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| /Documentation/admin-guide/device-mapper/ |
| D | zero.rst | 2 dm-zero
5 Device-Mapper's "zero" target provides a block-device that always returns
6 zero'd data on reads and silently drops writes. This is similar behavior to
7 /dev/zero, but as a block-device instead of a character-device.
9 Dm-zero has no target-specific parameters.
11 One very interesting use of dm-zero is for creating "sparse" devices in
15 device. Reads to previously unwritten areas will return a zero'd buffer. When
20 To create a sparse device, start by creating a dm-zero device that's the
25 echo "0 $TEN_TERABYTES zero" | dmsetup create zero1
27 Then create a snapshot of the zero device, using any available block-device as
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| /Documentation/userspace-api/media/v4l/ |
| D | vidioc-s-hw-freq-seek.rst | 37 zero out the ``reserved`` array of a struct
41 The ``rangelow`` and ``rangehigh`` fields can be set to a non-zero value
82 - If non-zero, seek upward from the current frequency, else seek
86 - If non-zero, wrap around when at the end of the frequency range,
91 - If non-zero, defines the hardware seek resolution in Hz. The
93 If spacing is zero a reasonable default value is used.
96 - If non-zero, the lowest tunable frequency of the band to search in
102 ``rangelow`` is zero a reasonable default value is used.
105 - If non-zero, the highest tunable frequency of the band to search
111 ``rangehigh`` is zero a reasonable default value is used.
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| D | vidioc-expbuf.rst | 45 range from zero to the number of buffers allocated with
49 the index of the plane to be exported. Valid planes range from zero to
51 the single-planar API, applications must set ``plane`` to zero.
54 and O_RDWR are supported. All other fields must be set to zero. In the
132 zero to the number of buffers allocated with the
138 Otherwise this value must be set to zero.
151 the array to zero.
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| D | vidioc-g-enc-index.rst | 49 ``V4L2_ENC_IDX_ENTRIES``, but not zero. When the application fails to
52 will be zero.
72 zero.
76 array to zero.
99 driver resets the offset to zero.
114 zero.
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| D | vidioc-g-audioout.rst | 38 To query the current audio output applications zero out the ``reserved``
79 field to zero.
83 ``VIDIOC_S_AUDOUT``) must set this field to zero.
87 the array to zero.
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| D | vidioc-g-parm.rst | 125 zero.
132 applications and drivers must set this field to zero. Applications
140 requests zero buffers, drivers should just return the current
146 the array to zero.
185 zero.
192 applications and drivers must set this field to zero. Applications
200 zero buffers, drivers should just return the current setting
206 the array to zero.
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| D | vidioc-dv-timings-cap.rst | 39 initialize the ``pad`` field to 0, zero the reserved array of struct
55 zero the ``reserved`` array. Attempts to query capabilities on a pad
96 Drivers must set the array to zero.
115 video node applications must set this field to zero.
120 Drivers and applications must set the array to zero.
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| D | vidioc-enum-dv-timings.rst | 46 field, set the ``pad`` field to 0, zero the reserved array of struct
51 DV timings, applications shall begin at index zero, incrementing by one
84 video node applications must set this field to zero.
88 the array to zero.
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| /Documentation/userspace-api/media/mediactl/ |
| D | media-ioc-g-topology.rst | 61 this field starts with zero. Every time a graph element is added
75 stored, converted to a 64-bits integer. It can be zero. if zero,
90 stored, converted to a 64-bits integer. It can be zero. if zero,
105 converted to a 64-bits integer. It can be zero. if zero, the ioctl
119 converted to a 64-bits integer. It can be zero. if zero, the ioctl
157 this array to zero.
185 this array to zero.
242 this array to zero.
278 this array to zero.
289 num_interfaces, num_links or num_pads are non-zero and are
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| D | request-func-poll.rst | 45 is non-zero). Request file descriptor set the ``POLLPRI`` flag in ``revents``
47 a value of zero, on failure it returns -1 and the ``errno`` variable is
57 structures which have non-zero ``revents`` fields, or zero if the call
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| /Documentation/devicetree/bindings/mtd/ |
| D | fsmc-nand.txt | 16 are valid. Zero means one clockcycle, 15 means 16 clock
21 Only valid for write transactions. Zero means zero cycles,
24 when writing) after the command deassertation. Zero means
27 NAND flash in response to SMWAITn. Zero means 1 cycle,
30 command is asserted. Zero means one cycle, 255 means 256
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| /Documentation/devicetree/bindings/rtc/ |
| D | moxa,moxart-rtc.txt | 6 - rtc-sclk-gpios : RTC sclk gpio, with zero flags
7 - rtc-data-gpios : RTC data gpio, with zero flags
8 - rtc-reset-gpios : RTC reset gpio, with zero flags
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| /Documentation/ABI/stable/ |
| D | sysfs-bus-fsl-mc | 5 Description: Writing a non-zero value to this attribute will
15 Description: Writing a zero value to this attribute will
17 of the fsl-mc bus is performed. A non-zero value
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| /Documentation/arch/arm64/ |
| D | tagged-pointers.rst | 38 Using non-zero address tags in any of these locations when the
44 passing non-zero address tags to the kernel via system calls is
45 forbidden, and using a non-zero address tag for sp is strongly
48 Programs maintaining a frame pointer and frame records that use non-zero
56 When delivering signals, non-zero tags are not preserved in
73 Non-zero tags are never preserved in sigcontext.fault_address
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| /Documentation/devicetree/bindings/regulator/ |
| D | regulator.yaml | 60 disabling ramp rate, it should be explicitly initialised to zero (regulator-ramp-delay
123 hardware performs emergency shutdown. Zero can be passed to disable
130 Zero can be passed to disable error detection and value '1' indicates
136 damaged. Recovery actions should be initiated. Zero can be passed to
142 hardware performs emergency shutdown. Zero can be passed to disable
150 Zero can be passed to disable error detection and value '1' indicates
157 damaged. Recovery actions should be initiated. Zero can be passed to
164 hardware performs emergency shutdown. Zero can be passed to disable
172 Zero can be passed to disable error detection and value '1' indicates
179 it gets damaged. Recovery actions should be initiated. Zero can be passed
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| /Documentation/devicetree/bindings/cache/ |
| D | l2c2x0.yaml | 129 non-zero, disable if zero.
135 if non-zero, disable if zero.
141 if non-zero, disable if zero.
146 description: Override prefetch drop enable setting. Enable if non-zero,
147 disable if zero.
217 arm,full-line-zero-disable:
218 description: Disable the CA9 optimization Full line of zero
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| /Documentation/userspace-api/media/cec/ |
| D | cec-func-poll.rst | 45 is non-zero). CEC devices set the ``POLLIN`` and ``POLLRDNORM`` flags in
50 a value of zero, on failure it returns -1 and the ``errno`` variable is
59 non-zero ``revents`` fields, or zero if the call timed out. On error -1
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| /Documentation/devicetree/bindings/arm/bcm/ |
| D | bcm2835.yaml | 36 - raspberrypi,model-zero
37 - raspberrypi,model-zero-w
54 - raspberrypi,model-zero-2-w
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| /Documentation/arch/arm/ |
| D | kernel_user_helpers.rst | 134 r0 = success code (zero or non-zero)
144 Return zero if `*ptr` was changed or non-zero if no exchange happened.
226 r0 = success code (zero or non-zero)
236 is equal to the 64-bit value pointed by `*oldval`. Return zero if `*ptr` was
237 changed or non-zero if no exchange happened.
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| /Documentation/ABI/testing/ |
| D | sysfs-bus-peci | 6 Writing a non-zero value to this attribute will
15 Writing a non-zero value to this attribute will
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| /Documentation/filesystems/ext4/ |
| D | verity.rst | 14 - Zero-padding to the next 65536-byte boundary. This padding need not
23 - Zero-padding to the next filesystem block boundary.
29 - Zero-padding to the next offset that is 4 bytes before a filesystem
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| /Documentation/devicetree/bindings/hwmon/ |
| D | ntc-thermistor.yaml | 49 the cases when either pull-up or pull-down resistance is zero.
55 Conversely if the pull-down resistance is zero, one end of the thermistor is
102 if zero.
107 if zero.
115 zero but complex arrangements are possible.
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| /Documentation/driver-api/early-userspace/ |
| D | buffer-format.rst | 44 formats); arbitrary amounts zero bytes (for padding) can be added
72 otherwise zero
78 The c_filesize should be zero for any file which is not a regular file
88 marker; the c_filesize for an end-of-archive marker must be zero.
100 should be set to zero to indicate no data section follows. If data is
106 c_filesize must not be zero for a symlink.
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| /Documentation/devicetree/bindings/leds/ |
| D | leds-trigger-pattern.txt | 19 It will make the LED go gradually from zero-intensity to max (255) intensity in
20 1000 milliseconds, then back to zero intensity in 2000 milliseconds:
32 use zero-time lengths (the brightness must be same as the previous tuple's). So
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| /Documentation/virt/kvm/devices/ |
| D | xics.rst | 48 Zero is the highest priority, 255 means no interrupt is pending.
51 Zero is the highest priority, 255 means no IPI is pending.
54 Zero means no interrupt pending, 2 means an IPI is pending
57 Zero is the highest priority, meaning no interrupts can be
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