linux-stable.git/arch/s390/include/asm, branch linux-3.13.y

s390/compat: fix PSW32_USER_BITS definition

2014-02-06T19:34:00+00:00

commit 075dfd82102d2048e43e1cbf48d558d915c50072 upstream.

PSW32_USER_BITS should define the primary address space for user space
instead of the home address space.
Symptom of this bug is that gdb doesn't work in compat mode.

The bug was introduced with e258d719ff28 "s390/uaccess: always run the kernel
in home space" and f26946d7ecad "s390/compat: make psw32_user_bits a constant
value again".

Reported-by: Andreas Arnez 
Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky 
Signed-off-by: Greg Kroah-Hartman

s390/smp: improve setup of possible cpu mask

2013-12-18T16:35:18+00:00

Since under z/VM we cannot have more than 64 cpus, make sure the
cpu_possible_mask does not contain more bits.
This avoids wasting memory for dynamic per-cpu allocations if
CONFIG_NR_CPUS is larger than 64.

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

s390/smp,sclp: fix size of sclp_cpu_info structure

2013-12-02T14:31:08+00:00

struct sclp_cpu_info contains entries only for 255 cpus, while the new
smp fallback sigp detection code will fill up to 256 entries.
Even though there is no machine available which has 256 cpus and where
in addition the fallback sigp cpu detection code will be used we better
fix this, to prevent out of bound accesses.

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

s390/time,vdso: convert to the new update_vsyscall interface

2013-11-25T08:15:39+00:00

Switch to the improved update_vsyscall interface that provides
sub-nanosecond precision for gettimeofday and clock_gettime.

Signed-off-by: Martin Schwidefsky

s390/mm: optimize copy_page

2013-11-20T08:04:55+00:00

Always use the mvcl instruction to copy a page instead of mvpg or a
couple of mvc instructions.
Copying a huge page is 25% faster this way. Also bypass caches when
copying pages since only parts of a page will be used afterwards.
Especially when copying a huge page this would kick everything out
of the L1 and L2 data caches on a zEC12 machine.

Signed-off-by: Heiko Carstens

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

2013-11-19T19:43:21+00:00

Pull second set of s390 patches from Martin Schwidefsky:
 "The handling of the PCI hotplug notifications has been improved, the
  zfcp dumper can now detect the HSA size dynamically and the default
  install kernel has been changed to the compressed bzImage.  And two
  bug-fixes for scm and 3720"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/pci: implement hotplug notifications
  s390/scm_block: do not hide eadm subchannel dependency
  s390/sclp: Consolidate early sclp init calls to sclp_early_detect()
  s390/sclp: Move early code from sclp_cmd.c to sclp_early.c
  s390/sclp: Determine HSA size dynamically for zfcpdump
  s390/sclp: Move declarations for sclp_sdias into separate header file
  s390/pci: implement pcibios_remove_bus
  s390/pci: improve handling of bus resources
  s390/3270: fix missing device_destroy() call
  s390/boot: Install bzImage as default kernel image

Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2013-11-19T18:40:00+00:00

Pull irq cleanups from Ingo Molnar:
 "This is a multi-arch cleanup series from Thomas Gleixner, which we
  kept to near the end of the merge window, to not interfere with
  architecture updates.

  This series (motivated by the -rt kernel) unifies more aspects of IRQ
  handling and generalizes PREEMPT_ACTIVE"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  preempt: Make PREEMPT_ACTIVE generic
  sparc: Use preempt_schedule_irq
  ia64: Use preempt_schedule_irq
  m32r: Use preempt_schedule_irq
  hardirq: Make hardirq bits generic
  m68k: Simplify low level interrupt handling code
  genirq: Prevent spurious detection for unconditionally polled interrupts

s390/scm_block: do not hide eadm subchannel dependency

2013-11-15T13:08:42+00:00

Stop hiding scm_block's dependency to the eadm subchannel driver
(by using functions provided by the eadm subchannel instead of
wrappers provided by the scm bus).

This will help userspace recognizing module dependencies (e.g. for
building a ramdisk). As a side effect we can get rid of some code
reimplementing refcounting between those modules.

Reported-by: Hendrik Brueckner 
Reviewed-by: Peter Oberparleiter 
Signed-off-by: Sebastian Ott 
Signed-off-by: Martin Schwidefsky

s390/sclp: Consolidate early sclp init calls to sclp_early_detect()

2013-11-15T13:08:41+00:00

The new function calls the old ones. The sclp_event_mask_early() is removed
and replaced by one invocation of sclp_set_event_mask(0, 0).

Reviewed-by: Heiko Carstens 
Signed-off-by: Michael Holzheu 
Signed-off-by: Martin Schwidefsky

s390/sclp: Move early code from sclp_cmd.c to sclp_early.c

2013-11-15T13:08:41+00:00

The early SCLP driver code in sclp_cmd.c belongs to sclp_early.c
because it is independent from the 'normal' SCLP driver. So move
it to sclp_early.c

Reviewed-by: Heiko Carstens 
Signed-off-by: Michael Holzheu 
Signed-off-by: Martin Schwidefsky