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/linux-6.8/Documentation/i2c/
Di2c-topology.rst6 than a straight-forward I2C bus with one adapter and one or more devices.
23 each adapter has a parent adapter (except the root adapter) and zero or
25 I2C transfers, and all adapters with a parent are part of an "i2c-mux"
40 mux-locked or parent-locked muxes.
43 Mux-locked muxes
44 ----------------
46 Mux-locked muxes does not lock the entire parent adapter during the
47 full select-transfer-deselect transaction, only the muxes on the parent
48 adapter are locked. Mux-locked muxes are mostly interesting if the
50 their tasks. Since the parent adapter is not fully locked during the
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/linux-6.8/Documentation/filesystems/
Ddirectory-locking.rst7 kinds of locks - per-inode (->i_rwsem) and per-filesystem
8 (->s_vfs_rename_mutex).
10 When taking the i_rwsem on multiple non-directory objects, we
30 * lock the parent (exclusive)
36 * lock the parent (exclusive)
40 5. rename that is _not_ cross-directory. Locking rules:
42 * lock the parent (exclusive)
44 * decide which of the source and target need to be locked.
45 The source needs to be locked if it's a non-directory, target - if it's
46 a non-directory or about to be removed.
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/linux-6.8/Documentation/devicetree/bindings/i2c/
Di2c-mux-gpmux.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/i2c/i2c-mux-gpmux.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Peter Rosin <peda@axentia.se>
16 .-----. .-----.
18 .------------. '-----' '-----'
20 | | .--------+--------'
21 | .------. | .------+ child bus A, on MUX value set to 0
22 | | I2C |-|--| Mux |
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/linux-6.8/Documentation/netlink/specs/
Ddpll.yaml1 # SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)
8 -
16 -
20 -
23 render-max: true
24 -
26 name: lock-status
31 -
34 dpll was not yet locked to any valid input (or forced by setting
37 -
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/linux-6.8/drivers/i2c/
Di2c-mux.c4 * Copyright (c) 2008-2009 Rodolfo Giometti <giometti@linux.it>
5 * Copyright (c) 2008-2009 Eurotech S.p.A. <info@eurotech.it>
6 * Copyright (c) 2009-2010 NSN GmbH & Co KG <michael.lawnick.ext@nsn.com>
10 * Supports multi-level mux'ing (mux behind a mux).
13 * i2c-virt.c from Kumar Gala <galak@kernel.crashing.org>
14 * i2c-virtual.c from Ken Harrenstien, Copyright (c) 2004 Google, Inc.
15 * i2c-virtual.c from Brian Kuschak <bkuschak@yahoo.com>
24 #include <linux/i2c-mux.h>
42 struct i2c_mux_priv *priv = adap->algo_data; in __i2c_mux_master_xfer()
43 struct i2c_mux_core *muxc = priv->muxc; in __i2c_mux_master_xfer()
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/linux-6.8/drivers/staging/vme_user/
Dvme_bridge.h1 /* SPDX-License-Identifier: GPL-2.0 */
13 struct vme_bridge *parent; member
19 int locked; member
30 struct vme_bridge *parent; member
32 int locked; member
56 struct vme_dma_resource *parent; member
63 struct vme_bridge *parent; member
65 int locked; member
74 struct vme_bridge *parent; member
76 int locked; member
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Dvme.c1 // SPDX-License-Identifier: GPL-2.0-or-later
24 #include <linux/dma-mapping.h>
51 switch (resource->type) { in find_bridge()
53 return list_entry(resource->entry, struct vme_master_resource, in find_bridge()
54 list)->parent; in find_bridge()
56 return list_entry(resource->entry, struct vme_slave_resource, in find_bridge()
57 list)->parent; in find_bridge()
59 return list_entry(resource->entry, struct vme_dma_resource, in find_bridge()
60 list)->parent; in find_bridge()
62 return list_entry(resource->entry, struct vme_lm_resource, in find_bridge()
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/linux-6.8/fs/btrfs/
Ddefrag.c1 // SPDX-License-Identifier: GPL-2.0
8 #include "disk-io.h"
9 #include "print-tree.h"
14 #include "delalloc-space.h"
17 #include "file-item.h"
42 * This value is different for compressed/non-compressed extents, thus
52 if (defrag1->root > defrag2->root) in __compare_inode_defrag()
54 else if (defrag1->root < defrag2->root) in __compare_inode_defrag()
55 return -1; in __compare_inode_defrag()
56 else if (defrag1->ino > defrag2->ino) in __compare_inode_defrag()
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/linux-6.8/drivers/gpu/drm/i915/
Di915_scheduler.c2 * SPDX-License-Identifier: MIT
47 GEM_BUG_ON(rb_first_cached(&sched_engine->queue) != in assert_priolists()
48 rb_first(&sched_engine->queue.rb_root)); in assert_priolists()
51 for (rb = rb_first_cached(&sched_engine->queue); rb; rb = rb_next(rb)) { in assert_priolists()
54 GEM_BUG_ON(p->priority > last_prio); in assert_priolists()
55 last_prio = p->priority; in assert_priolists()
63 struct rb_node **parent, *rb; in i915_sched_lookup_priolist() local
66 lockdep_assert_held(&sched_engine->lock); in i915_sched_lookup_priolist()
69 if (unlikely(sched_engine->no_priolist)) in i915_sched_lookup_priolist()
75 parent = &sched_engine->queue.rb_root.rb_node; in i915_sched_lookup_priolist()
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/linux-6.8/drivers/clk/ti/
Ddpll3xxx.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * OMAP3/4 - specific DPLL control functions
5 * Copyright (C) 2009-2010 Texas Instruments, Inc.
6 * Copyright (C) 2009-2010 Nokia Corporation
46 /* _omap3_dpll_write_clken - write clken_bits arg to a DPLL's enable bits */
52 dd = clk->dpll_data; in _omap3_dpll_write_clken()
54 v = ti_clk_ll_ops->clk_readl(&dd->control_reg); in _omap3_dpll_write_clken()
55 v &= ~dd->enable_mask; in _omap3_dpll_write_clken()
56 v |= clken_bits << __ffs(dd->enable_mask); in _omap3_dpll_write_clken()
57 ti_clk_ll_ops->clk_writel(v, &dd->control_reg); in _omap3_dpll_write_clken()
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/linux-6.8/drivers/pci/pcie/
Daspm.c1 // SPDX-License-Identifier: GPL-2.0
52 struct pcie_link_state *parent; /* pointer to the parent Link state */ member
104 list_for_each_entry(child, &linkbus->devices, bus_list) in pci_function_0()
105 if (PCI_FUNC(child->devfn) == 0) in pci_function_0()
123 return link->aspm_default; in policy_to_aspm_state()
139 return link->clkpm_default; in policy_to_clkpm_state()
147 struct pci_bus *linkbus = link->pdev->subordinate; in pcie_set_clkpm_nocheck()
150 list_for_each_entry(child, &linkbus->devices, bus_list) in pcie_set_clkpm_nocheck()
154 link->clkpm_enabled = !!enable; in pcie_set_clkpm_nocheck()
163 if (!link->clkpm_capable || link->clkpm_disable) in pcie_set_clkpm()
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/linux-6.8/fs/reiserfs/
Dfix_node.c39 "vs-8005: for INSERT mode and item number of inserted item"); in old_item_num()
41 return new_num - 1; in old_item_num()
45 "vs-8010: old_item_num: mode must be M_DELETE (mode = \'%c\'", in old_item_num()
54 struct virtual_node *vn = tb->tb_vn; in create_virtual_node()
56 struct buffer_head *Sh; /* this comes from tb->S[h] */ in create_virtual_node()
58 Sh = PATH_H_PBUFFER(tb->tb_path, h); in create_virtual_node()
61 vn->vn_size = in create_virtual_node()
62 MAX_CHILD_SIZE(Sh) - B_FREE_SPACE(Sh) + tb->insert_size[h]; in create_virtual_node()
66 vn->vn_nr_item = (vn->vn_size - DC_SIZE) / (DC_SIZE + KEY_SIZE); in create_virtual_node()
71 vn->vn_nr_item = in create_virtual_node()
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/linux-6.8/drivers/gpu/drm/
Ddrm_privacy_screen.c1 // SPDX-License-Identifier: MIT
3 * Copyright (C) 2020 - 2021 Red Hat, Inc.
24 * register a privacy-screen device, which the KMS drivers can then use
25 * to implement the standard privacy-screen properties, see
28 * KMS drivers using a privacy-screen class device are advised to use the
45 * drm_privacy_screen_lookup_add - add an entry to the static privacy-screen
49 * Add an entry to the static privacy-screen lookup list. Note the
51 * gets added to a list owned by the privacy-screen core. So the passed in
52 * &struct drm_privacy_screen_lookup must not be free-ed until it is removed
58 list_add(&lookup->list, &drm_privacy_screen_lookup_list); in drm_privacy_screen_lookup_add()
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Ddrm_vma_manager.c1 // SPDX-License-Identifier: GPL-2.0 OR MIT
3 * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA
39 * The vma-manager is responsible to map arbitrary driver-dependent memory
40 * regions into the linear user address-space. It provides offsets to the
41 * caller which can then be used on the address_space of the drm-device. It
43 * confuse mm-core by inconsistent fake vm_pgoff fields.
45 * only be used to manage mappings into linear user-space VMs.
48 * optimized for alloc/free calls, not lookups. Hence, we use an rb-tree to
52 * Otherwise, mm-core will be unable to tear down memory mappings as the VM will
55 * This offset manager works on page-based addresses. That is, every argument
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/linux-6.8/drivers/net/ethernet/netronome/nfp/nfpcore/
Dnfp_cppcore.c1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 /* Copyright (C) 2015-2018 Netronome Systems, Inc. */
6 * Provides low-level access to the NFP's internal CPP bus
39 * struct nfp_cpp - main nfpcore device structure
40 * Following fields are read-only after probe() exits or netdevs are spawned.
42 * @op: low-level implementation ops
43 * @priv: private data of the low-level implementation
115 if (tmp->cpp_id > res->cpp_id) in __resource_add()
118 if (tmp->cpp_id == res->cpp_id && tmp->start > res->start) in __resource_add()
122 list_add_tail(&res->list, pos); in __resource_add()
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/linux-6.8/drivers/gpu/drm/xe/
Dxe_pt.c1 // SPDX-License-Identifier: MIT
23 /** @children: Array of page-table child nodes */
28 #define xe_pt_set_addr(__xe_pt, __addr) ((__xe_pt)->addr = (__addr))
29 #define xe_pt_addr(__xe_pt) ((__xe_pt)->addr)
38 #define XE_PT_HIGHEST_LEVEL (ARRAY_SIZE(xe_normal_pt_shifts) - 1)
47 return container_of(pt_dir->children[index], struct xe_pt, base); in xe_pt_entry()
54 u16 pat_index = xe->pat.idx[XE_CACHE_WB]; in __xe_pt_empty_pte()
55 u8 id = tile->id; in __xe_pt_empty_pte()
61 return vm->pt_ops->pde_encode_bo(vm->scratch_pt[id][level - 1]->bo, in __xe_pt_empty_pte()
64 return vm->pt_ops->pte_encode_addr(xe, 0, pat_index, level, IS_DGFX(xe), 0) | in __xe_pt_empty_pte()
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/linux-6.8/arch/x86/kernel/cpu/resctrl/
Dinternal.h1 /* SPDX-License-Identifier: GPL-2.0 */
31 #define MBM_CNTR_WIDTH_OFFSET_MAX (62 - MBM_CNTR_WIDTH_BASE)
39 /* Non-Temporal Writes to Local Memory */
42 /* Non-Temporal Writes to Remote Memory */
67 struct kernfs_fs_context *kfc = fc->fs_private; in rdt_fc2context()
76 * struct mon_evt - Entry in the event list of a resource
80 * @list: entry in &rdt_resource->evt_list
90 * union mon_data_bits - Monitoring details for each event file
129 * enum rdtgrp_mode - Mode of a RDT resource group
132 * @RDT_MODE_PSEUDO_LOCKSETUP: Resource group will be used for Pseudo-Locking
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/linux-6.8/Documentation/driver-api/mmc/
Dmmc-dev-parts.rst10 parent /dev/mmcblkX.
21 To enable write access to /dev/mmcblkXbootY, disable the forced read-only
26 To re-enable read-only access::
30 The boot partitions can also be locked read only until the next power on,
37 feature has been disabled on the card, the file will be read-only.
39 The boot partitions can also be locked permanently, but this feature is
/linux-6.8/net/sunrpc/
Dsysfs.c1 // SPDX-License-Identifier: GPL-2.0
21 kfree(addr->addr); in free_xprt_addr()
47 struct kobject *parent) in rpc_sysfs_object_alloc() argument
53 kobj->kset = kset; in rpc_sysfs_object_alloc()
55 parent, "%s", name) == 0) in rpc_sysfs_object_alloc()
68 return xprt_get(x->xprt); in rpc_sysfs_xprt_kobj_get_xprt()
77 return xprt_switch_get(x->xprt_switch); in rpc_sysfs_xprt_kobj_get_xprt_switch()
86 return xprt_switch_get(x->xprt_switch); in rpc_sysfs_xprt_switch_kobj_get_xprt()
100 ret = sprintf(buf, "%s\n", xprt->address_strings[RPC_DISPLAY_ADDR]); in rpc_sysfs_xprt_dstaddr_show()
116 } else if (xprt->ops->get_srcaddr) { in rpc_sysfs_xprt_srcaddr_show()
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/linux-6.8/drivers/clocksource/
Dtimer-tegra186.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2019-2020 NVIDIA Corporation. All rights reserved.
61 struct tegra186_timer *parent; member
72 bool locked; member
95 writel_relaxed(value, tmr->regs + offset); in tmr_writel()
100 writel_relaxed(value, wdt->regs + offset); in wdt_writel()
105 return readl_relaxed(wdt->regs + offset); in wdt_readl()
114 tmr = devm_kzalloc(tegra->dev, sizeof(*tmr), GFP_KERNEL); in tegra186_tmr_create()
116 return ERR_PTR(-ENOMEM); in tegra186_tmr_create()
118 tmr->parent = tegra; in tegra186_tmr_create()
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/linux-6.8/drivers/phy/freescale/
Dphy-fsl-imx8qm-lvds-phy.c1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2017-2020,2022 NXP
68 struct mixel_lvds_phy_priv *priv = dev_get_drvdata(phy->dev.parent); in mixel_lvds_phy_init()
70 mutex_lock(&priv->lock); in mixel_lvds_phy_init()
71 regmap_update_bits(priv->regmap, in mixel_lvds_phy_init()
73 mutex_unlock(&priv->lock); in mixel_lvds_phy_init()
80 struct mixel_lvds_phy_priv *priv = dev_get_drvdata(phy->dev.parent); in mixel_lvds_phy_power_on()
82 struct mixel_lvds_phy *companion = priv->phys[lvds_phy->id ^ 1]; in mixel_lvds_phy_power_on()
83 struct phy_configure_opts_lvds *cfg = &lvds_phy->cfg; in mixel_lvds_phy_power_on()
85 u32 locked; in mixel_lvds_phy_power_on() local
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/linux-6.8/Documentation/devicetree/bindings/clock/ti/
Dapll.txt3 Binding status: Unstable - ABI compatibility may be broken in the future
6 register-mapped APLL with usually two selectable input clocks
7 (reference clock and bypass clock), with analog phase locked
10 modes (locked, low power stop etc.) APLL mostly behaves like
13 [1] Documentation/devicetree/bindings/clock/clock-bindings.txt
17 - compatible : shall be "ti,dra7-apll-clock" or "ti,omap2-apll-clock"
18 - #clock-cells : from common clock binding; shall be set to 0.
19 - clocks : link phandles of parent clocks (clk-ref and clk-bypass)
20 - reg : address and length of the register set for controlling the APLL.
22 "control" - contains the control register offset
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Ddpll.txt3 Binding status: Unstable - ABI compatibility may be broken in the future
6 register-mapped DPLL with usually two selectable input clocks
7 (reference clock and bypass clock), with digital phase locked
10 modes (locked, low power stop etc.) This binding has several
11 sub-types, which effectively result in slightly different setup
14 [1] Documentation/devicetree/bindings/clock/clock-bindings.txt
17 - compatible : shall be one of:
18 "ti,omap3-dpll-clock",
19 "ti,omap3-dpll-core-clock",
20 "ti,omap3-dpll-per-clock",
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/linux-6.8/fs/
Ddcache.c1 // SPDX-License-Identifier: GPL-2.0-only
6 * (C) 1997 Thomas Schoebel-Theuer,
13 * The dcache is a master of the icache - whenever a dcache entry
40 * dcache->d_inode->i_lock protects:
41 * - i_dentry, d_u.d_alias, d_inode of aliases
43 * - the dcache hash table
45 * - the s_roots list (see __d_drop)
46 * dentry->d_sb->s_dentry_lru_lock protects:
47 * - the dcache lru lists and counters
49 * - d_flags
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/linux-6.8/drivers/usb/core/
Dusb.c1 // SPDX-License-Identifier: GPL-2.0
6 * (C) Copyright Johannes Erdfelt 1999-2001
11 * (C) Copyright David Brownell 2000-2004
14 * (C) Copyright Greg Kroah-Hartman 2002-2003
46 #include <linux/dma-mapping.h>
119 * usb_find_common_endpoints() -- look up common endpoint descriptors
126 * Search the alternate setting's endpoint descriptors for the first bulk-in,
127 * bulk-out, interrupt-in and interrupt-out endpoints and return them in the
133 * Return: Zero if all requested descriptors were found, or -ENXIO otherwise.
153 for (i = 0; i < alt->desc.bNumEndpoints; ++i) { in usb_find_common_endpoints()
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