mutex.h revision 315341
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 315341 2017-03-16 01:32:56Z 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 tid, int opts, 102 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 tid, int opts, 107 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, t, o, f, l) \ 144 __mtx_lock_sleep(&(m)->mtx_lock, 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, t, o, f, l) \ 149 _mtx_lock_spin_cookie(&(m)->mtx_lock, 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/* Try to release mtx_lock if it is unrecursed and uncontested. */ 175#define _mtx_release_lock(mp, tid) \ 176 atomic_cmpset_rel_ptr(&(mp)->mtx_lock, (tid), MTX_UNOWNED) 177 178/* Release mtx_lock quickly, assuming we own it. */ 179#define _mtx_release_lock_quick(mp) \ 180 atomic_store_rel_ptr(&(mp)->mtx_lock, MTX_UNOWNED) 181 182/* 183 * Full lock operations that are suitable to be inlined in non-debug 184 * kernels. If the lock cannot be acquired or released trivially then 185 * the work is deferred to another function. 186 */ 187 188/* Lock a normal mutex. */ 189#define __mtx_lock(mp, tid, opts, file, line) do { \ 190 uintptr_t _tid = (uintptr_t)(tid); \ 191 \ 192 if (((mp)->mtx_lock != MTX_UNOWNED || !_mtx_obtain_lock((mp), _tid)))\ 193 _mtx_lock_sleep((mp), _tid, (opts), (file), (line)); \ 194 else \ 195 LOCKSTAT_PROFILE_OBTAIN_LOCK_SUCCESS(adaptive__acquire, \ 196 mp, 0, 0, file, line); \ 197} while (0) 198 199/* 200 * Lock a spin mutex. For spinlocks, we handle recursion inline (it 201 * turns out that function calls can be significantly expensive on 202 * some architectures). Since spin locks are not _too_ common, 203 * inlining this code is not too big a deal. 204 */ 205#ifdef SMP 206#define __mtx_lock_spin(mp, tid, opts, file, line) do { \ 207 uintptr_t _tid = (uintptr_t)(tid); \ 208 \ 209 spinlock_enter(); \ 210 if (((mp)->mtx_lock != MTX_UNOWNED || !_mtx_obtain_lock((mp), _tid))) {\ 211 if ((mp)->mtx_lock == _tid) \ 212 (mp)->mtx_recurse++; \ 213 else \ 214 _mtx_lock_spin((mp), _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 ((mp)->mtx_recurse == 0) \ 267 LOCKSTAT_PROFILE_RELEASE_LOCK(adaptive__release, mp); \ 268 if ((mp)->mtx_lock != _tid || !_mtx_release_lock((mp), _tid)) \ 269 _mtx_unlock_sleep((mp), (opts), (file), (line)); \ 270} while (0) 271 272/* 273 * Unlock a spin mutex. For spinlocks, we can handle everything 274 * inline, as it's pretty simple and a function call would be too 275 * expensive (at least on some architectures). Since spin locks are 276 * not _too_ common, inlining this code is not too big a deal. 277 * 278 * Since we always perform a spinlock_enter() when attempting to acquire a 279 * spin lock, we need to always perform a matching spinlock_exit() when 280 * releasing a spin lock. This includes the recursion cases. 281 */ 282#ifdef SMP 283#define __mtx_unlock_spin(mp) do { \ 284 if (mtx_recursed((mp))) \ 285 (mp)->mtx_recurse--; \ 286 else { \ 287 LOCKSTAT_PROFILE_RELEASE_LOCK(spin__release, mp); \ 288 _mtx_release_lock_quick((mp)); \ 289 } \ 290 spinlock_exit(); \ 291} while (0) 292#else /* SMP */ 293#define __mtx_unlock_spin(mp) do { \ 294 if (mtx_recursed((mp))) \ 295 (mp)->mtx_recurse--; \ 296 else { \ 297 LOCKSTAT_PROFILE_RELEASE_LOCK(spin__release, mp); \ 298 (mp)->mtx_lock = MTX_UNOWNED; \ 299 } \ 300 spinlock_exit(); \ 301} while (0) 302#endif /* SMP */ 303 304/* 305 * Exported lock manipulation interface. 306 * 307 * mtx_lock(m) locks MTX_DEF mutex `m' 308 * 309 * mtx_lock_spin(m) locks MTX_SPIN mutex `m' 310 * 311 * mtx_unlock(m) unlocks MTX_DEF mutex `m' 312 * 313 * mtx_unlock_spin(m) unlocks MTX_SPIN mutex `m' 314 * 315 * mtx_lock_spin_flags(m, opts) and mtx_lock_flags(m, opts) locks mutex `m' 316 * and passes option flags `opts' to the "hard" function, if required. 317 * With these routines, it is possible to pass flags such as MTX_QUIET 318 * to the appropriate lock manipulation routines. 319 * 320 * mtx_trylock(m) attempts to acquire MTX_DEF mutex `m' but doesn't sleep if 321 * it cannot. Rather, it returns 0 on failure and non-zero on success. 322 * It does NOT handle recursion as we assume that if a caller is properly 323 * using this part of the interface, he will know that the lock in question 324 * is _not_ recursed. 325 * 326 * mtx_trylock_flags(m, opts) is used the same way as mtx_trylock() but accepts 327 * relevant option flags `opts.' 328 * 329 * mtx_trylock_spin(m) attempts to acquire MTX_SPIN mutex `m' but doesn't 330 * spin if it cannot. Rather, it returns 0 on failure and non-zero on 331 * success. It always returns failure for recursed lock attempts. 332 * 333 * mtx_initialized(m) returns non-zero if the lock `m' has been initialized. 334 * 335 * mtx_owned(m) returns non-zero if the current thread owns the lock `m' 336 * 337 * mtx_recursed(m) returns non-zero if the lock `m' is presently recursed. 338 */ 339#define mtx_lock(m) mtx_lock_flags((m), 0) 340#define mtx_lock_spin(m) mtx_lock_spin_flags((m), 0) 341#define mtx_trylock(m) mtx_trylock_flags((m), 0) 342#define mtx_trylock_spin(m) mtx_trylock_spin_flags((m), 0) 343#define mtx_unlock(m) mtx_unlock_flags((m), 0) 344#define mtx_unlock_spin(m) mtx_unlock_spin_flags((m), 0) 345 346struct mtx_pool; 347 348struct mtx_pool *mtx_pool_create(const char *mtx_name, int pool_size, int opts); 349void mtx_pool_destroy(struct mtx_pool **poolp); 350struct mtx *mtx_pool_find(struct mtx_pool *pool, void *ptr); 351struct mtx *mtx_pool_alloc(struct mtx_pool *pool); 352#define mtx_pool_lock(pool, ptr) \ 353 mtx_lock(mtx_pool_find((pool), (ptr))) 354#define mtx_pool_lock_spin(pool, ptr) \ 355 mtx_lock_spin(mtx_pool_find((pool), (ptr))) 356#define mtx_pool_unlock(pool, ptr) \ 357 mtx_unlock(mtx_pool_find((pool), (ptr))) 358#define mtx_pool_unlock_spin(pool, ptr) \ 359 mtx_unlock_spin(mtx_pool_find((pool), (ptr))) 360 361/* 362 * mtxpool_sleep is a general purpose pool of sleep mutexes. 363 */ 364extern struct mtx_pool *mtxpool_sleep; 365 366#ifndef LOCK_DEBUG 367#error LOCK_DEBUG not defined, include <sys/lock.h> before <sys/mutex.h> 368#endif 369#if LOCK_DEBUG > 0 || defined(MUTEX_NOINLINE) 370#define mtx_lock_flags_(m, opts, file, line) \ 371 _mtx_lock_flags((m), (opts), (file), (line)) 372#define mtx_unlock_flags_(m, opts, file, line) \ 373 _mtx_unlock_flags((m), (opts), (file), (line)) 374#define mtx_lock_spin_flags_(m, opts, file, line) \ 375 _mtx_lock_spin_flags((m), (opts), (file), (line)) 376#define mtx_trylock_spin_flags_(m, opts, file, line) \ 377 _mtx_trylock_spin_flags((m), (opts), (file), (line)) 378#define mtx_unlock_spin_flags_(m, opts, file, line) \ 379 _mtx_unlock_spin_flags((m), (opts), (file), (line)) 380#else /* LOCK_DEBUG == 0 && !MUTEX_NOINLINE */ 381#define mtx_lock_flags_(m, opts, file, line) \ 382 __mtx_lock((m), curthread, (opts), (file), (line)) 383#define mtx_unlock_flags_(m, opts, file, line) \ 384 __mtx_unlock((m), curthread, (opts), (file), (line)) 385#define mtx_lock_spin_flags_(m, opts, file, line) \ 386 __mtx_lock_spin((m), curthread, (opts), (file), (line)) 387#define mtx_trylock_spin_flags_(m, opts, file, line) \ 388 __mtx_trylock_spin((m), curthread, (opts), (file), (line)) 389#define mtx_unlock_spin_flags_(m, opts, file, line) \ 390 __mtx_unlock_spin((m)) 391#endif /* LOCK_DEBUG > 0 || MUTEX_NOINLINE */ 392 393#ifdef INVARIANTS 394#define mtx_assert_(m, what, file, line) \ 395 _mtx_assert((m), (what), (file), (line)) 396 397#define GIANT_REQUIRED mtx_assert_(&Giant, MA_OWNED, __FILE__, __LINE__) 398 399#else /* INVARIANTS */ 400#define mtx_assert_(m, what, file, line) (void)0 401#define GIANT_REQUIRED 402#endif /* INVARIANTS */ 403 404#define mtx_lock_flags(m, opts) \ 405 mtx_lock_flags_((m), (opts), LOCK_FILE, LOCK_LINE) 406#define mtx_unlock_flags(m, opts) \ 407 mtx_unlock_flags_((m), (opts), LOCK_FILE, LOCK_LINE) 408#define mtx_lock_spin_flags(m, opts) \ 409 mtx_lock_spin_flags_((m), (opts), LOCK_FILE, LOCK_LINE) 410#define mtx_unlock_spin_flags(m, opts) \ 411 mtx_unlock_spin_flags_((m), (opts), LOCK_FILE, LOCK_LINE) 412#define mtx_trylock_flags(m, opts) \ 413 mtx_trylock_flags_((m), (opts), LOCK_FILE, LOCK_LINE) 414#define mtx_trylock_spin_flags(m, opts) \ 415 mtx_trylock_spin_flags_((m), (opts), LOCK_FILE, LOCK_LINE) 416#define mtx_assert(m, what) \ 417 mtx_assert_((m), (what), __FILE__, __LINE__) 418 419#define mtx_sleep(chan, mtx, pri, wmesg, timo) \ 420 _sleep((chan), &(mtx)->lock_object, (pri), (wmesg), \ 421 tick_sbt * (timo), 0, C_HARDCLOCK) 422 423#define MTX_READ_VALUE(m) ((m)->mtx_lock) 424 425#define mtx_initialized(m) lock_initialized(&(m)->lock_object) 426 427#define lv_mtx_owner(v) ((struct thread *)((v) & ~MTX_FLAGMASK)) 428 429#define mtx_owner(m) lv_mtx_owner(MTX_READ_VALUE(m)) 430 431#define mtx_owned(m) (mtx_owner(m) == curthread) 432 433#define mtx_recursed(m) ((m)->mtx_recurse != 0) 434 435#define mtx_name(m) ((m)->lock_object.lo_name) 436 437/* 438 * Global locks. 439 */ 440extern struct mtx Giant; 441extern struct mtx blocked_lock; 442 443/* 444 * Giant lock manipulation and clean exit macros. 445 * Used to replace return with an exit Giant and return. 446 * 447 * Note that DROP_GIANT*() needs to be paired with PICKUP_GIANT() 448 * The #ifndef is to allow lint-like tools to redefine DROP_GIANT. 449 */ 450#ifndef DROP_GIANT 451#define DROP_GIANT() \ 452do { \ 453 int _giantcnt = 0; \ 454 WITNESS_SAVE_DECL(Giant); \ 455 \ 456 if (mtx_owned(&Giant)) { \ 457 WITNESS_SAVE(&Giant.lock_object, Giant); \ 458 for (_giantcnt = 0; mtx_owned(&Giant) && \ 459 !SCHEDULER_STOPPED(); _giantcnt++) \ 460 mtx_unlock(&Giant); \ 461 } 462 463#define PICKUP_GIANT() \ 464 PARTIAL_PICKUP_GIANT(); \ 465} while (0) 466 467#define PARTIAL_PICKUP_GIANT() \ 468 mtx_assert(&Giant, MA_NOTOWNED); \ 469 if (_giantcnt > 0) { \ 470 while (_giantcnt--) \ 471 mtx_lock(&Giant); \ 472 WITNESS_RESTORE(&Giant.lock_object, Giant); \ 473 } 474#endif 475 476struct mtx_args { 477 void *ma_mtx; 478 const char *ma_desc; 479 int ma_opts; 480}; 481 482#define MTX_SYSINIT(name, mtx, desc, opts) \ 483 static struct mtx_args name##_args = { \ 484 (mtx), \ 485 (desc), \ 486 (opts) \ 487 }; \ 488 SYSINIT(name##_mtx_sysinit, SI_SUB_LOCK, SI_ORDER_MIDDLE, \ 489 mtx_sysinit, &name##_args); \ 490 SYSUNINIT(name##_mtx_sysuninit, SI_SUB_LOCK, SI_ORDER_MIDDLE, \ 491 _mtx_destroy, __DEVOLATILE(void *, &(mtx)->mtx_lock)) 492 493/* 494 * The INVARIANTS-enabled mtx_assert() functionality. 495 * 496 * The constants need to be defined for INVARIANT_SUPPORT infrastructure 497 * support as _mtx_assert() itself uses them and the latter implies that 498 * _mtx_assert() must build. 499 */ 500#if defined(INVARIANTS) || defined(INVARIANT_SUPPORT) 501#define MA_OWNED LA_XLOCKED 502#define MA_NOTOWNED LA_UNLOCKED 503#define MA_RECURSED LA_RECURSED 504#define MA_NOTRECURSED LA_NOTRECURSED 505#endif 506 507/* 508 * Common lock type names. 509 */ 510#define MTX_NETWORK_LOCK "network driver" 511 512#endif /* _KERNEL */ 513#endif /* _SYS_MUTEX_H_ */ 514