linux-toradex.git/arch/arc/kernel, branch v3.14.3

ARC: [cmdline] support External Device Trees from u-boot

2014-01-16T13:23:16+00:00

Signed-off-by: Vineet Gupta

ARC: [cmdline] uboot cmdline handling rework

2014-01-16T13:19:38+00:00

* Moved cmdline copy from asm to "C" - allows for more robust checking
  of pointer validity etc.

* Remove the Kconfig option to do so, base it on a runtime value passed
  by u-boot

Signed-off-by: Vineet Gupta

ARC: [SMP] optimize IPI send and receive

2013-12-23T06:35:04+00:00

* Don't send an IPI if receiver already has a pending IPI.
  Atomically piggyback the new msg with pending msg.

* IPI receiver looping on xchg() not required

References: https://lkml.org/lkml/2013/11/25/232
Suggested-by: Peter Zijlstra 
Signed-off-by: Vineet Gupta

ARC: [SMP] simplify IPI code

2013-12-23T06:35:04+00:00

* ipi_data is just a word, no need to keep it as struct

* find_next_bit() not needed to loop thru a 32bit word, ffs suffices

ARC: [SMP] cpu halt interface doesn't need "self" cpu-id

2013-12-23T06:35:04+00:00

Signed-off-by: Vineet Gupta

ARC: [SMP] IPI ACK interface doesn't need "self" cpu-id

2013-12-23T06:35:04+00:00

The interface is confusing, it feels like we are getting "sender" info,
whereas it is the "receiver", which can very well be retrived by
smp_processor_id(), if need be.

Signed-off-by: Vineet Gupta

ARC: [SMP] cpumask not needed in IPI send path

2013-12-23T06:35:04+00:00

The current IPI sending callstack needlessly involves cpumask.

   arch_send_call_function_single_ipi(cpu) / smp_send_reschedule(cpu)
      ipi_send_msg(cpumask_of(cpu))	--> [cpu to cpumask]
         plat_smp_ops.ipi_send(callmap)
            for_each_cpu(callmap)	--> [cpuask to cpu]
               do_plat_specific_ipi_PER_CPU

Given that current backends are not capable of 1:N IPIs, lets simplify
the interface for now, by keeping "a" cpu all along.

Signed-off-by: Vineet Gupta

ARC: [perf] Fix a few thinkos

2013-11-28T10:19:59+00:00

Signed-off-by: Vineet Gupta

Merge tag 'arc-v3.13-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc

2013-11-19T19:44:15+00:00

Pull second set of ARC changes from Vineet Gupta:
 - Support for Perf from Mischa
 - Enabling GPIO/Pinctrl drivers for Abilis TB10x platform
 - New defconfig for buildroot

* tag 'arc-v3.13-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
  ARC: [plat-arcfpga] Add defconfig without initramfs location
  ARC: perf: ARC 700 PMU doesn't support sampling events
  ARC: Add documentation on DT binding for ARC700 PMU
  ARC: Add perf support for ARC700 cores
  ARC: [TB10x] Updates for GPIO and pinctrl

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

2013-11-16T00:47:22+00:00

Pull trivial tree updates from Jiri Kosina:
 "Usual earth-shaking, news-breaking, rocket science pile from
  trivial.git"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (23 commits)
  doc: usb: Fix typo in Documentation/usb/gadget_configs.txt
  doc: add missing files to timers/00-INDEX
  timekeeping: Fix some trivial typos in comments
  mm: Fix some trivial typos in comments
  irq: Fix some trivial typos in comments
  NUMA: fix typos in Kconfig help text
  mm: update 00-INDEX
  doc: Documentation/DMA-attributes.txt fix typo
  DRM: comment: `halve' -> `half'
  Docs: Kconfig: `devlopers' -> `developers'
  doc: typo on word accounting in kprobes.c in mutliple architectures
  treewide: fix "usefull" typo
  treewide: fix "distingush" typo
  mm/Kconfig: Grammar s/an/a/
  kexec: Typo s/the/then/
  Documentation/kvm: Update cpuid documentation for steal time and pv eoi
  treewide: Fix common typo in "identify"
  __page_to_pfn: Fix typo in comment
  Correct some typos for word frequency
  clk: fixed-factor: Fix a trivial typo
  ...