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Revision c4b5fd3fb2058b650447372472ad24e2a989f9f6 authored by Linus Torvalds on 09 July 2015, 20:35:39 UTC, committed by Linus Torvalds on 09 July 2015, 20:35:39 UTC 
Merge branch 'hpfs-patches' (patches from Mikulas Patocka)
 
Merge hpfs updates from Mikulas Patocka.

Mainly fstrim support, with some minor other cleanups.

These were actually sent during the merge window, but I wanted to wait
for the FSTRIM compat handling cleanup before applying them.  Mikulas
sent that earlier today.

* emailed patches from Mikulas Patocka <mikulas@twibright.com>:
  hpfs: hpfs_error: Remove static buffer, use vsprintf extension %pV instead
  hpfs: kstrdup() out of memory handling
  hpfs: Remove unessary cast
  hpfs: add fstrim support
2 parent s 4c0a9f7 + a28e4b2
Raw File
cmdline-partition.txt 
Embedded device command line partition parsing
=====================================================================

Support for reading the block device partition table from the command line.
It is typically used for fixed block (eMMC) embedded devices.
It has no MBR, so saves storage space. Bootloader can be easily accessed
by absolute address of data on the block device.
Users can easily change the partition.

The format for the command line is just like mtdparts:

blkdevparts=<blkdev-def>[;<blkdev-def>]
  <blkdev-def> := <blkdev-id>:<partdef>[,<partdef>]
    <partdef> := <size>[@<offset>](part-name)

<blkdev-id>
    block device disk name, embedded device used fixed block device,
    it's disk name also fixed. such as: mmcblk0, mmcblk1, mmcblk0boot0.

<size>
    partition size, in bytes, such as: 512, 1m, 1G.

<offset>
    partition start address, in bytes.

(part-name)
    partition name, kernel send uevent with "PARTNAME". application can create
    a link to block device partition with the name "PARTNAME".
    user space application can access partition by partition name.

Example:
    eMMC disk name is "mmcblk0" and "mmcblk0boot0"

  bootargs:
    'blkdevparts=mmcblk0:1G(data0),1G(data1),-;mmcblk0boot0:1m(boot),-(kernel)'

  dmesg:
    mmcblk0: p1(data0) p2(data1) p3()
    mmcblk0boot0: p1(boot) p2(kernel)
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