mutex.h revision 315378
1/*- 2 * Copyright (c) 1997 Berkeley Software Design, Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 3. Berkeley Software Design Inc's name may not be used to endorse or 13 * promote products derived from this software without specific prior 14 * written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN INC ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL BERKELEY SOFTWARE DESIGN INC BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * from BSDI $Id: mutex.h,v 2.7.2.35 2000/04/27 03:10:26 cp Exp $ 29 * $FreeBSD: stable/11/sys/sys/mutex.h 315378 2017-03-16 06:45:36Z mjg $ 30 */ 31 32#ifndef _SYS_MUTEX_H_ 33#define _SYS_MUTEX_H_ 34 35#include <sys/queue.h> 36#include <sys/_lock.h> 37#include <sys/_mutex.h> 38 39#ifdef _KERNEL 40#include <sys/pcpu.h> 41#include <sys/lock_profile.h> 42#include <sys/lockstat.h> 43#include <machine/atomic.h> 44#include <machine/cpufunc.h> 45 46/* 47 * Mutex types and options passed to mtx_init(). MTX_QUIET and MTX_DUPOK 48 * can also be passed in. 49 */ 50#define MTX_DEF 0x00000000 /* DEFAULT (sleep) lock */ 51#define MTX_SPIN 0x00000001 /* Spin lock (disables interrupts) */ 52#define MTX_RECURSE 0x00000004 /* Option: lock allowed to recurse */ 53#define MTX_NOWITNESS 0x00000008 /* Don't do any witness checking. */ 54#define MTX_NOPROFILE 0x00000020 /* Don't profile this lock */ 55#define MTX_NEW 0x00000040 /* Don't check for double-init */ 56 57/* 58 * Option flags passed to certain lock/unlock routines, through the use 59 * of corresponding mtx_{lock,unlock}_flags() interface macros. 60 */ 61#define MTX_QUIET LOP_QUIET /* Don't log a mutex event */ 62#define MTX_DUPOK LOP_DUPOK /* Don't log a duplicate acquire */ 63 64/* 65 * State bits kept in mutex->mtx_lock, for the DEFAULT lock type. None of this, 66 * with the exception of MTX_UNOWNED, applies to spin locks. 67 */ 68#define MTX_RECURSED 0x00000001 /* lock recursed (for MTX_DEF only) */ 69#define MTX_CONTESTED 0x00000002 /* lock contested (for MTX_DEF only) */ 70#define MTX_UNOWNED 0x00000004 /* Cookie for free mutex */ 71#define MTX_FLAGMASK (MTX_RECURSED | MTX_CONTESTED | MTX_UNOWNED) 72 73/* 74 * Value stored in mutex->mtx_lock to denote a destroyed mutex. 75 */ 76#define MTX_DESTROYED (MTX_CONTESTED | MTX_UNOWNED) 77 78/* 79 * Prototypes 80 * 81 * NOTE: Functions prepended with `_' (underscore) are exported to other parts 82 * of the kernel via macros, thus allowing us to use the cpp LOCK_FILE 83 * and LOCK_LINE or for hiding the lock cookie crunching to the 84 * consumers. These functions should not be called directly by any 85 * code using the API. Their macros cover their functionality. 86 * Functions with a `_' suffix are the entrypoint for the common 87 * KPI covering both compat shims and fast path case. These can be 88 * used by consumers willing to pass options, file and line 89 * informations, in an option-independent way. 90 * 91 * [See below for descriptions] 92 * 93 */ 94void _mtx_init(volatile uintptr_t *c, const char *name, const char *type, 95 int opts); 96void _mtx_destroy(volatile uintptr_t *c); 97void mtx_sysinit(void *arg); 98int _mtx_trylock_flags_(volatile uintptr_t *c, int opts, const char *file, 99 int line); 100void mutex_init(void); 101void __mtx_lock_sleep(volatile uintptr_t *c, uintptr_t v, uintptr_t tid, 102 int opts, const char *file, int line); 103void __mtx_unlock_sleep(volatile uintptr_t *c, int opts, const char *file, 104 int line); 105#ifdef SMP 106void _mtx_lock_spin_cookie(volatile uintptr_t *c, uintptr_t v, uintptr_t tid, 107 int opts, const char *file, int line); 108#endif 109void __mtx_lock_flags(volatile uintptr_t *c, int opts, const char *file, 110 int line); 111void __mtx_unlock_flags(volatile uintptr_t *c, int opts, const char *file, 112 int line); 113void __mtx_lock_spin_flags(volatile uintptr_t *c, int opts, const char *file, 114 int line); 115int __mtx_trylock_spin_flags(volatile uintptr_t *c, int opts, 116 const char *file, int line); 117void __mtx_unlock_spin_flags(volatile uintptr_t *c, int opts, 118 const char *file, int line); 119#if defined(INVARIANTS) || defined(INVARIANT_SUPPORT) 120void __mtx_assert(const volatile uintptr_t *c, int what, const char *file, 121 int line); 122#endif 123void thread_lock_flags_(struct thread *, int, const char *, int); 124 125#define thread_lock(tdp) \ 126 thread_lock_flags_((tdp), 0, __FILE__, __LINE__) 127#define thread_lock_flags(tdp, opt) \ 128 thread_lock_flags_((tdp), (opt), __FILE__, __LINE__) 129#define thread_unlock(tdp) \ 130 mtx_unlock_spin((tdp)->td_lock) 131 132/* 133 * Top-level macros to provide lock cookie once the actual mtx is passed. 134 * They will also prevent passing a malformed object to the mtx KPI by 135 * failing compilation as the mtx_lock reserved member will not be found. 136 */ 137#define mtx_init(m, n, t, o) \ 138 _mtx_init(&(m)->mtx_lock, n, t, o) 139#define mtx_destroy(m) \ 140 _mtx_destroy(&(m)->mtx_lock) 141#define mtx_trylock_flags_(m, o, f, l) \ 142 _mtx_trylock_flags_(&(m)->mtx_lock, o, f, l) 143#define _mtx_lock_sleep(m, v, t, o, f, l) \ 144 __mtx_lock_sleep(&(m)->mtx_lock, v, t, o, f, l) 145#define _mtx_unlock_sleep(m, o, f, l) \ 146 __mtx_unlock_sleep(&(m)->mtx_lock, o, f, l) 147#ifdef SMP 148#define _mtx_lock_spin(m, v, t, o, f, l) \ 149 _mtx_lock_spin_cookie(&(m)->mtx_lock, v, t, o, f, l) 150#endif 151#define _mtx_lock_flags(m, o, f, l) \ 152 __mtx_lock_flags(&(m)->mtx_lock, o, f, l) 153#define _mtx_unlock_flags(m, o, f, l) \ 154 __mtx_unlock_flags(&(m)->mtx_lock, o, f, l) 155#define _mtx_lock_spin_flags(m, o, f, l) \ 156 __mtx_lock_spin_flags(&(m)->mtx_lock, o, f, l) 157#define _mtx_trylock_spin_flags(m, o, f, l) \ 158 __mtx_trylock_spin_flags(&(m)->mtx_lock, o, f, l) 159#define _mtx_unlock_spin_flags(m, o, f, l) \ 160 __mtx_unlock_spin_flags(&(m)->mtx_lock, o, f, l) 161#if defined(INVARIANTS) || defined(INVARIANT_SUPPORT) 162#define _mtx_assert(m, w, f, l) \ 163 __mtx_assert(&(m)->mtx_lock, w, f, l) 164#endif 165 166#define mtx_recurse lock_object.lo_data 167 168/* Very simple operations on mtx_lock. */ 169 170/* Try to obtain mtx_lock once. */ 171#define _mtx_obtain_lock(mp, tid) \ 172 atomic_cmpset_acq_ptr(&(mp)->mtx_lock, MTX_UNOWNED, (tid)) 173 174#define _mtx_obtain_lock_fetch(mp, vp, tid) \ 175 atomic_fcmpset_acq_ptr(&(mp)->mtx_lock, vp, (tid)) 176 177/* Try to release mtx_lock if it is unrecursed and uncontested. */ 178#define _mtx_release_lock(mp, tid) \ 179 atomic_cmpset_rel_ptr(&(mp)->mtx_lock, (tid), MTX_UNOWNED) 180 181/* Release mtx_lock quickly, assuming we own it. */ 182#define _mtx_release_lock_quick(mp) \ 183 atomic_store_rel_ptr(&(mp)->mtx_lock, MTX_UNOWNED) 184 185/* 186 * Full lock operations that are suitable to be inlined in non-debug 187 * kernels. If the lock cannot be acquired or released trivially then 188 * the work is deferred to another function. 189 */ 190 191/* Lock a normal mutex. */ 192#define __mtx_lock(mp, tid, opts, file, line) do { \ 193 uintptr_t _tid = (uintptr_t)(tid); \ 194 uintptr_t _v = MTX_UNOWNED; \ 195 \ 196 if (__predict_false(LOCKSTAT_PROFILE_ENABLED(adaptive__acquire) ||\ 197 !_mtx_obtain_lock_fetch((mp), &_v, _tid))) \ 198 _mtx_lock_sleep((mp), _v, _tid, (opts), (file), (line));\ 199} while (0) 200 201/* 202 * Lock a spin mutex. For spinlocks, we handle recursion inline (it 203 * turns out that function calls can be significantly expensive on 204 * some architectures). Since spin locks are not _too_ common, 205 * inlining this code is not too big a deal. 206 */ 207#ifdef SMP 208#define __mtx_lock_spin(mp, tid, opts, file, line) do { \ 209 uintptr_t _tid = (uintptr_t)(tid); \ 210 uintptr_t _v = MTX_UNOWNED; \ 211 \ 212 spinlock_enter(); \ 213 if (!_mtx_obtain_lock_fetch((mp), &_v, _tid)) \ 214 _mtx_lock_spin((mp), _v, _tid, (opts), (file), (line)); \ 215 else \ 216 LOCKSTAT_PROFILE_OBTAIN_LOCK_SUCCESS(spin__acquire, \ 217 mp, 0, 0, file, line); \ 218} while (0) 219#define __mtx_trylock_spin(mp, tid, opts, file, line) __extension__ ({ \ 220 uintptr_t _tid = (uintptr_t)(tid); \ 221 int _ret; \ 222 \ 223 spinlock_enter(); \ 224 if (((mp)->mtx_lock != MTX_UNOWNED || !_mtx_obtain_lock((mp), _tid))) {\ 225 spinlock_exit(); \ 226 _ret = 0; \ 227 } else { \ 228 LOCKSTAT_PROFILE_OBTAIN_LOCK_SUCCESS(spin__acquire, \ 229 mp, 0, 0, file, line); \ 230 _ret = 1; \ 231 } \ 232 _ret; \ 233}) 234#else /* SMP */ 235#define __mtx_lock_spin(mp, tid, opts, file, line) do { \ 236 uintptr_t _tid = (uintptr_t)(tid); \ 237 \ 238 spinlock_enter(); \ 239 if ((mp)->mtx_lock == _tid) \ 240 (mp)->mtx_recurse++; \ 241 else { \ 242 KASSERT((mp)->mtx_lock == MTX_UNOWNED, ("corrupt spinlock")); \ 243 (mp)->mtx_lock = _tid; \ 244 } \ 245} while (0) 246#define __mtx_trylock_spin(mp, tid, opts, file, line) __extension__ ({ \ 247 uintptr_t _tid = (uintptr_t)(tid); \ 248 int _ret; \ 249 \ 250 spinlock_enter(); \ 251 if ((mp)->mtx_lock != MTX_UNOWNED) { \ 252 spinlock_exit(); \ 253 _ret = 0; \ 254 } else { \ 255 (mp)->mtx_lock = _tid; \ 256 _ret = 1; \ 257 } \ 258 _ret; \ 259}) 260#endif /* SMP */ 261 262/* Unlock a normal mutex. */ 263#define __mtx_unlock(mp, tid, opts, file, line) do { \ 264 uintptr_t _tid = (uintptr_t)(tid); \ 265 \ 266 if (__predict_false(LOCKSTAT_PROFILE_ENABLED(adaptive__release) ||\ 267 !_mtx_release_lock((mp), _tid))) \ 268 _mtx_unlock_sleep((mp), (opts), (file), (line)); \ 269} while (0) 270 271/* 272 * Unlock a spin mutex. For spinlocks, we can handle everything 273 * inline, as it's pretty simple and a function call would be too 274 * expensive (at least on some architectures). Since spin locks are 275 * not _too_ common, inlining this code is not too big a deal. 276 * 277 * Since we always perform a spinlock_enter() when attempting to acquire a 278 * spin lock, we need to always perform a matching spinlock_exit() when 279 * releasing a spin lock. This includes the recursion cases. 280 */ 281#ifdef SMP 282#define __mtx_unlock_spin(mp) do { \ 283 if (mtx_recursed((mp))) \ 284 (mp)->mtx_recurse--; \ 285 else { \ 286 LOCKSTAT_PROFILE_RELEASE_LOCK(spin__release, mp); \ 287 _mtx_release_lock_quick((mp)); \ 288 } \ 289 spinlock_exit(); \ 290} while (0) 291#else /* SMP */ 292#define __mtx_unlock_spin(mp) do { \ 293 if (mtx_recursed((mp))) \ 294 (mp)->mtx_recurse--; \ 295 else { \ 296 LOCKSTAT_PROFILE_RELEASE_LOCK(spin__release, mp); \ 297 (mp)->mtx_lock = MTX_UNOWNED; \ 298 } \ 299 spinlock_exit(); \ 300} while (0) 301#endif /* SMP */ 302 303/* 304 * Exported lock manipulation interface. 305 * 306 * mtx_lock(m) locks MTX_DEF mutex `m' 307 * 308 * mtx_lock_spin(m) locks MTX_SPIN mutex `m' 309 * 310 * mtx_unlock(m) unlocks MTX_DEF mutex `m' 311 * 312 * mtx_unlock_spin(m) unlocks MTX_SPIN mutex `m' 313 * 314 * mtx_lock_spin_flags(m, opts) and mtx_lock_flags(m, opts) locks mutex `m' 315 * and passes option flags `opts' to the "hard" function, if required. 316 * With these routines, it is possible to pass flags such as MTX_QUIET 317 * to the appropriate lock manipulation routines. 318 * 319 * mtx_trylock(m) attempts to acquire MTX_DEF mutex `m' but doesn't sleep if 320 * it cannot. Rather, it returns 0 on failure and non-zero on success. 321 * It does NOT handle recursion as we assume that if a caller is properly 322 * using this part of the interface, he will know that the lock in question 323 * is _not_ recursed. 324 * 325 * mtx_trylock_flags(m, opts) is used the same way as mtx_trylock() but accepts 326 * relevant option flags `opts.' 327 * 328 * mtx_trylock_spin(m) attempts to acquire MTX_SPIN mutex `m' but doesn't 329 * spin if it cannot. Rather, it returns 0 on failure and non-zero on 330 * success. It always returns failure for recursed lock attempts. 331 * 332 * mtx_initialized(m) returns non-zero if the lock `m' has been initialized. 333 * 334 * mtx_owned(m) returns non-zero if the current thread owns the lock `m' 335 * 336 * mtx_recursed(m) returns non-zero if the lock `m' is presently recursed. 337 */ 338#define mtx_lock(m) mtx_lock_flags((m), 0) 339#define mtx_lock_spin(m) mtx_lock_spin_flags((m), 0) 340#define mtx_trylock(m) mtx_trylock_flags((m), 0) 341#define mtx_trylock_spin(m) mtx_trylock_spin_flags((m), 0) 342#define mtx_unlock(m) mtx_unlock_flags((m), 0) 343#define mtx_unlock_spin(m) mtx_unlock_spin_flags((m), 0) 344 345struct mtx_pool; 346 347struct mtx_pool *mtx_pool_create(const char *mtx_name, int pool_size, int opts); 348void mtx_pool_destroy(struct mtx_pool **poolp); 349struct mtx *mtx_pool_find(struct mtx_pool *pool, void *ptr); 350struct mtx *mtx_pool_alloc(struct mtx_pool *pool); 351#define mtx_pool_lock(pool, ptr) \ 352 mtx_lock(mtx_pool_find((pool), (ptr))) 353#define mtx_pool_lock_spin(pool, ptr) \ 354 mtx_lock_spin(mtx_pool_find((pool), (ptr))) 355#define mtx_pool_unlock(pool, ptr) \ 356 mtx_unlock(mtx_pool_find((pool), (ptr))) 357#define mtx_pool_unlock_spin(pool, ptr) \ 358 mtx_unlock_spin(mtx_pool_find((pool), (ptr))) 359 360/* 361 * mtxpool_sleep is a general purpose pool of sleep mutexes. 362 */ 363extern struct mtx_pool *mtxpool_sleep; 364 365#ifndef LOCK_DEBUG 366#error LOCK_DEBUG not defined, include <sys/lock.h> before <sys/mutex.h> 367#endif 368#if LOCK_DEBUG > 0 || defined(MUTEX_NOINLINE) 369#define mtx_lock_flags_(m, opts, file, line) \ 370 _mtx_lock_flags((m), (opts), (file), (line)) 371#define mtx_unlock_flags_(m, opts, file, line) \ 372 _mtx_unlock_flags((m), (opts), (file), (line)) 373#define mtx_lock_spin_flags_(m, opts, file, line) \ 374 _mtx_lock_spin_flags((m), (opts), (file), (line)) 375#define mtx_trylock_spin_flags_(m, opts, file, line) \ 376 _mtx_trylock_spin_flags((m), (opts), (file), (line)) 377#define mtx_unlock_spin_flags_(m, opts, file, line) \ 378 _mtx_unlock_spin_flags((m), (opts), (file), (line)) 379#else /* LOCK_DEBUG == 0 && !MUTEX_NOINLINE */ 380#define mtx_lock_flags_(m, opts, file, line) \ 381 __mtx_lock((m), curthread, (opts), (file), (line)) 382#define mtx_unlock_flags_(m, opts, file, line) \ 383 __mtx_unlock((m), curthread, (opts), (file), (line)) 384#define mtx_lock_spin_flags_(m, opts, file, line) \ 385 __mtx_lock_spin((m), curthread, (opts), (file), (line)) 386#define mtx_trylock_spin_flags_(m, opts, file, line) \ 387 __mtx_trylock_spin((m), curthread, (opts), (file), (line)) 388#define mtx_unlock_spin_flags_(m, opts, file, line) \ 389 __mtx_unlock_spin((m)) 390#endif /* LOCK_DEBUG > 0 || MUTEX_NOINLINE */ 391 392#ifdef INVARIANTS 393#define mtx_assert_(m, what, file, line) \ 394 _mtx_assert((m), (what), (file), (line)) 395 396#define GIANT_REQUIRED mtx_assert_(&Giant, MA_OWNED, __FILE__, __LINE__) 397 398#else /* INVARIANTS */ 399#define mtx_assert_(m, what, file, line) (void)0 400#define GIANT_REQUIRED 401#endif /* INVARIANTS */ 402 403#define mtx_lock_flags(m, opts) \ 404 mtx_lock_flags_((m), (opts), LOCK_FILE, LOCK_LINE) 405#define mtx_unlock_flags(m, opts) \ 406 mtx_unlock_flags_((m), (opts), LOCK_FILE, LOCK_LINE) 407#define mtx_lock_spin_flags(m, opts) \ 408 mtx_lock_spin_flags_((m), (opts), LOCK_FILE, LOCK_LINE) 409#define mtx_unlock_spin_flags(m, opts) \ 410 mtx_unlock_spin_flags_((m), (opts), LOCK_FILE, LOCK_LINE) 411#define mtx_trylock_flags(m, opts) \ 412 mtx_trylock_flags_((m), (opts), LOCK_FILE, LOCK_LINE) 413#define mtx_trylock_spin_flags(m, opts) \ 414 mtx_trylock_spin_flags_((m), (opts), LOCK_FILE, LOCK_LINE) 415#define mtx_assert(m, what) \ 416 mtx_assert_((m), (what), __FILE__, __LINE__) 417 418#define mtx_sleep(chan, mtx, pri, wmesg, timo) \ 419 _sleep((chan), &(mtx)->lock_object, (pri), (wmesg), \ 420 tick_sbt * (timo), 0, C_HARDCLOCK) 421 422#define MTX_READ_VALUE(m) ((m)->mtx_lock) 423 424#define mtx_initialized(m) lock_initialized(&(m)->lock_object) 425 426#define lv_mtx_owner(v) ((struct thread *)((v) & ~MTX_FLAGMASK)) 427 428#define mtx_owner(m) lv_mtx_owner(MTX_READ_VALUE(m)) 429 430#define mtx_owned(m) (mtx_owner(m) == curthread) 431 432#define mtx_recursed(m) ((m)->mtx_recurse != 0) 433 434#define mtx_name(m) ((m)->lock_object.lo_name) 435 436/* 437 * Global locks. 438 */ 439extern struct mtx Giant; 440extern struct mtx blocked_lock; 441 442/* 443 * Giant lock manipulation and clean exit macros. 444 * Used to replace return with an exit Giant and return. 445 * 446 * Note that DROP_GIANT*() needs to be paired with PICKUP_GIANT() 447 * The #ifndef is to allow lint-like tools to redefine DROP_GIANT. 448 */ 449#ifndef DROP_GIANT 450#define DROP_GIANT() \ 451do { \ 452 int _giantcnt = 0; \ 453 WITNESS_SAVE_DECL(Giant); \ 454 \ 455 if (mtx_owned(&Giant)) { \ 456 WITNESS_SAVE(&Giant.lock_object, Giant); \ 457 for (_giantcnt = 0; mtx_owned(&Giant) && \ 458 !SCHEDULER_STOPPED(); _giantcnt++) \ 459 mtx_unlock(&Giant); \ 460 } 461 462#define PICKUP_GIANT() \ 463 PARTIAL_PICKUP_GIANT(); \ 464} while (0) 465 466#define PARTIAL_PICKUP_GIANT() \ 467 mtx_assert(&Giant, MA_NOTOWNED); \ 468 if (_giantcnt > 0) { \ 469 while (_giantcnt--) \ 470 mtx_lock(&Giant); \ 471 WITNESS_RESTORE(&Giant.lock_object, Giant); \ 472 } 473#endif 474 475struct mtx_args { 476 void *ma_mtx; 477 const char *ma_desc; 478 int ma_opts; 479}; 480 481#define MTX_SYSINIT(name, mtx, desc, opts) \ 482 static struct mtx_args name##_args = { \ 483 (mtx), \ 484 (desc), \ 485 (opts) \ 486 }; \ 487 SYSINIT(name##_mtx_sysinit, SI_SUB_LOCK, SI_ORDER_MIDDLE, \ 488 mtx_sysinit, &name##_args); \ 489 SYSUNINIT(name##_mtx_sysuninit, SI_SUB_LOCK, SI_ORDER_MIDDLE, \ 490 _mtx_destroy, __DEVOLATILE(void *, &(mtx)->mtx_lock)) 491 492/* 493 * The INVARIANTS-enabled mtx_assert() functionality. 494 * 495 * The constants need to be defined for INVARIANT_SUPPORT infrastructure 496 * support as _mtx_assert() itself uses them and the latter implies that 497 * _mtx_assert() must build. 498 */ 499#if defined(INVARIANTS) || defined(INVARIANT_SUPPORT) 500#define MA_OWNED LA_XLOCKED 501#define MA_NOTOWNED LA_UNLOCKED 502#define MA_RECURSED LA_RECURSED 503#define MA_NOTRECURSED LA_NOTRECURSED 504#endif 505 506/* 507 * Common lock type names. 508 */ 509#define MTX_NETWORK_LOCK "network driver" 510 511#endif /* _KERNEL */ 512#endif /* _SYS_MUTEX_H_ */ 513