linux-stable.git/arch/score, branch v3.18.76

Make asm/word-at-a-time.h available on all architectures

2017-08-11T16:30:13+00:00

commit a6e2f029ae34f41adb6ae3812c32c5d326e1abd2 upstream.

Added the x86 implementation of word-at-a-time to the
generic version, which previously only supported big-endian.

Omitted the x86-specific load_unaligned_zeropad(), which in
any case is also not present for the existing BE-only
implementation of a word-at-a-time, and is only used under
CONFIG_DCACHE_WORD_ACCESS.

Added as a "generic-y" to the Kbuilds of all architectures
that didn't previously have it.

Signed-off-by: Chris Metcalf 
Signed-off-by: Greg Kroah-Hartman

score: fix copy_from_user() and friends

2016-10-06T02:40:20+00:00

[ Upstream commit b615e3c74621e06cd97f86373ca90d43d6d998aa ]

Cc: stable@vger.kernel.org
Signed-off-by: Al Viro 
Signed-off-by: Sasha Levin

score: fix __get_user/get_user

2016-10-06T02:40:20+00:00

[ Upstream commit c2f18fa4cbb3ad92e033a24efa27583978ce9600 ]

* should zero on any failure
* __get_user() should use __copy_from_user(), not copy_from_user()

Cc: stable@vger.kernel.org
Signed-off-by: Al Viro 
Signed-off-by: Sasha Levin

vm: add VM_FAULT_SIGSEGV handling support

2015-02-06T06:36:01+00:00

commit 33692f27597fcab536d7cbbcc8f52905133e4aa7 upstream.

The core VM already knows about VM_FAULT_SIGBUS, but cannot return a
"you should SIGSEGV" error, because the SIGSEGV case was generally
handled by the caller - usually the architecture fault handler.

That results in lots of duplication - all the architecture fault
handlers end up doing very similar "look up vma, check permissions, do
retries etc" - but it generally works.  However, there are cases where
the VM actually wants to SIGSEGV, and applications _expect_ SIGSEGV.

In particular, when accessing the stack guard page, libsigsegv expects a
SIGSEGV.  And it usually got one, because the stack growth is handled by
that duplicated architecture fault handler.

However, when the generic VM layer started propagating the error return
from the stack expansion in commit fee7e49d4514 ("mm: propagate error
from stack expansion even for guard page"), that now exposed the
existing VM_FAULT_SIGBUS result to user space.  And user space really
expected SIGSEGV, not SIGBUS.

To fix that case, we need to add a VM_FAULT_SIGSEGV, and teach all those
duplicate architecture fault handlers about it.  They all already have
the code to handle SIGSEGV, so it's about just tying that new return
value to the existing code, but it's all a bit annoying.

This is the mindless minimal patch to do this.  A more extensive patch
would be to try to gather up the mostly shared fault handling logic into
one generic helper routine, and long-term we really should do that
cleanup.

Just from this patch, you can generally see that most architectures just
copied (directly or indirectly) the old x86 way of doing things, but in
the meantime that original x86 model has been improved to hold the VM
semaphore for shorter times etc and to handle VM_FAULT_RETRY and other
"newer" things, so it would be a good idea to bring all those
improvements to the generic case and teach other architectures about
them too.

Reported-and-tested-by: Takashi Iwai 
Tested-by: Jan Engelhardt 
Acked-by: Heiko Carstens  # "s390 still compiles and boots"
Cc: linux-arch@vger.kernel.org
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman

score: use Kbuild logic to include

2014-10-10T02:25:46+00:00

Signed-off-by: Geert Uytterhoeven 
Acked-by: Lennox Wu 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

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

2014-10-09T10:30:57+00:00

Pull timer fixes from Ingo Molnar:
 "Main changes:

  - Fix the deadlock reported by Dave Jones et al
  - Clean up and fix nohz_full interaction with arch abilities
  - nohz init code consolidation/cleanup"

* 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  nohz: nohz full depends on irq work self IPI support
  nohz: Consolidate nohz full init code
  arm64: Tell irq work about self IPI support
  arm: Tell irq work about self IPI support
  x86: Tell irq work about self IPI support
  irq_work: Force raised irq work to run on irq work interrupt
  irq_work: Introduce arch_irq_work_has_interrupt()
  nohz: Move nohz full init call to tick init

score: Remove GENERIC_HAS_IOMAP

2014-10-04T20:38:08+00:00

The symbol is an orphan, get rid of it.

Signed-off-by: Richard Weinberger 
Acked-by: Lennox Wu 
Cc: Paul Bolle 
[Guenter Roeck: Merge with 3.17-rc3; update headline]
Signed-off-by: Guenter Roeck

arch/score/include/asm/Kbuild: Add generic "serial.h"

2014-10-04T17:18:17+00:00

The related error (with allmodconfig under score):

    CC [M]  drivers/staging/speakup/speakup_acntpc.o
  In file included from drivers/staging/speakup/speakup_acntpc.c:33:0:
  drivers/staging/speakup/serialio.h:7:24: fatal error: asm/serial.h: No such file or directory
   #include 
                          ^
  compilation terminated.
  make[3]: *** [drivers/staging/speakup/speakup_acntpc.o] Error 1
  make[2]: *** [drivers/staging/speakup] Error 2
  make[1]: *** [drivers/staging] Error 2
  make: *** [drivers] Error 2

Acked-by: Lennox Wu 
Signed-off-by: Chen Gang

score: remove deprecated IRQF_DISABLED

2014-10-04T17:18:17+00:00

This patch removes the use of the IRQF_DISABLED flag
from arch/score/kernel/time.c

It's a NOOP since 2.6.35 and it will be removed one day.

Signed-off-by: Michael Opdenacker 
Acked-by: Lennox Wu

arch/score/mm/cache.c: Export 'flush_icache_range'

2014-10-04T17:18:17+00:00

The related error (with allmodconfig under score):

    MODPOST 1365 modules
  ERROR: "flush_icache_range" [drivers/misc/lkdtm.ko] undefined!

Acked-by: Lennox Wu 
Signed-off-by: Chen Gang