/*
- * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. The rights granted to you under the
- * License may not be used to create, or enable the creation or
- * redistribution of, unlawful or unlicensed copies of an Apple operating
- * system, or to circumvent, violate, or enable the circumvention or
- * violation of, any terms of an Apple operating system software license
- * agreement.
- *
- * Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
* limitations under the License.
- *
- * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* @OSF_COPYRIGHT@
#include <sys/kdebug.h>
+#if CONFIG_DTRACE
+/*
+ * We need only enough declarations from the BSD-side to be able to
+ * test if our probe is active, and to call __dtrace_probe(). Setting
+ * NEED_DTRACE_DEFS gets a local copy of those definitions pulled in.
+ */
+#define NEED_DTRACE_DEFS
+#include <../bsd/sys/lockstat.h>
+#endif
+
#define LCK_MTX_SLEEP_CODE 0
#define LCK_MTX_SLEEP_DEADLINE_CODE 1
#define LCK_MTX_LCK_WAIT_CODE 2
static queue_head_t lck_grp_queue;
static unsigned int lck_grp_cnt;
-decl_mutex_data(static,lck_grp_lock)
+decl_lck_mtx_data(static,lck_grp_lock)
+static lck_mtx_ext_t lck_grp_lock_ext;
lck_grp_attr_t LockDefaultGroupAttr;
-lck_grp_t LockCompatGroup;
-lck_attr_t LockDefaultLckAttr;
+lck_grp_t LockCompatGroup;
+lck_attr_t LockDefaultLckAttr;
/*
* Routine: lck_mod_init
void)
{
queue_init(&lck_grp_queue);
- mutex_init(&lck_grp_lock, 0);
- lck_grp_cnt = 0;
- lck_grp_attr_setdefault( &LockDefaultGroupAttr);
- lck_grp_init( &LockCompatGroup, "Compatibility APIs", LCK_GRP_ATTR_NULL);
+
+ /*
+ * Need to bootstrap the LockCompatGroup instead of calling lck_grp_init() here. This avoids
+ * grabbing the lck_grp_lock before it is initialized.
+ */
+
+ bzero(&LockCompatGroup, sizeof(lck_grp_t));
+ (void) strncpy(LockCompatGroup.lck_grp_name, "Compatibility APIs", LCK_GRP_MAX_NAME);
+
+ if (LcksOpts & enaLkStat)
+ LockCompatGroup.lck_grp_attr = LCK_GRP_ATTR_STAT;
+ else
+ LockCompatGroup.lck_grp_attr = LCK_ATTR_NONE;
+
+ LockCompatGroup.lck_grp_refcnt = 1;
+
+ enqueue_tail(&lck_grp_queue, (queue_entry_t)&LockCompatGroup);
+ lck_grp_cnt = 1;
+
+ lck_grp_attr_setdefault(&LockDefaultGroupAttr);
lck_attr_setdefault(&LockDefaultLckAttr);
+
+ lck_mtx_init_ext(&lck_grp_lock, &lck_grp_lock_ext, &LockCompatGroup, &LockDefaultLckAttr);
+
}
/*
lck_grp_attr_setstat(
lck_grp_attr_t *attr)
{
- (void)hw_atomic_or((uint32_t *)&attr->grp_attr_val, LCK_GRP_ATTR_STAT);
+ (void)hw_atomic_or(&attr->grp_attr_val, LCK_GRP_ATTR_STAT);
}
grp->lck_grp_refcnt = 1;
- mutex_lock(&lck_grp_lock);
+ lck_mtx_lock(&lck_grp_lock);
enqueue_tail(&lck_grp_queue, (queue_entry_t)grp);
lck_grp_cnt++;
- mutex_unlock(&lck_grp_lock);
+ lck_mtx_unlock(&lck_grp_lock);
}
lck_grp_free(
lck_grp_t *grp)
{
- mutex_lock(&lck_grp_lock);
+ lck_mtx_lock(&lck_grp_lock);
lck_grp_cnt--;
(void)remque((queue_entry_t)grp);
- mutex_unlock(&lck_grp_lock);
+ lck_mtx_unlock(&lck_grp_lock);
lck_grp_deallocate(grp);
}
lck_grp_reference(
lck_grp_t *grp)
{
- (void)hw_atomic_add((uint32_t *)(&grp->lck_grp_refcnt), 1);
+ (void)hw_atomic_add(&grp->lck_grp_refcnt, 1);
}
lck_grp_deallocate(
lck_grp_t *grp)
{
- if (hw_atomic_sub((uint32_t *)(&grp->lck_grp_refcnt), 1) == 0)
+ if (hw_atomic_sub(&grp->lck_grp_refcnt, 1) == 0)
kfree(grp, sizeof(lck_grp_t));
}
return panic("lck_grp_lckcnt_incr(): invalid lock type: %d\n", lck_type);
}
- (void)hw_atomic_add((uint32_t *)lckcnt, 1);
+ (void)hw_atomic_add(lckcnt, 1);
}
/*
return panic("lck_grp_lckcnt_decr(): invalid lock type: %d\n", lck_type);
}
- (void)hw_atomic_sub((uint32_t *)lckcnt, 1);
+ (void)hw_atomic_sub(lckcnt, 1);
}
/*
lck_attr_t *attr)
{
#if !DEBUG
- if (LcksOpts & enaLkDeb)
- attr->lck_attr_val = LCK_ATTR_DEBUG;
- else
- attr->lck_attr_val = LCK_ATTR_NONE;
+ if (LcksOpts & enaLkDeb)
+ attr->lck_attr_val = LCK_ATTR_DEBUG;
+ else
+ attr->lck_attr_val = LCK_ATTR_NONE;
#else
- attr->lck_attr_val = LCK_ATTR_DEBUG;
-#endif
-
+ attr->lck_attr_val = LCK_ATTR_DEBUG;
+#endif /* !DEBUG */
}
lck_attr_setdebug(
lck_attr_t *attr)
{
- (void)hw_atomic_or((uint32_t *)&attr->lck_attr_val, LCK_ATTR_DEBUG);
+ (void)hw_atomic_or(&attr->lck_attr_val, LCK_ATTR_DEBUG);
+}
+
+/*
+ * Routine: lck_attr_setdebug
+ */
+void
+lck_attr_cleardebug(
+ lck_attr_t *attr)
+{
+ (void)hw_atomic_and(&attr->lck_attr_val, ~LCK_ATTR_DEBUG);
+}
+
+
+/*
+ * Routine: lck_attr_rw_shared_priority
+ */
+void
+lck_attr_rw_shared_priority(
+ lck_attr_t *attr)
+{
+ (void)hw_atomic_or(&attr->lck_attr_val, LCK_ATTR_RW_SHARED_PRIORITY);
}
if (res == THREAD_WAITING) {
lck_mtx_unlock(lck);
res = thread_block(THREAD_CONTINUE_NULL);
- if (!(lck_sleep_action & LCK_SLEEP_UNLOCK))
- lck_mtx_lock(lck);
+ if (!(lck_sleep_action & LCK_SLEEP_UNLOCK)) {
+ if ((lck_sleep_action & LCK_SLEEP_SPIN))
+ lck_mtx_lock_spin(lck);
+ else
+ lck_mtx_lock(lck);
+ }
}
else
if (lck_sleep_action & LCK_SLEEP_UNLOCK)
lck_mtx_t *mutex;
integer_t priority;
spl_t s = splsched();
+#if CONFIG_DTRACE
+ uint64_t sleep_start = 0;
+
+ if (lockstat_probemap[LS_LCK_MTX_LOCK_BLOCK] || lockstat_probemap[LS_LCK_MTX_EXT_LOCK_BLOCK]) {
+ sleep_start = mach_absolute_time();
+ }
+#endif
if (lck->lck_mtx_tag != LCK_MTX_TAG_INDIRECT)
mutex = lck;
priority = self->sched_pri;
if (priority < self->priority)
priority = self->priority;
- if (priority > MINPRI_KERNEL)
- priority = MINPRI_KERNEL;
- else
if (priority < BASEPRI_DEFAULT)
priority = BASEPRI_DEFAULT;
thread_lock(holder);
if (mutex->lck_mtx_pri == 0)
holder->promotions++;
- if (holder->priority < MINPRI_KERNEL) {
- holder->sched_mode |= TH_MODE_PROMOTED;
- if ( mutex->lck_mtx_pri < priority &&
+ holder->sched_mode |= TH_MODE_PROMOTED;
+ if ( mutex->lck_mtx_pri < priority &&
holder->sched_pri < priority ) {
- KERNEL_DEBUG_CONSTANT(
- MACHDBG_CODE(DBG_MACH_SCHED,MACH_PROMOTE) | DBG_FUNC_NONE,
- holder->sched_pri, priority, (int)holder, (int)lck, 0);
+ KERNEL_DEBUG_CONSTANT(
+ MACHDBG_CODE(DBG_MACH_SCHED,MACH_PROMOTE) | DBG_FUNC_NONE,
+ holder->sched_pri, priority, holder, lck, 0);
- set_sched_pri(holder, priority);
- }
+ set_sched_pri(holder, priority);
}
thread_unlock(holder);
splx(s);
thread_block(THREAD_CONTINUE_NULL);
KERNEL_DEBUG(MACHDBG_CODE(DBG_MACH_LOCKS, LCK_MTX_LCK_WAIT_CODE) | DBG_FUNC_END, 0, 0, 0, 0, 0);
+#if CONFIG_DTRACE
+ /*
+ * Record the Dtrace lockstat probe for blocking, block time
+ * measured from when we were entered.
+ */
+ if (sleep_start) {
+ if (lck->lck_mtx_tag != LCK_MTX_TAG_INDIRECT) {
+ LOCKSTAT_RECORD(LS_LCK_MTX_LOCK_BLOCK, lck,
+ mach_absolute_time() - sleep_start);
+ } else {
+ LOCKSTAT_RECORD(LS_LCK_MTX_EXT_LOCK_BLOCK, lck,
+ mach_absolute_time() - sleep_start);
+ }
+ }
+#endif
}
/*
thread_lock(thread);
thread->promotions++;
- if (thread->priority < MINPRI_KERNEL) {
- thread->sched_mode |= TH_MODE_PROMOTED;
- if (thread->sched_pri < priority) {
- KERNEL_DEBUG_CONSTANT(
- MACHDBG_CODE(DBG_MACH_SCHED,MACH_PROMOTE) | DBG_FUNC_NONE,
- thread->sched_pri, priority, 0, (int)lck, 0);
+ thread->sched_mode |= TH_MODE_PROMOTED;
+ if (thread->sched_pri < priority) {
+ KERNEL_DEBUG_CONSTANT(
+ MACHDBG_CODE(DBG_MACH_SCHED,MACH_PROMOTE) | DBG_FUNC_NONE,
+ thread->sched_pri, priority, 0, lck, 0);
- set_sched_pri(thread, priority);
- }
+ set_sched_pri(thread, priority);
}
thread_unlock(thread);
splx(s);
KERNEL_DEBUG(MACHDBG_CODE(DBG_MACH_LOCKS, LCK_MTX_UNLCK_WAKEUP_CODE) | DBG_FUNC_START, (int)lck, (int)holder, 0, 0, 0);
if (thread != holder)
- panic("lck_mtx_unlock_wakeup: mutex %x holder %x\n", mutex, holder);
+ panic("lck_mtx_unlock_wakeup: mutex %p holder %p\n", mutex, holder);
if (thread->promotions > 0) {
spl_t s = splsched();
if (thread->sched_mode & TH_MODE_ISDEPRESSED) {
KERNEL_DEBUG_CONSTANT(
MACHDBG_CODE(DBG_MACH_SCHED,MACH_DEMOTE) | DBG_FUNC_NONE,
- thread->sched_pri, DEPRESSPRI, 0, (int)lck, 0);
+ thread->sched_pri, DEPRESSPRI, 0, lck, 0);
set_sched_pri(thread, DEPRESSPRI);
}
MACHDBG_CODE(DBG_MACH_SCHED,MACH_DEMOTE) |
DBG_FUNC_NONE,
thread->sched_pri, thread->priority,
- 0, (int)lck, 0);
+ 0, lck, 0);
}
compute_priority(thread, FALSE);
KERNEL_DEBUG(MACHDBG_CODE(DBG_MACH_LOCKS, LCK_MTX_UNLCK_WAKEUP_CODE) | DBG_FUNC_END, 0, 0, 0, 0, 0);
}
+void
+lck_mtx_unlockspin_wakeup (
+ lck_mtx_t *lck)
+{
+ assert(lck->lck_mtx_waiters > 0);
+ thread_wakeup_one((event_t)(((unsigned int*)lck)+(sizeof(lck_mtx_t)-1)/sizeof(unsigned int)));
+
+ KERNEL_DEBUG(MACHDBG_CODE(DBG_MACH_LOCKS, LCK_MTX_UNLCK_WAKEUP_CODE) | DBG_FUNC_NONE, (int)lck, 0, 0, 1, 0);
+#if CONFIG_DTRACE
+ /*
+ * When there are waiters, we skip the hot-patch spot in the
+ * fastpath, so we record it here.
+ */
+ LOCKSTAT_RECORD(LS_LCK_MTX_UNLOCK_RELEASE, lck, 0);
+#endif
+}
+
+
/*
* Routine: mutex_pause
*
* Called by former callers of simple_lock_pause().
*/
+#define MAX_COLLISION_COUNTS 32
+#define MAX_COLLISION 8
+
+unsigned int max_collision_count[MAX_COLLISION_COUNTS];
+
+uint32_t collision_backoffs[MAX_COLLISION] = {
+ 10, 50, 100, 200, 400, 600, 800, 1000
+};
+
void
-mutex_pause(void)
+mutex_pause(uint32_t collisions)
{
wait_result_t wait_result;
+ uint32_t back_off;
- wait_result = assert_wait_timeout((event_t)mutex_pause, THREAD_UNINT, 1, 1000*NSEC_PER_USEC);
+ if (collisions >= MAX_COLLISION_COUNTS)
+ collisions = MAX_COLLISION_COUNTS - 1;
+ max_collision_count[collisions]++;
+
+ if (collisions >= MAX_COLLISION)
+ collisions = MAX_COLLISION - 1;
+ back_off = collision_backoffs[collisions];
+
+ wait_result = assert_wait_timeout((event_t)mutex_pause, THREAD_UNINT, back_off, NSEC_PER_USEC);
assert(wait_result == THREAD_WAITING);
wait_result = thread_block(THREAD_CONTINUE_NULL);
assert(wait_result == THREAD_TIMED_OUT);
}
+
+unsigned int mutex_yield_wait = 0;
+unsigned int mutex_yield_no_wait = 0;
+
+void
+lck_mtx_yield(
+ lck_mtx_t *lck)
+{
+ int waiters;
+
+#if DEBUG
+ lck_mtx_assert(lck, LCK_MTX_ASSERT_OWNED);
+#endif /* DEBUG */
+
+ if (lck->lck_mtx_tag == LCK_MTX_TAG_INDIRECT)
+ waiters = lck->lck_mtx_ptr->lck_mtx.lck_mtx_waiters;
+ else
+ waiters = lck->lck_mtx_waiters;
+
+ if ( !waiters) {
+ mutex_yield_no_wait++;
+ } else {
+ mutex_yield_wait++;
+ lck_mtx_unlock(lck);
+ mutex_pause(0);
+ lck_mtx_lock(lck);
+ }
+}
+
+
/*
* Routine: lck_rw_sleep
*/
if (host == HOST_NULL)
return KERN_INVALID_HOST;
- mutex_lock(&lck_grp_lock);
+ lck_mtx_lock(&lck_grp_lock);
lockgroup_info_size = round_page(lck_grp_cnt * sizeof *lockgroup_info);
kr = kmem_alloc_pageable(ipc_kernel_map,
&lockgroup_info_addr, lockgroup_info_size);
if (kr != KERN_SUCCESS) {
- mutex_unlock(&lck_grp_lock);
+ lck_mtx_unlock(&lck_grp_lock);
return(kr);
}
}
*lockgroup_infoCntp = lck_grp_cnt;
- mutex_unlock(&lck_grp_lock);
+ lck_mtx_unlock(&lck_grp_lock);
used = (*lockgroup_infoCntp) * sizeof *lockgroup_info;
extern wait_result_t thread_sleep_lock_write_EXT(
event_t event, lck_rw_t *lock, wait_interrupt_t interruptible);
-extern lck_mtx_t *mutex_alloc_EXT(unsigned short tag);
-extern void mutex_free_EXT(lck_mtx_t *mutex);
-extern void mutex_init_EXT(lck_mtx_t *mutex, unsigned short tag);
-extern void mutex_lock_EXT(lck_mtx_t *mutex);
-extern boolean_t mutex_try_EXT(lck_mtx_t *mutex);
-extern void mutex_unlock_EXT(lck_mtx_t *mutex);
-extern wait_result_t thread_sleep_mutex_EXT(
- event_t event, lck_mtx_t *mutex, wait_interrupt_t interruptible);
-extern wait_result_t thread_sleep_mutex_deadline_EXT(
- event_t event, lck_mtx_t *mutex, uint64_t deadline, wait_interrupt_t interruptible);
-
extern void usimple_lock_EXT(lck_spin_t *lock);
extern void usimple_lock_init_EXT(lck_spin_t *lock, unsigned short tag);
extern unsigned int usimple_lock_try_EXT(lck_spin_t *lock);
extern void usimple_unlock_EXT(lck_spin_t *lock);
extern wait_result_t thread_sleep_usimple_lock_EXT(event_t event, lck_spin_t *lock, wait_interrupt_t interruptible);
+
+lck_mtx_t* mutex_alloc_EXT(__unused unsigned short tag);
+void mutex_free_EXT(lck_mtx_t *mutex);
+void mutex_init_EXT(lck_mtx_t *mutex, __unused unsigned short tag);
+wait_result_t thread_sleep_mutex_EXT(event_t event, lck_mtx_t *mutex, wait_interrupt_t interruptible);
+wait_result_t thread_sleep_mutex_deadline_EXT(event_t event, lck_mtx_t *mutex, uint64_t deadline, wait_interrupt_t interruptible);
+
lck_rw_t *
lock_alloc_EXT(
__unused boolean_t can_sleep,
return( lck_rw_sleep(lock, LCK_SLEEP_EXCLUSIVE, event, interruptible));
}
-lck_mtx_t *
-mutex_alloc_EXT(
- __unused unsigned short tag)
-{
- return(lck_mtx_alloc_init(&LockCompatGroup, LCK_ATTR_NULL));
-}
-
void
-mutex_free_EXT(
- lck_mtx_t *mutex)
+usimple_lock_EXT(
+ lck_spin_t *lock)
{
- lck_mtx_free(mutex, &LockCompatGroup);
+ lck_spin_lock(lock);
}
void
-mutex_init_EXT(
- lck_mtx_t *mutex,
+usimple_lock_init_EXT(
+ lck_spin_t *lock,
__unused unsigned short tag)
{
- lck_mtx_init(mutex, &LockCompatGroup, LCK_ATTR_NULL);
-}
-
-void
-mutex_lock_EXT(
- lck_mtx_t *mutex)
-{
- lck_mtx_lock(mutex);
+ lck_spin_init(lock, &LockCompatGroup, LCK_ATTR_NULL);
}
-boolean_t
-mutex_try_EXT(
- lck_mtx_t *mutex)
+unsigned int
+usimple_lock_try_EXT(
+ lck_spin_t *lock)
{
- return(lck_mtx_try_lock(mutex));
+ return(lck_spin_try_lock(lock));
}
void
-mutex_unlock_EXT(
- lck_mtx_t *mutex)
+usimple_unlock_EXT(
+ lck_spin_t *lock)
{
- lck_mtx_unlock(mutex);
+ lck_spin_unlock(lock);
}
wait_result_t
-thread_sleep_mutex_EXT(
+thread_sleep_usimple_lock_EXT(
event_t event,
- lck_mtx_t *mutex,
- wait_interrupt_t interruptible)
+ lck_spin_t *lock,
+ wait_interrupt_t interruptible)
{
- return( lck_mtx_sleep(mutex, LCK_SLEEP_DEFAULT, event, interruptible));
+ return( lck_spin_sleep(lock, LCK_SLEEP_DEFAULT, event, interruptible));
}
-
-wait_result_t
-thread_sleep_mutex_deadline_EXT(
- event_t event,
- lck_mtx_t *mutex,
- uint64_t deadline,
- wait_interrupt_t interruptible)
+lck_mtx_t *
+mutex_alloc_EXT(
+ __unused unsigned short tag)
{
- return( lck_mtx_sleep_deadline(mutex, LCK_SLEEP_DEFAULT, event, interruptible, deadline));
+ return(lck_mtx_alloc_init(&LockCompatGroup, LCK_ATTR_NULL));
}
void
-usimple_lock_EXT(
- lck_spin_t *lock)
+mutex_free_EXT(
+ lck_mtx_t *mutex)
{
- lck_spin_lock(lock);
+ lck_mtx_free(mutex, &LockCompatGroup);
}
void
-usimple_lock_init_EXT(
- lck_spin_t *lock,
- __unused unsigned short tag)
-{
- lck_spin_init(lock, &LockCompatGroup, LCK_ATTR_NULL);
-}
-
-unsigned int
-usimple_lock_try_EXT(
- lck_spin_t *lock)
+mutex_init_EXT(
+ lck_mtx_t *mutex,
+ __unused unsigned short tag)
{
- lck_spin_try_lock(lock);
+ lck_mtx_init(mutex, &LockCompatGroup, LCK_ATTR_NULL);
}
-void
-usimple_unlock_EXT(
- lck_spin_t *lock)
+wait_result_t
+thread_sleep_mutex_EXT(
+ event_t event,
+ lck_mtx_t *mutex,
+ wait_interrupt_t interruptible)
{
- lck_spin_unlock(lock);
+ return( lck_mtx_sleep(mutex, LCK_SLEEP_DEFAULT, event, interruptible));
}
wait_result_t
-thread_sleep_usimple_lock_EXT(
- event_t event,
- lck_spin_t *lock,
- wait_interrupt_t interruptible)
+thread_sleep_mutex_deadline_EXT(
+ event_t event,
+ lck_mtx_t *mutex,
+ uint64_t deadline,
+ wait_interrupt_t interruptible)
{
- return( lck_spin_sleep(lock, LCK_SLEEP_DEFAULT, event, interruptible));
+ return( lck_mtx_sleep_deadline(mutex, LCK_SLEEP_DEFAULT, event, interruptible, deadline));
}
projects / apple / xnu.git / blobdiff