diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/CodingStyle | 18 | ||||
| -rw-r--r-- | Documentation/block/biodoc.txt | 7 | ||||
| -rw-r--r-- | Documentation/kernel-parameters.txt | 8 | ||||
| -rw-r--r-- | Documentation/powerpc/booting-without-of.txt | 19 | ||||
| -rw-r--r-- | Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl | 8 |
5 files changed, 48 insertions, 12 deletions
diff --git a/Documentation/CodingStyle b/Documentation/CodingStyle index 0ad6dcb5d45..9069189e78e 100644 --- a/Documentation/CodingStyle +++ b/Documentation/CodingStyle @@ -682,6 +682,24 @@ result. Typical examples would be functions that return pointers; they use NULL or the ERR_PTR mechanism to report failure. + Chapter 17: Don't re-invent the kernel macros + +The header file include/linux/kernel.h contains a number of macros that +you should use, rather than explicitly coding some variant of them yourself. +For example, if you need to calculate the length of an array, take advantage +of the macro + + #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) + +Similarly, if you need to calculate the size of some structure member, use + + #define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f)) + +There are also min() and max() macros that do strict type checking if you +need them. Feel free to peruse that header file to see what else is already +defined that you shouldn't reproduce in your code. + + Appendix I: References diff --git a/Documentation/block/biodoc.txt b/Documentation/block/biodoc.txt index c6c9a9c10d7..3adaace328a 100644 --- a/Documentation/block/biodoc.txt +++ b/Documentation/block/biodoc.txt @@ -946,6 +946,13 @@ elevator_merged_fn called when a request in the scheduler has been scheduler for example, to reposition the request if its sorting order has changed. +elevator_allow_merge_fn called whenever the block layer determines + that a bio can be merged into an existing + request safely. The io scheduler may still + want to stop a merge at this point if it + results in some sort of conflict internally, + this hook allows it to do that. + elevator_dispatch_fn fills the dispatch queue with ready requests. I/O schedulers are free to postpone requests by not filling the dispatch queue unless @force diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index ef69c75780b..25d29851710 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -1714,6 +1714,14 @@ and is between 256 and 4096 characters. It is defined in the file uart6850= [HW,OSS] Format: <io>,<irq> + uhci-hcd.ignore_oc= + [USB] Ignore overcurrent events (default N). + Some badly-designed motherboards generate lots of + bogus events, for ports that aren't wired to + anything. Set this parameter to avoid log spamming. + Note that genuine overcurrent events won't be + reported either. + usbhid.mousepoll= [USBHID] The interval which mice are to be polled at. diff --git a/Documentation/powerpc/booting-without-of.txt b/Documentation/powerpc/booting-without-of.txt index b3bd36668db..33994271cb3 100644 --- a/Documentation/powerpc/booting-without-of.txt +++ b/Documentation/powerpc/booting-without-of.txt @@ -1703,29 +1703,32 @@ platforms are moved over to use the flattened-device-tree model. Required properties: - device_type : has to be "rom" - - compatible : Should specify what this ROM device is compatible with - (i.e. "onenand"). Currently, this is most likely to be "direct-mapped" - (which corresponds to the MTD physmap mapping driver). - - regs : Offset and length of the register set (or memory mapping) for + - compatible : Should specify what this flash device is compatible with. + Currently, this is most likely to be "direct-mapped" (which + corresponds to the MTD physmap mapping driver). + - reg : Offset and length of the register set (or memory mapping) for the device. + - bank-width : Width of the flash data bus in bytes. Required + for the NOR flashes (compatible == "direct-mapped" and others) ONLY. Recommended properties : - - bank-width : Width of the flash data bus in bytes. Required - for the NOR flashes (compatible == "direct-mapped" and others) ONLY. - partitions : Several pairs of 32-bit values where the first value is partition's offset from the start of the device and the second one is partition size in bytes with LSB used to signify a read only - partititon (so, the parition size should always be an even number). + partition (so, the parition size should always be an even number). - partition-names : The list of concatenated zero terminated strings representing the partition names. + - probe-type : The type of probe which should be done for the chip + (JEDEC vs CFI actually). Valid ONLY for NOR flashes. Example: flash@ff000000 { device_type = "rom"; compatible = "direct-mapped"; - regs = <ff000000 01000000>; + probe-type = "CFI"; + reg = <ff000000 01000000>; bank-width = <4>; partitions = <00000000 00f80000 00f80000 00080001>; diff --git a/Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl b/Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl index 077fbe25ebf..ccd0a953953 100644 --- a/Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl +++ b/Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl @@ -927,7 +927,7 @@ <informalexample> <programlisting> <![CDATA[ - struct mychip *chip = (struct mychip *)card->private_data; + struct mychip *chip = card->private_data; ]]> </programlisting> </informalexample> @@ -1095,7 +1095,7 @@ /* release the irq */ if (chip->irq >= 0) - free_irq(chip->irq, (void *)chip); + free_irq(chip->irq, chip); /* release the i/o ports & memory */ pci_release_regions(chip->pci); /* disable the PCI entry */ @@ -1148,7 +1148,7 @@ } chip->port = pci_resource_start(pci, 0); if (request_irq(pci->irq, snd_mychip_interrupt, - IRQF_DISABLED|IRQF_SHARED, "My Chip", chip)) { + IRQF_SHARED, "My Chip", chip)) { printk(KERN_ERR "cannot grab irq %d\n", pci->irq); snd_mychip_free(chip); return -EBUSY; @@ -1387,7 +1387,7 @@ <programlisting> <![CDATA[ if (chip->irq >= 0) - free_irq(chip->irq, (void *)chip); + free_irq(chip->irq, chip); ]]> </programlisting> </informalexample> |