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/linux/Documentation/devicetree/bindings/net/
H A Dmdio.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Andrew Lunn <andrew@lunn.ch>
11 - Florian Fainelli <f.fainelli@gmail.com>
12 - Heiner Kallweit <hkallweit1@gmail.com>
17 bus. These should follow the generic ethernet-phy.yaml document, or
22 pattern: '^mdio(-(bus|external))?(@.+|-([0-9]+))?$'
24 "#address-cells":
27 "#size-cells":
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/linux/Documentation/fb/
H A Dvesafb.rst2 vesafb - Generic graphic framebuffer driver
7 The idea is simple: Turn on graphics mode at boot time with the help
20 * You can run XF68_FBDev on top of /dev/fb0 (=> non-accelerated X11
22 * Most important: boot logo :-)
33 Documentation/admin-guide/svga.rst for details.
81 "vga=mode-number" you have to transform the numbers to decimal.
88 XF68_FBDev should work just fine, but it is non-accelerated. Running
89 another (accelerated) X-Server like XF86_SVGA might or might not work.
90 It depends on X-Server and graphics board.
92 The X-Server must restore the video mode correctly, else you end up
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/linux/drivers/net/mdio/
H A Dfwnode_mdio.c1 // SPDX-License-Identifier: GPL-2.0-only
14 #include <linux/pse-pd/pse.h>
35 if (PTR_ERR(psec) == -ENOENT) in fwnode_find_pse_control()
53 if (err == -ENOENT) in fwnode_find_mii_timestamper()
59 mii_ts = ERR_PTR(-EINVAL); in fwnode_find_mii_timestamper()
80 if (rc == -EPROBE_DEFER) in fwnode_mdiobus_phy_device_register()
81 rc = driver_deferred_probe_check_state(&phy->mdio.dev); in fwnode_mdiobus_phy_device_register()
82 if (rc == -EPROBE_DEFER) in fwnode_mdiobus_phy_device_register()
86 phy->irq = rc; in fwnode_mdiobus_phy_device_register()
87 mdio->irq[addr] = rc; in fwnode_mdiobus_phy_device_register()
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/linux/Documentation/process/
H A D4.Coding.rst6 While there is much to be said for a solid and community-oriented design
19 ---------
25 :ref:`Documentation/process/coding-style.rst <codingstyle>`. For much of
38 strangely-formatted code.
43 giving up a degree of control in a number of ways - including control over
49 as a way of getting their name into the kernel changelogs - or both. But
59 80-column limit, for example), just do it.
61 Note that you can also use the ``clang-format`` tool to help you with
62 these rules, to quickly re-format parts of your code automatically,
66 See the file :ref:`Documentation/dev-tools/clang-format.rst <clangformat>`
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H A Dmaintainer-kvm-x86.rst1 .. SPDX-License-Identifier: GPL-2.0
7 --------
17 -----
21 -----
25 specific tree, ``github.com/kvm-x86/linux.git``.
39 using finer-grained topic branches is to make it easier to keep tabs on an area
42 in-flight commits' SHA1 hashes, and having to reject a pull request due to bugs
46 via a Cthulhu merge on an as-needed basis, i.e. when a topic branch is updated.
61 close around rc5 for new features, and a soft close around rc6 for fixes (for
69 Patches that will be taken through a non-KVM tree (most often through the tip
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H A Dapplying-patches.rst54 in the patch file when applying it (the ``-p1`` argument to ``patch`` does
57 To revert a previously applied patch, use the -R argument to patch.
60 patch -p1 < ../patch-x.y.z
64 patch -R -p1 < ../patch-x.y.z
76 patch -p1 < path/to/patch-x.y.z
82 Patch can also get the name of the file to use via the -i argument, like
85 patch -p1 -i path/to/patch-x.y.z
91 xzcat path/to/patch-x.y.z.xz | patch -p1
92 bzcat path/to/patch-x.y.z.gz | patch -p1
96 gunzip or xz on the file -- like this::
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H A D2.Process.rst14 ---------------
16 The kernel developers use a loosely time-based release process, with a new
53 be called 5.6-rc1. The -rc1 release is the signal that the time to
63 exception is made for drivers for previously-unsupported hardware; if they
64 touch no in-tree code, they cannot cause regressions and should be safe to
68 time. Linus releases new -rc kernels about once a week; a normal series
69 will get up to somewhere between -rc6 and -rc9 before the kernel is
78 September 30 5.4-rc1, merge window closes
79 October 6 5.4-rc2
80 October 13 5.4-rc3
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/linux/Documentation/power/
H A Dswsusp.rst32 power states like "standby", which normally don't turn USB off.)
47 - If you feel ACPI works pretty well on your system, you might try::
51 - If you would like to write hibernation image to swap and then suspend
56 - If you have SATA disks, you'll need recent kernels with SATA suspend
58 are built into kernel -- not modules. [There's way to make
66 before suspend (it is limited to around 2/5 of available RAM by default).
68 - The resume process checks for the presence of the resume device,
72 - The resume process may be triggered in two ways:
81 read-only) otherwise data may be corrupted.
87 Last revised: 2003-10-20 by Pavel Machek
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/linux/arch/x86/kernel/cpu/
H A Dintel.c1 // SPDX-License-Identifier: GPL-2.0
21 #include <asm/intel-family.h>
32 * Processors which have self-snooping capability can handle conflicting
40 switch (c->x86_vfm) { in check_memory_type_self_snoop_errata()
72 if (c->x86 != 6) in probe_xeon_phi_r3mwait()
74 switch (c->x86_vfm) { in probe_xeon_phi_r3mwait()
94 * Early microcode releases for the Spectre v2 mitigation were broken.
96 * - https://newsroom.intel.com/wp-content/uploads/sites/11/2018/03/microcode-update-guidance.pdf
97 * - https://kb.vmware.com/s/article/52345
98 * - Microcode revisions observed in the wild
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/linux/arch/x86/
H A DKconfig1 # SPDX-License-Identifier: GPL-2.0
4 bool "64-bit kernel" if "$(ARCH)" = "x86"
7 Say yes to build a 64-bit kernel - formerly known as x86_64
8 Say no to build a 32-bit kernel - formerly known as i386
13 # Options that are inherently 32-bit kernel only:
26 # Options that are inherently 64-bit kernel only:
47 We keep the static function tracing (!DYNAMIC_FTRACE) around
50 only need to keep it around for x86_64. No need to keep it
56 # ported to 32-bit as well. )
158 # Word-size accesses may read uninitialized data past the trailing \0
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/linux/arch/arm64/
H A DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
287 ARM 64-bit (AArch64) Linux support.
295 # required due to use of the -Zfixed-x18 flag.
298 # -Zsanitizer=shadow-call-stack flag.
308 depends on $(cc-option,-fpatchable-function-entry=2)
334 # VA_BITS - PTDESC_TABLE_SHIFT
412 def_bool !$(as-instr,1:\n.inst 0\n.rept . - 1b\n\nnop\n.endr\n)
417 # https://github.com/llvm/llvm-project/commit/2a96f47c5ffca84cd774ad402cacd137f4bf45e2
456 This option adds an alternative code sequence to work around Ampere
467 at stage-2.
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/linux/drivers/char/agp/
H A Duninorth-agp.c1 // SPDX-License-Identifier: GPL-2.0-only
42 A_SIZE_32(agp_bridge->driver->aperture_sizes); in uninorth_fetch_size()
50 for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) in uninorth_fetch_size()
54 if (i == agp_bridge->driver->num_aperture_sizes) { in uninorth_fetch_size()
55 dev_err(&agp_bridge->dev->dev, "invalid aperture size, " in uninorth_fetch_size()
63 for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) in uninorth_fetch_size()
68 agp_bridge->previous_size = in uninorth_fetch_size()
69 agp_bridge->current_size = (void *)(values + i); in uninorth_fetch_size()
70 agp_bridge->aperture_size_idx = i; in uninorth_fetch_size()
80 pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL, in uninorth_tlbflush()
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/linux/fs/nfsd/
H A Dstate.h127 * ->cl_lock protects sc_status for open and lock stateids.
128 * ->st_mutex also protect sc_status for open stateids.
129 * ->ls_lock protects sc_status for layout stateids.
132 * For an open stateid kept around *only* to process close replays.
136 /* For a deleg stateid kept around only to process free_stateid's: */
201 * is broken, put when the rpc exits)
208 * the object will either be destroyed (v4.0) or moved to a per-client list of
266 per-session otherwise */
276 /* Maximum number of slots per session. This is for sanity-check only.
278 * A large number can be needed to get good throughput on high-latency servers.
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/linux/arch/sparc/mm/
H A Dsrmmu.c1 // SPDX-License-Identifier: GPL-2.0
29 #include <asm/io-unit.h>
75 #define FLUSH_BEGIN(mm) if ((mm)->context != NO_CONTEXT) {
98 #define SRMMU_NOCACHE_BITMAP_SHIFT (PAGE_SHIFT - 4)
109 /* XXX should we hyper_flush_whole_icache here - Anton */
158 if (size & (minsz - 1)) { in __srmmu_get_nocache()
161 size += minsz - 1; in __srmmu_get_nocache()
168 if (offset == -1) { in __srmmu_get_nocache()
215 if (vaddr & (size - 1)) { in srmmu_free_nocache()
220 offset = (vaddr - SRMMU_NOCACHE_VADDR) >> SRMMU_NOCACHE_BITMAP_SHIFT; in srmmu_free_nocache()
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/linux/arch/arm/mm/
H A DKconfig1 # SPDX-License-Identifier: GPL-2.0
17 A 32-bit RISC microprocessor based on the ARM7 processor core
36 A 32-bit RISC processor with 8kByte Cache, Write Buffer and
37 MMU built around an ARM7TDMI core.
53 A 32-bit RISC processor with 8KB cache or 4KB variants,
54 write buffer and MPU(Protection Unit) built around
69 A 32-bit RISC microprocessor based on the ARM9 processor core
182 ARM940T is a member of the ARM9TDMI family of general-
184 instruction and 4KB data cases, each with a 4-word line
190 # ARM946E-S
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/linux/drivers/crypto/ccp/
H A Dccp-dev-v5.c1 // SPDX-License-Identifier: GPL-2.0-only
12 #include <linux/dma-mapping.h>
17 #include "ccp-dev.h"
22 * If no space is available, wait around.
31 if (cmd_q->lsb >= 0) { in ccp_lsb_alloc()
32 start = (u32)bitmap_find_next_zero_area(cmd_q->lsbmap, in ccp_lsb_alloc()
36 bitmap_set(cmd_q->lsbmap, start, count); in ccp_lsb_alloc()
37 return start + cmd_q->lsb * LSB_SIZE; in ccp_lsb_alloc()
42 ccp = cmd_q->ccp; in ccp_lsb_alloc()
44 mutex_lock(&ccp->sb_mutex); in ccp_lsb_alloc()
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/linux/Documentation/admin-guide/
H A Dkernel-parameters.txt16 force -- enable ACPI if default was off
17 on -- enable ACPI but allow fallback to DT [arm64,riscv64]
18 off -- disable ACPI if default was on
19 noirq -- do not use ACPI for IRQ routing
20 strict -- Be less tolerant of platforms that are not
22 rsdt -- prefer RSDT over (default) XSDT
23 copy_dsdt -- copy DSDT to memory
24 nocmcff -- Disable firmware first mode for corrected
28 nospcr -- disable console in ACPI SPCR table as
45 If set to vendor, prefer vendor-specific driver
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/linux/include/ufs/
H A Dufshcd.h1 /* SPDX-License-Identifier: GPL-2.0-or-later */
4 * Copyright (C) 2011-2013 Samsung India Software Operations
5 * Copyright (c) 2013-2016, The Linux Foundation. All rights reserved.
16 #include <linux/blk-crypto-profile.h>
17 #include <linux/blk-m
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/linux/sound/pci/
H A Des1968.c1 // SPDX-License-Identifier: GPL-2.0-or-later
9 * Rewritted from card-es1938.c source.
27 * encoding. The codecs are almost always AC-97 compliant codecs,
52 * to have a 512 byte buffer sitting around in wavecache/memory.
73 * the main maestro indirection. Ouch. We spinlock around the actual
79 * We also have an OSS state lock that is thrown around i
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/linux/drivers/scsi/isci/
H A Dinit.c7 * 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.
136 return sysfs_emit(buf, "%d\n", ihost->id); in isci_show_id()
184 /* ata recovery called from ata-eh */
206 * isci_register_sas_ha() - This method initializes various lldd
219 struct sas_ha_struct *sas_ha = &(isci_host->sas_ha); in isci_register_sas_ha()
223 sas_phys = devm_kcalloc(&isci_host->pdev->dev, in isci_register_sas_ha()
227 return -ENOMEM; in isci_register_sas_ha()
229 sas_ports = devm_kcalloc(&isci_host->pdev->dev, in isci_register_sas_ha()
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/linux/drivers/video/fbdev/
H A Dsa1100fb.c16 * linux-arm-kernel@lists.arm.linux.org.uk
26 * - With the Neponset plugged into an Assabet, LCD powerdown
29 * - We don't limit the CPU clock rate nor the mode selection
33 * - Linear grayscale palettes and the kernel.
41 * David Neuer. It's around 8 lines of C code, plus another 4 to
44 * - The following must never be specified in a panel definition:
47 * - The following should be specified:
57 * - Driver appears to be working for Brutus 320x200x8bpp mode. Other
66 * - FrameBuffer memory is now allocated at run-time when the
70 * - Big cleanup for dynamic selection of machine type at run time.
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/linux/drivers/net/ethernet/dec/tulip/
H A Dtulip_core.c1 /* tulip_core.c: A DEC 21x4x-family ethernet driver for Linux.
4 Written/copyright 1994-2001 by Donald Becker.
33 /* A few user-configurable values. */
39 /* Used to pass the full-duplex flag, etc. */
47 "10baseT-FDX", "100baseTx-FDX", "100baseT4", "100baseFx",
48 "100baseFx-FDX", "MII 10baseT", "MII 10baseT-FDX", "MII",
49 "10baseT(forced)", "MII 100baseTx", "MII 100baseTx-FDX", "MII 100baseT4",
50 "MII 100baseFx-HDX", "MII 100baseFx-FDX", "Home-PNA 1Mbps", "Invalid-19",
54 /* Set the copy breakpoint for the copy-only-tiny-buffer Rx structure. */
71 Warning: many older 486 systems are broken and require setting 0x00A04800
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/linux/lib/
H A DKconfig.debug1 # SPDX-License-Identifier: GPL-2.0-only
19 parameter printk.time=1. See Documentation/admin-guide/kernel-parameters.rst
50 int "Default console loglevel (1-15)"
60 Note: This does not affect the log level of un-prefixed printk()
65 int "quiet console loglevel (1-15)"
76 int "Default message log level (1-7)"
82 This was hard-coded to KERN_WARNING since at least 2.6.10 but folks
118 enabled/disabled based on various levels of scope - per source file,
158 nullarbor:~ # echo -n 'file svcsock.c line 1603 +p' >
162 nullarbor:~ # echo -n 'file svcsock.c +p' >
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/linux/kernel/trace/
H A DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
21 API, which will be used by other function-entry hooking
27 See Documentation/trace/ftrace-design.rst
32 See Documentation/trace/ftrace-design.rst
45 See Documentation/trace/ftrace-design.rst
86 See Documentation/trace/ftrace-design.rst
91 Arch supports the gcc options -pg with -mfentry
96 Arch supports the gcc options -pg with -mrecord-mcount and -nop-mcount
101 Arch supports objtool --mcount
106 Arch supports the objtool options --mcount with --mnop.
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/linux/drivers/ata/
H A Data_piix.c1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * ata_piix.c - Intel PATA/SATA controllers
6 * Please ALWAYS copy linux-ide@vger.kernel.org
9 * Copyright 2003-2005 Red Hat Inc
10 * Copyright 2003-2005 Jeff Garzik
14 * Copyright (C) 1998-1999 Andrzej Krzysztofowicz, Author and Maintainer
15 * Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org>
19 * as Documentation/driver-api/libata.rst
40 * PIIX4 errata #9 - Only on ultra obscure hw
41 * ICH3 errata #13 - Not observed to affect real hw
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