linux/drivers/usb
Linus Torvalds 7a932516f5 vfs/y2038: inode timestamps conversion to timespec64
This is a late set of changes from Deepa Dinamani doing an automated
 treewide conversion of the inode and iattr structures from 'timespec'
 to 'timespec64', to push the conversion from the VFS layer into the
 individual file systems.
 
 There were no conflicts between this and the contents of linux-next
 until just before the merge window, when we saw multiple problems:
 
 - A minor conflict with my own y2038 fixes, which I could address
   by adding another patch on top here.
 - One semantic conflict with late changes to the NFS tree. I addressed
   this by merging Deepa's original branch on top of the changes that
   now got merged into mainline and making sure the merge commit includes
   the necessary changes as produced by coccinelle.
 - A trivial conflict against the removal of staging/lustre.
 - Multiple conflicts against the VFS changes in the overlayfs tree.
   These are still part of linux-next, but apparently this is no longer
   intended for 4.18 [1], so I am ignoring that part.
 
 As Deepa writes:
 
   The series aims to switch vfs timestamps to use struct timespec64.
   Currently vfs uses struct timespec, which is not y2038 safe.
 
   The series involves the following:
   1. Add vfs helper functions for supporting struct timepec64 timestamps.
   2. Cast prints of vfs timestamps to avoid warnings after the switch.
   3. Simplify code using vfs timestamps so that the actual
      replacement becomes easy.
   4. Convert vfs timestamps to use struct timespec64 using a script.
      This is a flag day patch.
 
   Next steps:
   1. Convert APIs that can handle timespec64, instead of converting
      timestamps at the boundaries.
   2. Update internal data structures to avoid timestamp conversions.
 
 Thomas Gleixner adds:
 
   I think there is no point to drag that out for the next merge window.
   The whole thing needs to be done in one go for the core changes which
   means that you're going to play that catchup game forever. Let's get
   over with it towards the end of the merge window.
 
 [1] https://www.spinics.net/lists/linux-fsdevel/msg128294.html
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Merge tag 'vfs-timespec64' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground

Pull inode timestamps conversion to timespec64 from Arnd Bergmann:
 "This is a late set of changes from Deepa Dinamani doing an automated
  treewide conversion of the inode and iattr structures from 'timespec'
  to 'timespec64', to push the conversion from the VFS layer into the
  individual file systems.

  As Deepa writes:

   'The series aims to switch vfs timestamps to use struct timespec64.
    Currently vfs uses struct timespec, which is not y2038 safe.

    The series involves the following:
    1. Add vfs helper functions for supporting struct timepec64
       timestamps.
    2. Cast prints of vfs timestamps to avoid warnings after the switch.
    3. Simplify code using vfs timestamps so that the actual replacement
       becomes easy.
    4. Convert vfs timestamps to use struct timespec64 using a script.
       This is a flag day patch.

    Next steps:
    1. Convert APIs that can handle timespec64, instead of converting
       timestamps at the boundaries.
    2. Update internal data structures to avoid timestamp conversions'

  Thomas Gleixner adds:

   'I think there is no point to drag that out for the next merge
    window. The whole thing needs to be done in one go for the core
    changes which means that you're going to play that catchup game
    forever. Let's get over with it towards the end of the merge window'"

* tag 'vfs-timespec64' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground:
  pstore: Remove bogus format string definition
  vfs: change inode times to use struct timespec64
  pstore: Convert internal records to timespec64
  udf: Simplify calls to udf_disk_stamp_to_time
  fs: nfs: get rid of memcpys for inode times
  ceph: make inode time prints to be long long
  lustre: Use long long type to print inode time
  fs: add timespec64_truncate()
2018-06-15 07:31:07 +09:00
..
atm USB: atm: fix up some remaining DEVICE_ATTR() usage 2018-01-24 08:49:52 +01:00
c67x00 USB: add SPDX identifiers to all remaining Makefiles 2017-11-07 15:53:48 +01:00
chipidea USB: chipidea: no need to check return value of debugfs_create functions 2018-05-31 12:54:22 +02:00
class usb: usbtmc: Remove rigol_quirk 2018-05-18 15:56:40 +02:00
common usb: common: Small class for USB role switches 2018-03-22 13:40:10 +01:00
core treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
dwc2 treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
dwc3 USB: dwc3: no need to check return value of debugfs_create functions 2018-05-31 12:54:22 +02:00
early usb: early: Correct the endpoint type value for bulk in endpoint 2017-12-07 16:03:15 +01:00
gadget vfs/y2038: inode timestamps conversion to timespec64 2018-06-15 07:31:07 +09:00
host treewide: kzalloc_node() -> kcalloc_node() 2018-06-12 16:19:22 -07:00
image USB/PHY patches for 4.15-rc1 2017-11-13 21:14:07 -08:00
isp1760 usb: isp1760: Replace mdelay with msleep in isp1760_stop 2018-04-22 15:49:42 +02:00
misc treewide: Use array_size() in vmalloc() 2018-06-12 16:19:22 -07:00
mon treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
mtu3 USB: mtu3: no need to check return value of debugfs_create_dir() 2018-05-31 12:54:21 +02:00
musb USB: musb: clean up debugfs file and directory creation 2018-05-31 12:54:21 +02:00
phy phy: tegra: select USB_COMMON 2018-05-31 12:50:40 +02:00
renesas_usbhs treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
roles usb: roles: intel_xhci: Enable runtime PM 2018-05-24 18:17:00 +02:00
serial treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
storage treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
typec USB: typec: fsusb302: no need to check return value of debugfs_create_dir() 2018-05-31 16:03:59 +02:00
usbip usbip: vhci_sysfs: fix potential Spectre v1 2018-05-24 18:14:28 +02:00
wusbcore treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
Kconfig usb: select USB_COMMON for usb role switch config 2018-04-22 15:23:37 +02:00
Makefile usb: roles: Add Intel xHCI USB role switch driver 2018-03-22 13:49:27 +01:00
README
usb-skeleton.c usb: usb-skeleton: make MODULE_LICENSE and SPDX tag match 2018-03-06 09:42:07 -08:00

To understand all the Linux-USB framework, you'll use these resources:

    * This source code.  This is necessarily an evolving work, and
      includes kerneldoc that should help you get a current overview.
      ("make pdfdocs", and then look at "usb.pdf" for host side and
      "gadget.pdf" for peripheral side.)  Also, Documentation/usb has
      more information.

    * The USB 2.0 specification (from www.usb.org), with supplements
      such as those for USB OTG and the various device classes.
      The USB specification has a good overview chapter, and USB
      peripherals conform to the widely known "Chapter 9".

    * Chip specifications for USB controllers.  Examples include
      host controllers (on PCs, servers, and more); peripheral
      controllers (in devices with Linux firmware, like printers or
      cell phones); and hard-wired peripherals like Ethernet adapters.

    * Specifications for other protocols implemented by USB peripheral
      functions.  Some are vendor-specific; others are vendor-neutral
      but just standardized outside of the www.usb.org team.

Here is a list of what each subdirectory here is, and what is contained in
them.

core/		- This is for the core USB host code, including the
		  usbfs files and the hub class driver ("hub_wq").

host/		- This is for USB host controller drivers.  This
		  includes UHCI, OHCI, EHCI, and others that might
		  be used with more specialized "embedded" systems.

gadget/		- This is for USB peripheral controller drivers and
		  the various gadget drivers which talk to them.


Individual USB driver directories.  A new driver should be added to the
first subdirectory in the list below that it fits into.

image/		- This is for still image drivers, like scanners or
		  digital cameras.
../input/	- This is for any driver that uses the input subsystem,
		  like keyboard, mice, touchscreens, tablets, etc.
../media/	- This is for multimedia drivers, like video cameras,
		  radios, and any other drivers that talk to the v4l
		  subsystem.
../net/		- This is for network drivers.
serial/		- This is for USB to serial drivers.
storage/	- This is for USB mass-storage drivers.
class/		- This is for all USB device drivers that do not fit
		  into any of the above categories, and work for a range
		  of USB Class specified devices. 
misc/		- This is for all USB device drivers that do not fit
		  into any of the above categories.