linux-toradex.git/drivers/s390/char, branch v3.12

s390/time: correct use of store clock fast

2013-10-22T07:16:40+00:00

The result of the store-clock-fast (STCKF) instruction is a bit fuzzy.
It can happen that the value stored on one CPU is smaller than the value
stored on another CPU, although the order of the stores is the other
way around. This can cause deltas of get_tod_clock() values to become
negative when they should not be.

We need to be more careful with store-clock-fast, this patch partially
reverts git commit e4b7b4238e666682555461fa52eecd74652f36bb "time:
always use stckf instead of stck if available". The get_tod_clock()
function now uses the store-clock-extended (STCKE) instruction.
get_tod_clock_fast() can be used if the fuzziness of store-clock-fast
is acceptable e.g. for wait loops local to a CPU.

Signed-off-by: Martin Schwidefsky

s390/vmlogrdr: fix array access in vmlogrdr_open()

2013-10-15T11:47:59+00:00

Fix check within vmlogrdr_open() if the minor address is not larger
than the number of array elements.

Found with "smatch":

drivers/s390/char/vmlogrdr.c:318 vmlogrdr_open() warn:
  buffer overflow 'sys_ser' 3 <= 3

Acked-by: Stefan Weinhuber 
Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

s390/sclp: properly detect line mode console

2013-09-30T11:04:39+00:00

To detect a line mode console we need a message event type
for the receive mask and a command event type for the send mask.
Checking for a MSG event in the sclp send mask was wrong and
might result in line mode consoles not being detected.

Signed-off-by: Christian Borntraeger 
Signed-off-by: Martin Schwidefsky

s390/3270: fix return value check in tty3270_resize_work()

2013-09-30T11:04:38+00:00

In case of error, the function tty3270_alloc_screen() returns ERR_PTR()
and never returns NULL. The NULL test in the return value check should
be replaced with IS_ERR().

Signed-off-by: Wei Yongjun 
Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

s390/vmcore: use vmcore for zfcpdump

2013-09-11T22:59:15+00:00

Modify the s390 copy_oldmem_page() and remap_oldmem_pfn_range() function
for zfcpdump to read from the HSA memory if memory below HSA_SIZE bytes is
requested.  Otherwise real memory is used.

Signed-off-by: Michael Holzheu 
Cc: HATAYAMA Daisuke 
Cc: Jan Willeke 
Cc: Vivek Goyal 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

s390: make various functions static, add declarations to header files

2013-09-07T09:58:03+00:00

Make various functions static, add declarations to header files to
fix a couple of sparse findings.

Signed-off-by: Heiko Carstens

s390/irq: rework irq subclass handling

2013-09-04T15:19:13+00:00

Let's not add a function for every external interrupt subclass for
which we need reference counting. Just have two register/unregister
functions which have a subclass parameter:

void irq_subclass_register(enum irq_subclass subclass);
void irq_subclass_unregister(enum irq_subclass subclass);

Signed-off-by: Heiko Carstens

s390/sclp: reword cpu capability change message

2013-08-22T10:20:07+00:00

Change wording for the cpu capabiity changed message:
If such an event occurs it only means that a cpu capability *may* have
changed. A cpu capability change event may also occur for other reasons.

Also change the severity of the message from warning to informational.

If such an event happens user space should into /proc/sysinfo and verify
if some capability values changed, if that is of interest.

Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial

2013-07-04T18:40:58+00:00

Pull trivial tree updates from Jiri Kosina:
 "The usual stuff from trivial tree"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (34 commits)
  treewide: relase -> release
  Documentation/cgroups/memory.txt: fix stat file documentation
  sysctl/net.txt: delete reference to obsolete 2.4.x kernel
  spinlock_api_smp.h: fix preprocessor comments
  treewide: Fix typo in printk
  doc: device tree: clarify stuff in usage-model.txt.
  open firmware: "/aliasas" -> "/aliases"
  md: bcache: Fixed a typo with the word 'arithmetic'
  irq/generic-chip: fix a few kernel-doc entries
  frv: Convert use of typedef ctl_table to struct ctl_table
  sgi: xpc: Convert use of typedef ctl_table to struct ctl_table
  doc: clk: Fix incorrect wording
  Documentation/arm/IXP4xx fix a typo
  Documentation/networking/ieee802154 fix a typo
  Documentation/DocBook/media/v4l fix a typo
  Documentation/video4linux/si476x.txt fix a typo
  Documentation/virtual/kvm/api.txt fix a typo
  Documentation/early-userspace/README fix a typo
  Documentation/video4linux/soc-camera.txt fix a typo
  lguest: fix CONFIG_PAE -> CONFIG_x86_PAE in comment
  ...

treewide: relase -> release

2013-06-28T12:34:33+00:00

Signed-off-by: Geert Uytterhoeven 
Signed-off-by: Jiri Kosina