1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 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. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 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. 23 * 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 34 * SUCH DAMAGE. 35 * 36 * @(#)systm.h 8.7 (Berkeley) 3/29/95 37 * $FreeBSD$ 38 */ 39 40 #ifndef _SYS_SYSTM_H_ 41 #define _SYS_SYSTM_H_ 42 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 */ 49 50 __NULLABILITY_PRAGMA_PUSH 51 52 extern int cold; /* nonzero if we are doing a cold boot */ 53 extern int suspend_blocked; /* block suspend due to pending shutdown */ 54 extern int rebooting; /* kern_reboot() has been called. */ 55 extern const char *panicstr; /* panic message */ 56 extern char version[]; /* system version */ 57 extern char compiler_version[]; /* compiler version */ 58 extern char copyright[]; /* system copyright */ 59 extern int kstack_pages; /* number of kernel stack pages */ 60 61 extern u_long pagesizes[]; /* supported page sizes */ 62 extern long physmem; /* physical memory */ 63 extern long realmem; /* 'real' memory */ 64 65 extern char *rootdevnames[2]; /* names of possible root devices */ 66 67 extern int boothowto; /* reboot flags, from console subsystem */ 68 extern int bootverbose; /* nonzero to print verbose messages */ 69 70 extern int maxusers; /* system tune hint */ 71 extern int ngroups_max; /* max # of supplemental groups */ 72 extern int vm_guest; /* Running as virtual machine guest? */ 73 74 /* 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[]. 79 */ 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 }; 83 84 /* 85 * These functions need to be declared before the KASSERT macro is invoked in 86 * !KASSERT_PANIC_OPTIONAL builds, so their declarations are sort of out of 87 * place compared to other function definitions in this header. On the other 88 * hand, this header is a bit disorganized anyway. 89 */ 90 void panic(const char *, ...) __dead2 __printflike(1, 2); 91 void vpanic(const char *, __va_list) __dead2 __printflike(1, 0); 92 93 #if defined(WITNESS) || defined(INVARIANT_SUPPORT) 94 #ifdef KASSERT_PANIC_OPTIONAL 95 void kassert_panic(const char *fmt, ...) __printflike(1, 2); 96 #else 97 #define kassert_panic panic 98 #endif 99 #endif 100 101 #ifdef INVARIANTS /* The option is always available */ 102 #define KASSERT(exp,msg) do { \ 103 if (__predict_false(!(exp))) \ 104 kassert_panic msg; \ 105 } while (0) 106 #define VNASSERT(exp, vp, msg) do { \ 107 if (__predict_false(!(exp))) { \ 108 vn_printf(vp, "VNASSERT failed\n"); \ 109 kassert_panic msg; \ 110 } \ 111 } while (0) 112 #else 113 #define KASSERT(exp,msg) do { \ 114 } while (0) 115 116 #define VNASSERT(exp, vp, msg) do { \ 117 } while (0) 118 #endif 119 120 #ifndef CTASSERT /* Allow lint to override */ 121 #define CTASSERT(x) _Static_assert(x, "compile-time assertion failed") 122 #endif 123 124 #if defined(_KERNEL) 125 #include <sys/param.h> /* MAXCPU */ 126 #include <sys/pcpu.h> /* curthread */ 127 #include <sys/kpilite.h> 128 #endif 129 130 /* 131 * Assert that a pointer can be loaded from memory atomically. 132 * 133 * This assertion enforces stronger alignment than necessary. For example, 134 * on some architectures, atomicity for unaligned loads will depend on 135 * whether or not the load spans multiple cache lines. 136 */ 137 #define ASSERT_ATOMIC_LOAD_PTR(var, msg) \ 138 KASSERT(sizeof(var) == sizeof(void *) && \ 139 ((uintptr_t)&(var) & (sizeof(void *) - 1)) == 0, msg) 140 141 /* 142 * Assert that a thread is in critical(9) section. 143 */ 144 #define CRITICAL_ASSERT(td) \ 145 KASSERT((td)->td_critnest >= 1, ("Not in critical section")); 146 147 /* 148 * If we have already panic'd and this is the thread that called 149 * panic(), then don't block on any mutexes but silently succeed. 150 * Otherwise, the kernel will deadlock since the scheduler isn't 151 * going to run the thread that holds any lock we need. 152 */ 153 #define SCHEDULER_STOPPED_TD(td) ({ \ 154 MPASS((td) == curthread); \ 155 __predict_false((td)->td_stopsched); \ 156 }) 157 #define SCHEDULER_STOPPED() SCHEDULER_STOPPED_TD(curthread) 158 159 /* 160 * Align variables. 161 */ 162 #define __read_mostly __section(".data.read_mostly") 163 #define __read_frequently __section(".data.read_frequently") 164 #define __exclusive_cache_line __aligned(CACHE_LINE_SIZE) \ 165 __section(".data.exclusive_cache_line") 166 /* 167 * XXX the hints declarations are even more misplaced than most declarations 168 * in this file, since they are needed in one file (per arch) and only used 169 * in two files. 170 * XXX most of these variables should be const. 171 */ 172 extern int osreldate; 173 extern bool dynamic_kenv; 174 extern struct mtx kenv_lock; 175 extern char *kern_envp; 176 extern char *md_envp; 177 extern char static_env[]; 178 extern char static_hints[]; /* by config for now */ 179 180 extern char **kenvp; 181 182 extern const void *zero_region; /* address space maps to a zeroed page */ 183 184 extern int unmapped_buf_allowed; 185 186 #ifdef __LP64__ 187 #define IOSIZE_MAX iosize_max() 188 #define DEVFS_IOSIZE_MAX devfs_iosize_max() 189 #else 190 #define IOSIZE_MAX SSIZE_MAX 191 #define DEVFS_IOSIZE_MAX SSIZE_MAX 192 #endif 193 194 /* 195 * General function declarations. 196 */ 197 198 struct inpcb; 199 struct lock_object; 200 struct malloc_type; 201 struct mtx; 202 struct proc; 203 struct socket; 204 struct thread; 205 struct tty; 206 struct ucred; 207 struct uio; 208 struct _jmp_buf; 209 struct trapframe; 210 struct eventtimer; 211 212 int setjmp(struct _jmp_buf *) __returns_twice; 213 void longjmp(struct _jmp_buf *, int) __dead2; 214 int dumpstatus(vm_offset_t addr, off_t count); 215 int nullop(void); 216 int eopnotsupp(void); 217 int ureadc(int, struct uio *); 218 void hashdestroy(void *, struct malloc_type *, u_long); 219 void *hashinit(int count, struct malloc_type *type, u_long *hashmask); 220 void *hashinit_flags(int count, struct malloc_type *type, 221 u_long *hashmask, int flags); 222 #define HASH_NOWAIT 0x00000001 223 #define HASH_WAITOK 0x00000002 224 225 void *phashinit(int count, struct malloc_type *type, u_long *nentries); 226 void *phashinit_flags(int count, struct malloc_type *type, u_long *nentries, 227 int flags); 228 void g_waitidle(void); 229 230 void cpu_boot(int); 231 void cpu_flush_dcache(void *, size_t); 232 void cpu_rootconf(void); 233 void critical_enter_KBI(void); 234 void critical_exit_KBI(void); 235 void critical_exit_preempt(void); 236 void init_param1(void); 237 void init_param2(long physpages); 238 void init_static_kenv(char *, size_t); 239 void tablefull(const char *); 240 241 /* 242 * Allocate per-thread "current" state in the linuxkpi 243 */ 244 extern int (*lkpi_alloc_current)(struct thread *, int); 245 int linux_alloc_current_noop(struct thread *, int); 246 247 248 #if defined(KLD_MODULE) || defined(KTR_CRITICAL) || !defined(_KERNEL) || defined(GENOFFSET) 249 #define critical_enter() critical_enter_KBI() 250 #define critical_exit() critical_exit_KBI() 251 #else 252 static __inline void 253 critical_enter(void) 254 { 255 struct thread_lite *td; 256 257 td = (struct thread_lite *)curthread; 258 td->td_critnest++; 259 __compiler_membar(); 260 } 261 262 static __inline void 263 critical_exit(void) 264 { 265 struct thread_lite *td; 266 267 td = (struct thread_lite *)curthread; 268 KASSERT(td->td_critnest != 0, 269 ("critical_exit: td_critnest == 0")); 270 __compiler_membar(); 271 td->td_critnest--; 272 __compiler_membar(); 273 if (__predict_false(td->td_owepreempt)) 274 critical_exit_preempt(); 275 276 } 277 #endif 278 279 280 #ifdef EARLY_PRINTF 281 typedef void early_putc_t(int ch); 282 extern early_putc_t *early_putc; 283 #endif 284 int kvprintf(char const *, void (*)(int, void*), void *, int, 285 __va_list) __printflike(1, 0); 286 void log(int, const char *, ...) __printflike(2, 3); 287 void log_console(struct uio *); 288 void vlog(int, const char *, __va_list) __printflike(2, 0); 289 int asprintf(char **ret, struct malloc_type *mtp, const char *format, 290 ...) __printflike(3, 4); 291 int printf(const char *, ...) __printflike(1, 2); 292 int snprintf(char *, size_t, const char *, ...) __printflike(3, 4); 293 int sprintf(char *buf, const char *, ...) __printflike(2, 3); 294 int uprintf(const char *, ...) __printflike(1, 2); 295 int vprintf(const char *, __va_list) __printflike(1, 0); 296 int vasprintf(char **ret, struct malloc_type *mtp, const char *format, 297 __va_list ap) __printflike(3, 0); 298 int vsnprintf(char *, size_t, const char *, __va_list) __printflike(3, 0); 299 int vsnrprintf(char *, size_t, int, const char *, __va_list) __printflike(4, 0); 300 int vsprintf(char *buf, const char *, __va_list) __printflike(2, 0); 301 int sscanf(const char *, char const * _Nonnull, ...) __scanflike(2, 3); 302 int vsscanf(const char * _Nonnull, char const * _Nonnull, __va_list) __scanflike(2, 0); 303 long strtol(const char *, char **, int); 304 u_long strtoul(const char *, char **, int); 305 quad_t strtoq(const char *, char **, int); 306 u_quad_t strtouq(const char *, char **, int); 307 void tprintf(struct proc *p, int pri, const char *, ...) __printflike(3, 4); 308 void vtprintf(struct proc *, int, const char *, __va_list) __printflike(3, 0); 309 void hexdump(const void *ptr, int length, const char *hdr, int flags); 310 #define HD_COLUMN_MASK 0xff 311 #define HD_DELIM_MASK 0xff00 312 #define HD_OMIT_COUNT (1 << 16) 313 #define HD_OMIT_HEX (1 << 17) 314 #define HD_OMIT_CHARS (1 << 18) 315 316 #define ovbcopy(f, t, l) bcopy((f), (t), (l)) 317 void bcopy(const void * _Nonnull from, void * _Nonnull to, size_t len); 318 #define bcopy(from, to, len) __builtin_memmove((to), (from), (len)) 319 void bzero(void * _Nonnull buf, size_t len); 320 #define bzero(buf, len) __builtin_memset((buf), 0, (len)) 321 void explicit_bzero(void * _Nonnull, size_t); 322 int bcmp(const void *b1, const void *b2, size_t len); 323 #define bcmp(b1, b2, len) __builtin_memcmp((b1), (b2), (len)) 324 325 void *memset(void * _Nonnull buf, int c, size_t len); 326 #define memset(buf, c, len) __builtin_memset((buf), (c), (len)) 327 void *memcpy(void * _Nonnull to, const void * _Nonnull from, size_t len); 328 #define memcpy(to, from, len) __builtin_memcpy((to), (from), (len)) 329 void *memmove(void * _Nonnull dest, const void * _Nonnull src, size_t n); 330 #define memmove(dest, src, n) __builtin_memmove((dest), (src), (n)) 331 int memcmp(const void *b1, const void *b2, size_t len); 332 #define memcmp(b1, b2, len) __builtin_memcmp((b1), (b2), (len)) 333 334 void *memset_early(void * _Nonnull buf, int c, size_t len); 335 #define bzero_early(buf, len) memset_early((buf), 0, (len)) 336 void *memcpy_early(void * _Nonnull to, const void * _Nonnull from, size_t len); 337 void *memmove_early(void * _Nonnull dest, const void * _Nonnull src, size_t n); 338 #define bcopy_early(from, to, len) memmove_early((to), (from), (len)) 339 340 int copystr(const void * _Nonnull __restrict kfaddr, 341 void * _Nonnull __restrict kdaddr, size_t len, 342 size_t * __restrict lencopied); 343 int copyinstr(const void * __restrict udaddr, 344 void * _Nonnull __restrict kaddr, size_t len, 345 size_t * __restrict lencopied); 346 int copyin(const void * __restrict udaddr, 347 void * _Nonnull __restrict kaddr, size_t len); 348 int copyin_nofault(const void * __restrict udaddr, 349 void * _Nonnull __restrict kaddr, size_t len); 350 int copyout(const void * _Nonnull __restrict kaddr, 351 void * __restrict udaddr, size_t len); 352 int copyout_nofault(const void * _Nonnull __restrict kaddr, 353 void * __restrict udaddr, size_t len); 354 355 int fubyte(volatile const void *base); 356 long fuword(volatile const void *base); 357 int fuword16(volatile const void *base); 358 int32_t fuword32(volatile const void *base); 359 int64_t fuword64(volatile const void *base); 360 int fueword(volatile const void *base, long *val); 361 int fueword32(volatile const void *base, int32_t *val); 362 int fueword64(volatile const void *base, int64_t *val); 363 int subyte(volatile void *base, int byte); 364 int suword(volatile void *base, long word); 365 int suword16(volatile void *base, int word); 366 int suword32(volatile void *base, int32_t word); 367 int suword64(volatile void *base, int64_t word); 368 uint32_t casuword32(volatile uint32_t *base, uint32_t oldval, uint32_t newval); 369 u_long casuword(volatile u_long *p, u_long oldval, u_long newval); 370 int casueword32(volatile uint32_t *base, uint32_t oldval, uint32_t *oldvalp, 371 uint32_t newval); 372 int casueword(volatile u_long *p, u_long oldval, u_long *oldvalp, 373 u_long newval); 374 375 void realitexpire(void *); 376 377 int sysbeep(int hertz, int period); 378 379 void hardclock(int cnt, int usermode); 380 void hardclock_sync(int cpu); 381 void softclock(void *); 382 void statclock(int cnt, int usermode); 383 void profclock(int cnt, int usermode, uintfptr_t pc); 384 385 int hardclockintr(void); 386 387 void startprofclock(struct proc *); 388 void stopprofclock(struct proc *); 389 void cpu_startprofclock(void); 390 void cpu_stopprofclock(void); 391 void suspendclock(void); 392 void resumeclock(void); 393 sbintime_t cpu_idleclock(void); 394 void cpu_activeclock(void); 395 void cpu_new_callout(int cpu, sbintime_t bt, sbintime_t bt_opt); 396 void cpu_et_frequency(struct eventtimer *et, uint64_t newfreq); 397 extern int cpu_disable_c2_sleep; 398 extern int cpu_disable_c3_sleep; 399 400 char *kern_getenv(const char *name); 401 void freeenv(char *env); 402 int getenv_int(const char *name, int *data); 403 int getenv_uint(const char *name, unsigned int *data); 404 int getenv_long(const char *name, long *data); 405 int getenv_ulong(const char *name, unsigned long *data); 406 int getenv_string(const char *name, char *data, int size); 407 int getenv_int64(const char *name, int64_t *data); 408 int getenv_uint64(const char *name, uint64_t *data); 409 int getenv_quad(const char *name, quad_t *data); 410 int kern_setenv(const char *name, const char *value); 411 int kern_unsetenv(const char *name); 412 int testenv(const char *name); 413 414 int getenv_array(const char *name, void *data, int size, int *psize, 415 int type_size, bool allow_signed); 416 #define GETENV_UNSIGNED false /* negative numbers not allowed */ 417 #define GETENV_SIGNED true /* negative numbers allowed */ 418 419 typedef uint64_t (cpu_tick_f)(void); 420 void set_cputicker(cpu_tick_f *func, uint64_t freq, unsigned var); 421 extern cpu_tick_f *cpu_ticks; 422 uint64_t cpu_tickrate(void); 423 uint64_t cputick2usec(uint64_t tick); 424 425 #ifdef APM_FIXUP_CALLTODO 426 struct timeval; 427 void adjust_timeout_calltodo(struct timeval *time_change); 428 #endif /* APM_FIXUP_CALLTODO */ 429 430 #include <sys/libkern.h> 431 432 /* Initialize the world */ 433 void consinit(void); 434 void cpu_initclocks(void); 435 void cpu_initclocks_bsp(void); 436 void cpu_initclocks_ap(void); 437 void usrinfoinit(void); 438 439 /* Finalize the world */ 440 void kern_reboot(int) __dead2; 441 void shutdown_nice(int); 442 443 /* Timeouts */ 444 typedef void timeout_t(void *); /* timeout function type */ 445 #define CALLOUT_HANDLE_INITIALIZER(handle) \ 446 { NULL } 447 448 void callout_handle_init(struct callout_handle *); 449 struct callout_handle timeout(timeout_t *, void *, int); 450 void untimeout(timeout_t *, void *, struct callout_handle); 451 452 /* Stubs for obsolete functions that used to be for interrupt management */ 453 static __inline intrmask_t splbio(void) { return 0; } 454 static __inline intrmask_t splcam(void) { return 0; } 455 static __inline intrmask_t splclock(void) { return 0; } 456 static __inline intrmask_t splhigh(void) { return 0; } 457 static __inline intrmask_t splimp(void) { return 0; } 458 static __inline intrmask_t splnet(void) { return 0; } 459 static __inline intrmask_t spltty(void) { return 0; } 460 static __inline void splx(intrmask_t ipl __unused) { return; } 461 462 /* 463 * Common `proc' functions are declared here so that proc.h can be included 464 * less often. 465 */ 466 int _sleep(void * _Nonnull chan, struct lock_object *lock, int pri, 467 const char *wmesg, sbintime_t sbt, sbintime_t pr, int flags); 468 #define msleep(chan, mtx, pri, wmesg, timo) \ 469 _sleep((chan), &(mtx)->lock_object, (pri), (wmesg), \ 470 tick_sbt * (timo), 0, C_HARDCLOCK) 471 #define msleep_sbt(chan, mtx, pri, wmesg, bt, pr, flags) \ 472 _sleep((chan), &(mtx)->lock_object, (pri), (wmesg), (bt), (pr), \ 473 (flags)) 474 int msleep_spin_sbt(void * _Nonnull chan, struct mtx *mtx, 475 const char *wmesg, sbintime_t sbt, sbintime_t pr, int flags); 476 #define msleep_spin(chan, mtx, wmesg, timo) \ 477 msleep_spin_sbt((chan), (mtx), (wmesg), tick_sbt * (timo), \ 478 0, C_HARDCLOCK) 479 int pause_sbt(const char *wmesg, sbintime_t sbt, sbintime_t pr, 480 int flags); 481 #define pause(wmesg, timo) \ 482 pause_sbt((wmesg), tick_sbt * (timo), 0, C_HARDCLOCK) 483 #define pause_sig(wmesg, timo) \ 484 pause_sbt((wmesg), tick_sbt * (timo), 0, C_HARDCLOCK | C_CATCH) 485 #define tsleep(chan, pri, wmesg, timo) \ 486 _sleep((chan), NULL, (pri), (wmesg), tick_sbt * (timo), \ 487 0, C_HARDCLOCK) 488 #define tsleep_sbt(chan, pri, wmesg, bt, pr, flags) \ 489 _sleep((chan), NULL, (pri), (wmesg), (bt), (pr), (flags)) 490 void wakeup(void * chan); 491 void wakeup_one(void * chan); 492 void wakeup_any(void * chan); 493 494 /* 495 * Common `struct cdev *' stuff are declared here to avoid #include poisoning 496 */ 497 498 struct cdev; 499 dev_t dev2udev(struct cdev *x); 500 const char *devtoname(struct cdev *cdev); 501 502 #ifdef __LP64__ 503 size_t devfs_iosize_max(void); 504 size_t iosize_max(void); 505 #endif 506 507 int poll_no_poll(int events); 508 509 /* XXX: Should be void nanodelay(u_int nsec); */ 510 void DELAY(int usec); 511 512 /* Root mount holdback API */ 513 struct root_hold_token; 514 515 struct root_hold_token *root_mount_hold(const char *identifier); 516 void root_mount_rel(struct root_hold_token *h); 517 int root_mounted(void); 518 519 520 /* 521 * Unit number allocation API. (kern/subr_unit.c) 522 */ 523 struct unrhdr; 524 struct unrhdr *new_unrhdr(int low, int high, struct mtx *mutex); 525 void init_unrhdr(struct unrhdr *uh, int low, int high, struct mtx *mutex); 526 void delete_unrhdr(struct unrhdr *uh); 527 void clear_unrhdr(struct unrhdr *uh); 528 void clean_unrhdr(struct unrhdr *uh); 529 void clean_unrhdrl(struct unrhdr *uh); 530 int alloc_unr(struct unrhdr *uh); 531 int alloc_unr_specific(struct unrhdr *uh, u_int item); 532 int alloc_unrl(struct unrhdr *uh); 533 void free_unr(struct unrhdr *uh, u_int item); 534 535 #ifndef __LP64__ 536 #define UNR64_LOCKED 537 #endif 538 539 struct unrhdr64 { 540 uint64_t counter; 541 }; 542 543 static __inline void 544 new_unrhdr64(struct unrhdr64 *unr64, uint64_t low) 545 { 546 547 unr64->counter = low; 548 } 549 550 #ifdef UNR64_LOCKED 551 uint64_t alloc_unr64(struct unrhdr64 *); 552 #else 553 static __inline uint64_t 554 alloc_unr64(struct unrhdr64 *unr64) 555 { 556 557 return (atomic_fetchadd_64(&unr64->counter, 1)); 558 } 559 #endif 560 561 void intr_prof_stack_use(struct thread *td, struct trapframe *frame); 562 563 void counted_warning(unsigned *counter, const char *msg); 564 565 /* 566 * APIs to manage deprecation and obsolescence. 567 */ 568 struct device; 569 void _gone_in(int major, const char *msg); 570 void _gone_in_dev(struct device *dev, int major, const char *msg); 571 #ifdef NO_OBSOLETE_CODE 572 #define __gone_ok(m, msg) \ 573 _Static_assert(m < P_OSREL_MAJOR(__FreeBSD_version)), \ 574 "Obsolete code" msg); 575 #else 576 #define __gone_ok(m, msg) 577 #endif 578 #define gone_in(major, msg) __gone_ok(major, msg) _gone_in(major, msg) 579 #define gone_in_dev(dev, major, msg) __gone_ok(major, msg) _gone_in_dev(dev, major, msg) 580 581 __NULLABILITY_PRAGMA_POP 582 583 #endif /* !_SYS_SYSTM_H_ */ 584