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/linux/fs/gfs2/
H A Dlock_dlm.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
4 * Copyright 2004-2011 Red Hat, Inc.
26 * gfs2_update_stats - Update time based stats
52 s64 delta = sample - s->stats[index]; in gfs2_update_stats()
53 s->stats[index] += (delta >> 3); in gfs2_update_stats()
55 s->stats[index] += (s64)(abs(delta) - s->stats[index]) >> 2; in gfs2_update_stats()
59 * gfs2_update_reply_times - Update locking statistics
63 * This assumes that gl->gl_dstamp has been set earlier.
73 * TRY_1CB flags are set are classified as non-blocking. All
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/linux/Documentation/virt/kvm/x86/
H A Dmmu.rst1 .. SPDX-License-Identifier: GPL-2.0
13 - correctness:
18 - security:
21 - performance:
23 - scaling:
25 - hardware:
27 - integration:
31 - dirty tracking:
33 and framebuffer-based displays
34 - footprint:
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/linux/Documentation/mm/
H A Dmultigen_lru.rst1 .. SPDX-License-Identifier: GPL-2.0
4 Multi-Gen LRU
6 The multi-gen LRU is an alternative LRU implementation that optimizes
14 ----------
20 * Simple self-correcting heuristics
23 implementations. In the multi-gen LRU, each generation represents a
25 (time-based) common frame of reference and therefore help make better
41 choices; thus self-correction is necessary.
43 The benefits of simple self-correcting heuristics are self-evident.
45 attainable. Specifically, pages in the same generation can be
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/linux/drivers/pinctrl/meson/
H A Dpinctrl-meson8-pmx.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * First generation of pinmux driver for Amlogic Meson SoCs
9 /* For this first generation of pinctrl driver every pinmux group can be
10 * enabled by a specific bit in the first register range. When all groups for
18 #include "pinctrl-meson.h"
19 #include "pinctrl-meson8-pmx.h"
22 * meson8_pmx_disable_other_groups() - disable other groups using a given pin
26 * @sel_group: index of the selected group, or -1 if none
29 * selected one. If @sel_group is -1 all groups are disabled, leaving
39 for (i = 0; i < pc->data->num_groups; i++) { in meson8_pmx_disable_other_groups()
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H A Dpinctrl-meson-axg-pmx.c1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
3 * Second generation of pinmux driver for Amlogic Meson-AXG SoC.
13 * This new generation of pinctrl IP is mainly adopted by the
14 * Meson-AXG SoC and later series, which use 4-width continuous
25 #include "pinctrl-meson.h"
26 #include "pinctrl-meson-axg-pmx.h"
33 const struct meson_axg_pmx_data *pmx = pc->data->pmx_data; in meson_axg_pmx_get_bank()
35 for (i = 0; i < pmx->num_pmx_banks; i++) in meson_axg_pmx_get_bank()
36 if (pin >= pmx->pmx_banks[i].first && in meson_axg_pmx_get_bank()
37 pin <= pmx->pmx_banks[i].last) { in meson_axg_pmx_get_bank()
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/linux/drivers/gpu/drm/i915/display/
H A Dintel_tv_regs.h1 /* SPDX-License-Identifier: MIT */
28 /* Enables slow sync generation (945GM only) */
41 /* Sets the colorburst to PAL mode. Required for non-M PAL modes. */
56 /* Read-only state that reports all features enabled */
58 /* Read-only state that reports that Macrovision is disabled in hardware*/
60 /* Read-only state that reports that TV-out is disabled in hardware. */
64 /* Encoder test pattern 1 - combo pattern */
66 /* Encoder test pattern 2 - full screen vertical 75% color bars */
68 /* Encoder test pattern 3 - full screen horizontal 75% color bars */
70 /* Encoder test pattern 4 - random noise */
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/linux/Documentation/sound/cards/
H A Dpcmtest.rst1 .. SPDX-License-Identifier: GPL-2.0
16 * Generate random or pattern-based capturing data
21 non-interleaved access modes.
24 which is used in the corresponding selftest (alsa/pcmtest-test.sh) to check the PCM middle
29 -------------
33 * fill_mode (bool) - Buffer fill mode (see below)
40 Capture Data Generation
41 -----------------------
43 The driver has two modes of data generation: the first (0 in the fill_mode parameter)
44 means random data generation, the second (1 in the fill_mode) - pattern-based
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/linux/fs/btrfs/
H A Dextent_map.c1 // SPDX-License-Identifier: GPL-2.0
11 #include "disk-io.h"
21 return -ENOMEM; in btrfs_extent_map_init()
36 tree->root = RB_ROOT; in btrfs_extent_map_tree_init()
37 INIT_LIST_HEAD(&tree->modified_extents); in btrfs_extent_map_tree_init()
38 rwlock_init(&tree->lock); in btrfs_extent_map_tree_init()
51 RB_CLEAR_NODE(&em->rb_node); in btrfs_alloc_extent_map()
52 refcount_set(&em->refs, 1); in btrfs_alloc_extent_map()
53 INIT_LIST_HEAD(&em->list); in btrfs_alloc_extent_map()
65 if (refcount_dec_and_test(&em->refs)) { in btrfs_free_extent_map()
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/linux/arch/nios2/mm/
H A Dmmu_context.c22 #define PID_MASK ((1UL << PID_BITS) - 1)
25 #define VERSION_BITS (32 - PID_BITS)
27 #define VERSION_MASK ((1UL << VERSION_BITS) - 1)
35 /* Value of the first context (version 1, pid 0) */
72 /* If the version wraps we start over with the first generation, we do in get_new_context()
88 * generation then we have it should get a new generation/pid */ in switch_mm()
89 if (unlikely(CTX_VERSION(next->context) != in switch_mm()
91 next->context = get_new_context(); in switch_mm()
94 pgd_current = next->pgd; in switch_mm()
97 set_context(next->context); in switch_mm()
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/linux/include/dt-bindings/memory/
H A Dmt2701-larb-port.h1 /* SPDX-License-Identifier: GPL-2.0-only */
11 * Mediatek m4u generation 1 such as mt2701 has flat m4u port numbers,
12 * the first port's id for larb[N] would be the last port's id of larb[N - 1]
13 * plus one while larb[0]'s first port number is 0. The definition of
15 * But m4u generation 2 like mt8173 have different port number, it use fixed
16 * offset for each larb, the first port's id for larb[N] would be (N * 32).
/linux/include/linux/
H A Dmmzone.h1 /* SPDX-License-Identifier: GPL-2.0 */
19 #include <linux/pageblock-flags.h>
20 #include <linux/page-flags-layout.h>
23 #include <linux/page-flags.h>
28 /* Free memory management - zoned buddy allocator. */
99 * __dump_folio() in mm/debug.c passes a folio pointer to on-stack struct folio,
103 (get_pfnblock_migratetype(&folio->page, pfn) == MIGRATE_CMA)
136 get_pageblock_migratetype(&folio->page)
160 /* First 128 byte cacheline (assuming 64 bit words) */
220 NR_KERNEL_MISC_RECLAIMABLE, /* reclaimable non-slab kernel pages */
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/linux/Documentation/devicetree/bindings/nvmem/
H A Dbrcm,ocotp.txt4 - compatible: "brcm,ocotp" for the first generation Broadcom OTPC which is used
5 in Cygnus and supports 32 bit read/write. Use "brcm,ocotp-v2" for the second
6 generation Broadcom OTPC which is used in SoC's such as Stingray and supports
7 64-bit read/write.
8 - reg: Base address of the OTP controller.
9 - brcm,ocotp-size: Amount of memory available, in 32 bit words
16 brcm,ocotp-size = <2048>;
/linux/net/batman-adv/
H A Dhash.h1 /* SPDX-License-Identifier: GPL-2.0 */
31 * Return: an index based on the key in the data of the first argument and the
38 * struct batadv_hashtable - Wrapper of simple hlist based hashtable
50 /** @generation: current (generation) sequence number */
51 atomic_t generation; member
65 * batadv_hash_add() - adds data to the hashtable
73 * and -1 on error.
82 int ret = -1; in batadv_hash_add()
90 index = choose(data, hash->size); in batadv_hash_add()
91 head = &hash->table[index]; in batadv_hash_add()
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/linux/Documentation/admin-guide/media/
H A Dtechnisat.rst1 .. SPDX-License-Identifier: GPL-2.0
13 -----------------------------
17 First start your linux box with a shipped kernel:
19 .. code-block:: none
21 lspci -vvv for a PCI device (lsusb -vvv for an USB device) will show you for example:
29 -------------------
37 (except ``Simple tuner support`` for ATSC 3rd generation only -> see case 9 please).
41 - Main module part:
50 - Frontend / Tuner / Demodulator module part:
55 - SkyStar DVB-S Revision 2.3:
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/linux/sound/firewire/fireworks/
H A Dfireworks_transaction.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * fireworks_transaction.c - a part of driver for Fireworks based devices
5 * Copyright (c) 2013-2014 Takashi Sakamoto
14 * At first, 6 data exist. Following to the data, parameters for each command
22 * data[6-]: Parameters
81 t.seqnum = be32_to_cpu(((struct snd_efw_transaction *)cmd)->seqnum) + 1; in snd_efw_transaction_run()
104 dev_err(&t.unit->devic in snd_efw_transaction_run()
165 handle_resp_for_user(struct fw_card * card,int generation,int source,void * data,size_t length,int * rcode) handle_resp_for_user() argument
197 handle_resp_for_kernel(struct fw_card * card,int generation,int source,void * data,size_t length,int * rcode,u32 seqnum) handle_resp_for_kernel() argument
228 efw_response(struct fw_card * card,struct fw_request * request,int tcode,int destination,int source,int generation,unsigned long long offset,void * data,size_t length,void * callback_data) efw_response() argument
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/linux/drivers/media/pci/tw686x/
H A DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
10 Support for Intersil/Techwell TW686x-based frame grabber cards.
13 - TW6864 (4 video channels),
14 - TW6865 (4 video channels, not tested, second generation chip),
15 - TW6868 (8 video channels but only 4 first channels using
16 built-in video decoder are supported, not tested),
17 - TW6869 (8 video channels, second generation chip).
/linux/sound/firewire/tascam/
H A Dtascam-transaction.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * tascam-transaction.c - a part of driver for TASCAM FireWire series
57 return -EINVAL; in calculate_message_bytes()
67 /* The first byte is used for label, the rest for MIDI bytes. */ in fill_message()
68 label = port->buf; in fill_message()
69 msg = port->buf + 1; in fill_message()
76 if (port->on_sysex) { in fill_message()
80 port->on_sysex = false; in fill_message()
86 if (!port->on_sysex) { in fill_message()
88 *label = (substream->number << 4) | 0x07; in fill_message()
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/linux/drivers/md/dm-vdo/
H A Dblock-map.h1 /* SPDX-License-Identifier: GPL-2.0-only */
13 #include "admin-state.h"
16 #include "int-map.h"
20 #include "wait-queue.h"
29 * radix trees assigned to that zone. The concurrency guarantees of this single-threaded model
30 * allow the code to omit more fine-grained locking for the block map structures.
42 * Generation counter for page references.
56 /* Whether the VDO is doing a read-only rebuild */
69 /* free page list (oldest first) */
113 /* this page is valid and un-modified */
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/linux/arch/arc/include/asm/
H A Dmmu_context.h1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
6 * -Refactored get_new_mmu_context( ) to only handle live-mm.
7 * retiring-mm handled in other hooks
10 * -Major rewrite of Core ASID allocation routine get_new_mmu_context
21 #include <asm-generic/mm_hooks.h>
25 * MMU tags TLBs with an 8-bit ASID, avoiding need to flush the TLB on
26 * context-switch.
32 * Each task is assigned unique ASID, with a simple round-robin allocator
33 * tracked in @asid_cpu. When 8-bit value rolls over,a new cycle is started
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/linux/Documentation/admin-guide/hw-vuln/
H A Dvmscape.rst1 .. SPDX-License-Identifier: GPL-2.0
10 guest-userspace may be able to attack the guest-kernel using the hypervisor as
14 -------------------
19 - Skylake generation (Parts without Enhanced-IBRS)
20 - Cascade Lake generation - (Parts affected by ITS guest/host separation)
21 - Alder Lake and newer (Parts affected by BHI)
27 - Zen series (families 0x17, 0x19, 0x1a)
30 - Family 0x18
33 ----------
36 ----------------
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/linux/Documentation/ABI/testing/
H A Dsysfs-driver-hid-wiimote24 Starting with kernel-version 3.11 Motion Plus hotplugging is
26 extension. You will get uevent notifications for the motion-plus
40 Other strings for each device-type are available and may be
41 added if new device-specific detections are added.
45 gen10: First Wii Remote generation
46 gen20: Second Wii Remote Plus generation
59 First, 0kg values for all 4 sensors are written, followed by the
64 values but may be used by user-space to perform other
72 pro-controller. It provides a single line with 4 calibration
74 is prefixed with a +/-. Each value is a signed 16bit number.
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/linux/drivers/infiniband/hw/hfi1/
H A Dtid_rdma.c1 // SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
3 * Copyright(c) 2018 - 2020 Intel Corporation.
18 * This is an end-to-end protocol at the hfi1 level between two nodes that
24 * -- The total data length should be greater than 256K;
25 * -- The total data length should be a multiple of 4K page size;
26 * -- Each local scatter-gather entry should be 4K page aligned;
27 * -- Each local scatter-gather entry should be a multiple of 4K page size;
37 /* Maximum number of packets within a flow generation. */
47 /* Reserved generation value to set to unused flows for kernel contexts */
56 #define HFI1_KERNEL_MAX_JKEY (2 * HFI1_ADMIN_JKEY_RANGE - 1)
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/linux/Documentation/admin-guide/device-mapper/
H A Ddm-zoned.rst2 dm-zoned
5 The dm-zoned device mapper target exposes a zoned block device (ZBC and
7 pattern constraints. In effect, it implements a drive-managed zoned
10 host-managed zoned block devices and can mitigate the potential
11 device-side performance degradation due to excessive random writes on
12 host-aware zoned block devices.
21 http://www.t13.org/Documents/UploadedDocuments/docs2015/di537r05-Zoned_Device_ATA_Command_Set_ZAC.p…
23 The dm-zoned implementation is simple and minimizes system overhead (CPU
25 host-managed disk with 256 MB zones, dm-zoned memory usage per disk
29 dm-zoned target devices are formatted and checked using the dmzadm
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/linux/Documentation/networking/dsa/
H A Dsja1105.rst8 The NXP SJA1105 is a family of 10 SPI-managed automotive switches:
10 - SJA1105E: First generation, no TTEthernet
11 - SJA1105T: First generation, TTEthernet
12 - SJA1105P: Second generation, no TTEthernet, no SGMII
13 - SJA1105Q: Second generation, TTEthernet, no SGMII
14 - SJA1105R: Second generation, no TTEthernet, SGMII
15 - SJA1105S: Second generation, TTEthernet, SGMII
16 - SJA1110A: Third generation, TTEthernet, SGMII, integrated 100base-T1 and
17 100base-TX PHYs
18 - SJA1110B: Third generation, TTEthernet, SGMII, 100base-T1, 100base-TX
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/linux/include/uapi/linux/
H A Dbtrfs_tree.h1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
44 * chunk tree stores translations from logical -> physical block numbering
83 #define BTRFS_BALANCE_OBJECTID -4ULL
86 #define BTRFS_ORPHAN_OBJECTID -5ULL
89 #define BTRFS_TREE_LOG_OBJECTID -6ULL
90 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
93 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
94 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
101 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
104 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
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