendclock(void);
462 void resumeclock(void);
463 sbintime_t cpu_idleclock(void);
464 void cpu_activeclock(void);
465 void cpu_new_callout(int cpu, sbintime_t bt, sbintime_t bt_opt);
466 void cpu_et_frequency(struct eventtimer *et, uint64_t newfreq);
467 extern int cpu_disable_c2_sleep;
468 extern int cpu_disable_c3_sleep;
470 char *kern_getenv(const char *name);
471 void freeenv(char *env);
472 int getenv_int(const char *name, int *data);
473 int getenv_uint(const char *name, unsigned int *data);
474 int getenv_long(const char *name, long *data);
475 int getenv_ulong(const char *name, unsigned long *data);
476 int getenv_string(const char *name, char *data, int size);
477 int getenv_int64(const char *name, int64_t *data);
478 int getenv_uint64(const char *name, uint64_t *data);
479 int getenv_quad(const char *name, quad_t *data);
480 int getenv_bool(const char *name, bool *data);
481 bool getenv_is_true(const char *name);
482 bool getenv_is_false(const char *name);
483 int kern_setenv(const char *name, const char *value);
484 int kern_unsetenv(const char *name);
485 int testenv(const char *name);
487 int getenv_array(const char *name, void *data, int size, int *psize,
488 int type_size, bool allow_signed);
489 #define GETENV_UNSIGNED false /* negative numbers not allowed */
490 #define GETENV_SIGNED true /* negative numbers allowed */
492 typedef uint64_t (cpu_tick_f)(void);
493 void set_cputicker(cpu_tick_f *func, uint64_t freq, unsigned var);
494 extern cpu_tick_f *cpu_ticks;
495 uint64_t cpu_tickrate(void);
496 uint64_t cputick2usec(uint64_t tick);
498 #ifdef APM_FIXUP_CALLTODO
500 void adjust_timeout_calltodo(struct timeval *time_change);
501 #endif /* APM_FIXUP_CALLTODO */
503 #include <sys/libkern.h>
505 /* Initialize the world */
507 void cpu_initclocks(void);
508 void cpu_initclocks_bsp(void);
509 void cpu_initclocks_ap(void);
510 void usrinfoinit(void);
512 /* Finalize the world */
513 void kern_reboot(int) __dead2;
514 void shutdown_nice(int);
516 /* Stubs for obsolete functions that used to be for interrupt management */
517 static __inline intrmask_t splhigh(void) { return 0; }
518 static __inline intrmask_t splimp(void) { return 0; }
519 static __inline intrmask_t splnet(void) { return 0; }
520 static __inline intrmask_t spltty(void) { return 0; }
521 static __inline void splx(intrmask_t ipl __unused) { return; }
524 * Common `proc' functions are declared here so that proc.h can be included
527 int _sleep(const void * _Nonnull chan, struct lock_object *lock, int pri,
528 const char *wmesg, sbintime_t sbt, sbintime_t pr, int flags);
529 #define msleep(chan, mtx, pri, wmesg, timo) \
530 _sleep((chan), &(mtx)->lock_object, (pri), (wmesg), \
531 tick_sbt * (timo), 0, C_HARDCLOCK)
532 #define msleep_sbt(chan, mtx, pri, wmesg, bt, pr, flags) \
533 _sleep((chan), &(mtx)->lock_object, (pri), (wmesg), (bt), (pr), \
535 int msleep_spin_sbt(const void * _Nonnull chan, struct mtx *mtx,
536 const char *wmesg, sbintime_t sbt, sbintime_t pr, int flags);
537 #define msleep_spin(chan, mtx, wmesg, timo) \
538 msleep_spin_sbt((chan), (mtx), (wmesg), tick_sbt * (timo), \
540 int pause_sbt(const char *wmesg, sbintime_t sbt, sbintime_t pr,
542 #define pause(wmesg, timo) \
543 pause_sbt((wmesg), tick_sbt * (timo), 0, C_HARDCLOCK)
544 #define pause_sig(wmesg, timo) \
545 pause_sbt((wmesg), tick_sbt * (timo), 0, C_HARDCLOCK | C_CATCH)
546 #define tsleep(chan, pri, wmesg, timo) \
547 _sleep((chan), NULL, (pri), (wmesg), tick_sbt * (timo), \
549 #define tsleep_sbt(chan, pri, wmesg, bt, pr, flags) \
550 _sleep((chan), NULL, (pri), (wmesg), (bt), (pr), (flags))
551 void wakeup(const void *chan);
552 void wakeup_one(const void *chan);
553 void wakeup_any(const void *chan);
556 * Common `struct cdev *' stuff are declared here to avoid #include poisoning
560 dev_t dev2udev(struct cdev *x);
561 const char *devtoname(struct cdev *cdev);
564 size_t devfs_iosize_max(void);
565 size_t iosize_max(void);
568 int poll_no_poll(int events);
570 /* XXX: Should be void nanodelay(u_int nsec); */
571 void DELAY(int usec);
573 /* Root mount holdback API */
574 struct root_hold_token {
577 TAILQ_ENTRY(root_hold_token) list;
580 struct root_hold_token *root_mount_hold(const char *identifier);
581 void root_mount_hold_token(const char *identifier, struct root_hold_token *h);
582 void root_mount_rel(struct root_hold_token *h);
583 int root_mounted(void);
586 * Unit number allocation API. (kern/subr_unit.c)
589 struct unrhdr *new_unrhdr(int low, int high, struct mtx *mutex);
590 void init_unrhdr(struct unrhdr *uh, int low, int high, struct mtx *mutex);
591 void delete_unrhdr(struct unrhdr *uh);
592 void clear_unrhdr(struct unrhdr *uh);
593 void clean_unrhdr(struct unrhdr *uh);
594 void clean_unrhdrl(struct unrhdr *uh);
595 int alloc_unr(struct unrhdr *uh);
596 int alloc_unr_specific(struct unrhdr *uh, u_int item);
597 int alloc_unrl(struct unrhdr *uh);
598 void free_unr(struct unrhdr *uh, u_int item);
609 new_unrhdr64(struct unrhdr64 *unr64, uint64_t low)
612 unr64->counter = low;
616 uint64_t alloc_unr64(struct unrhdr64 *);
618 static __inline uint64_t
619 alloc_unr64(struct unrhdr64 *unr64)
622 return (atomic_fetchadd_64(&unr64->counter, 1));
626 void intr_prof_stack_use(struct thread *td, struct trapframe *frame);
628 void counted_warning(unsigned *counter, const char *msg);
631 * APIs to manage deprecation and obsolescence.
634 void _gone_in(int major, const char *msg);
635 void _gone_in_dev(struct device *dev, int major, const char *msg);
636 #ifdef NO_OBSOLETE_CODE
637 #define __gone_ok(m, msg) \
638 _Static_assert(m < P_OSREL_MAJOR(__FreeBSD_version)), \
639 "Obsolete code: " msg);
641 #define __gone_ok(m, msg)
643 #define gone_in(major, msg) __gone_ok(major, msg) _gone_in(major, msg)
644 #define gone_in_dev(dev, major, msg) __gone_ok(major, msg) _gone_in_dev(dev, major, msg)
647 __NULLABILITY_PRAGMA_POP
649 #endif /* !_SYS_SYSTM_H_ */