| /Linux-v5.15/kernel/sched/ |
| D | completion.c | 1 // SPDX-License-Identifier: GPL-2.0
3 * Generic wait-for-completion handler;
6 * wait_for_completion default blocks whereas semaphore default non-block. The
17 * complete: - signals a single thread waiting on this completion
18 * @x: holds the state of this particular completion
26 * accessing the task state.
32 raw_spin_lock_irqsave(&x->wait.lock, flags); in complete()
34 if (x->done != UINT_MAX) in complete()
35 x->done++; in complete()
36 swake_up_locked(&x->wait); in complete()
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| D | swait.c | 1 // SPDX-License-Identifier: GPL-2.0
3 * <linux/swait.h> (simple wait queues ) implementation:
10 raw_spin_lock_init(&q->lock); in __init_swait_queue_head()
11 lockdep_set_class_and_name(&q->lock, key, name); in __init_swait_queue_head()
12 INIT_LIST_HEAD(&q->task_list); in __init_swait_queue_head()
26 if (list_empty(&q->task_list)) in swake_up_locked()
29 curr = list_first_entry(&q->task_list, typeof(*curr), task_list); in swake_up_locked()
30 wake_up_process(curr->task); in swake_up_locked()
31 list_del_init(&curr->task_list); in swake_up_locked()
44 while (!list_empty(&q->task_list)) in swake_up_all_locked()
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| D | wait.c | 1 // SPDX-License-Identifier: GPL-2.0-only
11 spin_lock_init(&wq_head->lock); in __init_waitqueue_head()
12 lockdep_set_class_and_name(&wq_head->lock, key, name); in __init_waitqueue_head()
13 INIT_LIST_HEAD(&wq_head->head); in __init_waitqueue_head()
22 wq_entry->flags &= ~WQ_FLAG_EXCLUSIVE; in add_wait_queue()
23 spin_lock_irqsave(&wq_head->lock, flags); in add_wait_queue()
25 spin_unlock_irqrestore(&wq_head->lock, flags); in add_wait_queue()
33 wq_entry->flags |= WQ_FLAG_EXCLUSIVE; in add_wait_queue_exclusive()
34 spin_lock_irqsave(&wq_head->lock, flags); in add_wait_queue_exclusive()
36 spin_unlock_irqrestore(&wq_head->lock, flags); in add_wait_queue_exclusive()
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| /Linux-v5.15/include/soc/qcom/ |
| D | tcs.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (c) 2016-2019, The Linux Foundation. All rights reserved.
12 * rpmh_state: state for the request
14 * RPMH_SLEEP_STATE: State of the resource when the processor subsystem
17 * RPMH_WAKE_ONLY_STATE: Resume resource state to the value previously
19 * RPMH_ACTIVE_ONLY_STATE: Active or AMC mode requests. Resource state
32 * @data: the resource state request
33 * @wait: ensure that this command is complete before returning.
34 * Setting "wait" here only makes sense during rpmh_write_batch() for
35 * active-only transfers, this is because:
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| /Linux-v5.15/drivers/mtd/chips/ |
| D | cfi_cmdset_0020.c | 8 * - completely revamped method functions so they are aware and
10 * - scalability vs code size is completely set at compile-time
12 * - optimized write buffer method
13 * 06/21/2002 Joern Engel <joern@wh.fh-wedel.de> and others
14 * - modified Intel Command Set 0x0001 to support ST Advanced Architecture
16 * - added a writev function
17 * 07/13/2005 Joern Engel <joern@wh.fh-wedel.de>
18 * - Plugged memory leak in cfi_staa_writev().
68 printk(" Feature/Command Support: %4.4X\n", extp->FeatureSupport); in cfi_tell_features()
69 printk(" - Chip Erase: %s\n", extp->FeatureSupport&1?"supported":"unsupported"); in cfi_tell_features()
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| /Linux-v5.15/include/linux/ |
| D | swait.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
8 #include <linux/wait.h>
12 * Simple waitqueues are semantically very different to regular wait queues
13 * (wait.h). The most important difference is that the simple waitqueue allows
14 * for deterministic behaviour -- IOW it has strictly bounded IRQ and lock hold
24 * - mixing INTERRUPTIBLE and UNINTERRUPTIBLE sleeps on the same waitqueue;
26 * sleeper state.
28 * - the !exclusive mode; because that leads to O(n) wakeups, everything is
31 * - custom wake callback functions; because you cannot give any guarantees
35 * As a side effect of these; the data structures are slimmer albeit more ad-hoc.
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| D | wait_bit.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
6 * Linux wait-bit related types and methods:
8 #include <linux/wait.h>
55 * wait_on_bit - wait for a bit to be cleared
58 * @mode: the task state to sleep in
66 * Returned value will be zero if the bit was cleared, or non-zero
82 * wait_on_bit_io - wait for a bit to be cleared
85 * @mode: the task state to sleep in
87 * Use the standard hashed waitqueue table to wait for a bit
91 * Returned value will be zero if the bit was cleared, or non-zero
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| D | wait.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
5 * Linux wait queue related types and methods
12 #include <uapi/linux/wait.h>
28 * A single wait-queue entry structure:
84 wq_entry->flags = 0; in init_waitqueue_entry()
85 wq_entry->private = p; in init_waitqueue_entry()
86 wq_entry->func = default_wake_function; in init_waitqueue_entry()
92 wq_entry->flags = 0; in init_waitqueue_func_entry()
93 wq_entry->private = NULL; in init_waitqueue_func_entry()
94 wq_entry->func = func; in init_waitqueue_func_entry()
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| /Linux-v5.15/drivers/scsi/isci/ |
| D | phy.h | 7 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
20 * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
26 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
63 /* This is the timeout value for the SATA phy to wait for a SIGNATURE FIS
64 * before restarting the starting state machine. Technically, the old parallel
74 * notification from the hardware that we restart the hardware OOB state
80 * isci_phy - hba local phy infrastructure
83 * @phy_index: physical index relative to the controller (0-3)
162 * struct sci_phy_properties - This structure defines the properties common to
189 * struct sci_sas_phy_properties - This structure defines the properties,
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| /Linux-v5.15/drivers/net/ethernet/sfc/falcon/ |
| D | selftest.c | 1 // SPDX-License-Identifier: GPL-2.0-only
4 * Copyright 2005-2006 Fen Systems Ltd.
5 * Copyright 2006-2012 Solarflare Communications Inc.
26 * - All IRQs may be disabled on a CPU for a *long* time by e.g. a
28 * - The PREEMPT_RT patches mostly deal with this, but also allow a
38 * The self-test should stress every RSS vector, and unfortunately
60 [EF4_INT_MODE_MSIX] = "MSI-X",
65 STRING_TABLE_LOOKUP(efx->interrupt_mode, ef4_interrupt_mode)
68 * struct ef4_loopback_state - persistent state during a loopback selftest
87 /* How long to wait for all the packets to arrive (in ms) */
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| /Linux-v5.15/drivers/net/ethernet/sfc/ |
| D | selftest.c | 1 // SPDX-License-Identifier: GPL-2.0-only
4 * Copyright 2005-2006 Fen Systems Ltd.
5 * Copyright 2006-2012 Solarflare Communications Inc.
29 * - All IRQs may be disabled on a CPU for a *long* time by e.g. a
31 * - The PREEMPT_RT patches mostly deal with this, but also allow a
41 * The self-test should stress every RSS vector, and unfortunately
63 [EFX_INT_MODE_MSIX] = "MSI-X",
68 STRING_TABLE_LOOKUP(efx->interrupt_mode, efx_interrupt_mode)
71 * struct efx_loopback_state - persistent state during a loopback selftest
90 /* How long to wait for all the packets to arrive (in ms) */
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| /Linux-v5.15/drivers/infiniband/hw/hfi1/ |
| D | vnic_sdma.c | 1 // SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause
3 * Copyright(c) 2017 - 2018 Intel Corporation.
20 * struct vnic_txreq - VNIC transmit descriptor
42 struct hfi1_vnic_sdma *vnic_sdma = tx->sdma; in vnic_sdma_complete()
44 sdma_txclean(vnic_sdma->dd, txreq); in vnic_sdma_complete()
45 dev_kfree_skb_any(tx->skb); in vnic_sdma_complete()
46 kmem_cache_free(vnic_sdma->dd->vnic.txreq_cache, tx); in vnic_sdma_complete()
55 sde->dd, in build_vnic_ulp_payload()
56 &tx->txreq, in build_vnic_ulp_payload()
57 tx->skb->data, in build_vnic_ulp_payload()
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| /Linux-v5.15/arch/powerpc/platforms/powernv/ |
| D | opal-async.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
5 * Copyright 2013-2017 IBM Corp.
16 #include <linux/wait.h>
31 enum opal_async_token_state state; member
44 int i, token = -EBUSY; in __opal_async_get_token()
49 if (opal_async_tokens[i].state == ASYNC_TOKEN_UNALLOCATED) { in __opal_async_get_token()
50 opal_async_tokens[i].state = ASYNC_TOKEN_ALLOCATED; in __opal_async_get_token()
70 /* Wait until a token is available */ in opal_async_get_token_interruptible()
72 return -ERESTARTSYS; in opal_async_get_token_interruptible()
90 return -EINVAL; in __opal_async_release_token()
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| /Linux-v5.15/drivers/net/wwan/iosm/ |
| D | iosm_ipc_pm.h | 1 /* SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2020-21 Intel Corporation.
18 * union ipc_pm_cond - Conditions for D3 and the sleep message to CP.
22 * @link: Device link state.
35 * enum ipc_mem_host_pm_state - Possible states of the HOST SLEEP finite state
38 * @IPC_MEM_HOST_PM_ACTIVE_WAIT: Intermediate state before going to
40 * @IPC_MEM_HOST_PM_SLEEP_WAIT_IDLE: Intermediate state to wait for idle
42 * @IPC_MEM_HOST_PM_SLEEP_WAIT_D3: Intermediate state to wait for D3
44 * @IPC_MEM_HOST_PM_SLEEP: after this state the interface is not
46 * @IPC_MEM_HOST_PM_SLEEP_WAIT_EXIT_SLEEP: Intermediate state before exiting
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| /Linux-v5.15/kernel/locking/ |
| D | qspinlock_paravirt.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
16 * pv_wait(u8 *ptr, u8 val) -- suspends the vcpu if *ptr == val
17 * pv_kick(cpu) -- wakes a suspended vcpu
31 * mitigates the slight slowdown for non-overcommitted guest with this
32 * aggressive wait-early mechanism.
53 u8 state; member
63 * The pending bit is set by the queue head vCPU of the MCS wait queue in
67 * enter the MCS wait queue. So lock starvation shouldn't happen as long
72 * mode spinning on the lock unless the MCS wait queue is empty. In this
85 * present in the MCS wait queue but the pending bit isn't set. in pv_hybrid_queued_unfair_trylock()
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| /Linux-v5.15/Documentation/devicetree/bindings/arm/msm/ |
| D | qcom,idle-state.txt | 3 ARM provides idle-state node to define the cpuidle states, as defined in [1].
4 cpuidle-qcom is the cpuidle driver for Qualcomm SoCs and uses these idle
6 The idle states supported by the QCOM SoC are defined as -
16 trigger to execute the SPM state machine. The SPM state machine waits for the
19 the SPM state machine out of its wait, the next step is to ensure that the
21 execution. This state is defined as a generic ARM WFI state by the ARM cpuidle
22 driver and is not defined in the DT. The SPM state machine should be
23 configured to execute this state by default and after executing every other
24 state below.
26 Retention: Retention is a low power state where the core is clock gated and
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| /Linux-v5.15/drivers/gpu/drm/rcar-du/ |
| D | rcar_du_crtc.h | 1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * rcar_du_crtc.h -- R-Car Display Unit CRTCs
5 * Copyright (C) 2013-2015 Renesas Electronics Corporation
15 #include <linux/wait.h>
26 * struct rcar_du_crtc - the CRTC, representing a DU superposition processor
37 * @flip_wait: wait queue used to signal page flip completion
39 * @vblank_wait: wait queue used to signal vertical blanking
40 * @vblank_count: number of vertical blanking interrupts to wait for
82 * struct rcar_du_crtc_state - Driver-specific CRTC state
83 * @state: base DRM CRTC state
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| /Linux-v5.15/drivers/staging/media/omap4iss/ |
| D | iss_ipipe.h | 1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * TI OMAP4 ISS V4L2 Driver - ISP IPIPE module
28 * struct iss_ipipe_device - Structure for the IPIPE module to store its own
36 * @state: Streaming state
37 * @wait: Wait queue used to stop the module
38 * @stopping: Stopping state
49 enum iss_pipeline_stream_state state; member
50 wait_queue_head_t wait; member
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| D | iss_resizer.h | 1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * TI OMAP4 ISS V4L2 Driver - ISP RESIZER module
29 * struct iss_resizer_device - Structure for the RESIZER module to store its own
38 * @state: Streaming state
39 * @wait: Wait queue used to stop the module
40 * @stopping: Stopping state
52 enum iss_pipeline_stream_state state; member
53 wait_queue_head_t wait; member
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| /Linux-v5.15/fs/fscache/ |
| D | object.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* FS-Cache object state machine handler
8 * object state machine and the in-kernel representations.
32 #define STATE(n) (&__STATE_NAME(n)) macro
35 * Define a work state. Work states are execution states. No event processing
36 * is performed by them. The function attached to a work state returns a
37 * pointer indicating the next state to which the state machine should
38 * transition. Returning NO_TRANSIT repeats the current state, but goes back
51 #define transit_to(state) ({ prefetch(&STATE(state)->work); STATE(state); }) argument
56 * Define a wait state. Wait states are event processing states. No execution
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| /Linux-v5.15/drivers/char/ipmi/ |
| D | ipmi_kcs_sm.c | 1 // SPDX-License-Identifier: GPL-2.0+
5 * State machine for handling IPMI KCS interfaces.
15 * This state machine is taken from the state machine in the IPMI spec,
30 /* kcs_debug is a bit-field
31 * KCS_DEBUG_ENABLE - turned on for now
32 * KCS_DEBUG_MSG - commands and their responses
33 * KCS_DEBUG_STATES - state machine
51 * was added to the state machine in the spec to wait for the
72 * State to transition to the error handler, this was added to
73 * the state machine in the spec to be sure IBF was there.
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| /Linux-v5.15/net/atm/ |
| D | svc.c | 1 // SPDX-License-Identifier: GPL-2.0
2 /* net/atm/svc.c - ATM SVC sockets */
4 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
13 #include <linux/wait.h>
48 DEFINE_WAIT(wait); in svc_disconnect()
53 if (test_bit(ATM_VF_REGIS, &vcc->flags)) { in svc_disconnect()
56 prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE); in svc_disconnect()
57 if (test_bit(ATM_VF_RELEASED, &vcc->flags) || !sigd) in svc_disconnect()
61 finish_wait(sk_sleep(sk), &wait); in svc_disconnect()
63 /* beware - socket is still in use by atmsigd until the last in svc_disconnect()
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| /Linux-v5.15/kernel/rcu/ |
| D | tasks.h | 1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * Task-based RCU implementations.
23 * struct rcu_tasks - Definition for a Tasks-RCU-like mechanism.
26 * @cbs_wq: Wait queue allowing new callback to get kthread's attention.
28 * @kthread_ptr: This flavor's grace-period/callback-invocation kthread.
29 * @gp_func: This flavor's grace-period-wait function.
30 * @gp_state: Grace period's most recent state transition (debugging).
31 * @gp_sleep: Per-grace-period sleep to prevent CPU-bound looping.
34 * @gp_start: Most recent grace-period start in jiffies.
37 * @n_ipis_fails: Number of IPI-send failures.
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| /Linux-v5.15/drivers/cpuidle/ |
| D | coupled.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * coupled.c - helper functions to enter the same idle state on multiple cpus
27 * will corrupt the gic state unless the other cpu runs a work
28 * around). Each cpu has a power state that it can enter without
29 * coordinating with the other cpu (usually Wait For Interrupt, or
32 * sometimes the whole SoC). Entering a coupled power state must
35 * This file implements a solution, where each cpu will wait in the
36 * WFI state until all cpus are ready to enter a coupled state, at
37 * which point the coupled state function will be called on all
44 * power state enter function at the same time. During this pass,
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| /Linux-v5.15/drivers/gpu/drm/amd/display/dc/dce/ |
| D | dmub_psr.c | 37 * Convert dmcub psr state to dmcu psr state.
41 enum dc_psr_state state = PSR_STATE0; in convert_psr_state() local
44 state = PSR_STATE0; in convert_psr_state()
46 state = PSR_STATE1; in convert_psr_state()
48 state = PSR_STATE1a; in convert_psr_state()
50 state = PSR_STATE2; in convert_psr_state()
52 state = PSR_STATE2a; in convert_psr_state()
54 state = PSR_STATE3; in convert_psr_state()
56 state = PSR_STATE3Init; in convert_psr_state()
58 state = PSR_STATE4; in convert_psr_state()
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