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  1. 09 Jan, 2012 3 commits
  3. 09 Dec, 2011 1 commit
    • Magnus Damm's avatar
      sh: pfc: ioremap() support · b0e10211
      Magnus Damm authored 
      Add support for non-entity mapped PFC registers through
the use of struct resource and ioremap()/iounmap().

The PFC main data structure gets updated with a pointer
to a struct resources array that point out all register
windows used by the PFC instance. The register definitions
are kept as physical addresses but the PFC code will do
transparent conversion into virtual addresses whenever
register windows are specified using with struct resource.

To introduce as little performance penalty as possible the
virtual address of each data register is cached in memory.
The virtual address of each configuration register is however
calculated during run time. This because the configuration
is considered slow path so focus is instead put on keeping
memory foot print as small as possible.

The PFC register access  code is in this patch updated from
__raw_readN() / __raw_writeN() into ioreadN() / iowriteN().

This patch is needed to support the PFC block in r8a7779.
Signed-off-by: default avatarMagnus Damm <damm@opensource.se>
Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
      b0e10211
  5. 29 Nov, 2011 3 commits
  7. 28 Nov, 2011 11 commits
  9. 27 Nov, 2011 5 commits
  11. 26 Nov, 2011 5 commits
  13. 25 Nov, 2011 2 commits
    • Lars-Peter Clausen's avatar
      hwmon: Remove redundant spi driver bus initialization · b52fabca
      Lars-Peter Clausen authored 
      In ancient times it was necessary to manually initialize the bus field of an
spi_driver to spi_bus_type. These days this is done in spi_register_driver(),
so we can drop the manual assignment.

The patch was generated using the following coccinelle semantic patch:
// <smpl>
@@
identifier _driver;
@@
struct spi_driver _driver = {
	.driver = {
-		.bus = &spi_bus_type,
	},
};
// </smpl>
Signed-off-by: default avatarLars-Peter Clausen <lars@metafoo.de>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: Guenter Roeck <guenter.roeck@ericsson.com>
Cc: lm-sensors@lm-sensors.org
Signed-off-by: default avatarGuenter Roeck <guenter.roeck@ericsson.com>
      b52fabca
    • Tejun Heo's avatar
      ext4: fix racy use-after-free in ext4_end_io_dio() · 4c81f045
      Tejun Heo authored 
      ext4_end_io_dio() queues io_end->work and then clears iocb->private;
however, io_end->work calls aio_complete() which frees the iocb
object.  If that slab object gets reallocated, then ext4_end_io_dio()
can end up clearing someone else's iocb->private, this use-after-free
can cause a leak of a struct ext4_io_end_t structure.

Detected and tested with slab poisoning.

[ Note: Can also reproduce using 12 fio's against 12 file systems with the
  following configuration file:

  [global]
  direct=1
  ioengine=libaio
  iodepth=1
  bs=4k
  ba=4k
  size=128m

  [create]
  filename=${TESTDIR}
  rw=write

  -- tytso ]

Google-Bug-Id: 5354697
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
Signed-off-by: default avatar"Theodore Ts'o" <tytso@mit.edu>
Reported-by: default avatarKent Overstreet <koverstreet@google.com>
Tested-by: default avatarKent Overstreet <koverstreet@google.com>
Cc: stable@kernel.org
      4c81f045
  15. 24 Nov, 2011 10 commits
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