linux-toradex.git/arch/parisc/kernel/smp.c, branch v3.9.2

parisc: Smp: remove call to ipi_call_lock()/ipi_call_unlock()

2012-06-05T15:27:12+00:00

ipi_call_lock/unlock() lock resp. unlock call_function.lock. This lock
protects only the call_function data structure itself, but it's
completely unrelated to cpu_online_mask. The mask to which the IPIs
are sent is calculated before call_function.lock is taken in
smp_call_function_many(), so the locking around set_cpu_online() is
pointless and can be removed.

[ tglx: Massaged changelog ]

Signed-off-by: Yong Zhang 
Cc: ralf@linux-mips.org
Cc: sshtylyov@mvista.com
Cc: david.daney@cavium.com
Cc: nikunj@linux.vnet.ibm.com
Cc: paulmck@linux.vnet.ibm.com
Cc: axboe@kernel.dk
Cc: peterz@infradead.org
Cc: James E.J. Bottomley 
Cc: Helge Deller 
Cc: linux-parisc@vger.kernel.org
Link: http://lkml.kernel.org/r/1338275765-3217-4-git-send-email-yong.zhang0@gmail.com
Acked-by: Srivatsa S. Bhat 
Acked-by: Peter Zijlstra 
Signed-off-by: Thomas Gleixner

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

2012-05-22T02:43:57+00:00

Pull smp hotplug cleanups from Thomas Gleixner:
 "This series is merily a cleanup of code copied around in arch/* and
  not changing any of the real cpu hotplug horrors yet.  I wish I'd had
  something more substantial for 3.5, but I underestimated the lurking
  horror..."

Fix up trivial conflicts in arch/{arm,sparc,x86}/Kconfig and
arch/sparc/include/asm/thread_info_32.h

* 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (79 commits)
  um: Remove leftover declaration of alloc_task_struct_node()
  task_allocator: Use config switches instead of magic defines
  sparc: Use common threadinfo allocator
  score: Use common threadinfo allocator
  sh-use-common-threadinfo-allocator
  mn10300: Use common threadinfo allocator
  powerpc: Use common threadinfo allocator
  mips: Use common threadinfo allocator
  hexagon: Use common threadinfo allocator
  m32r: Use common threadinfo allocator
  frv: Use common threadinfo allocator
  cris: Use common threadinfo allocator
  x86: Use common threadinfo allocator
  c6x: Use common threadinfo allocator
  fork: Provide kmemcache based thread_info allocator
  tile: Use common threadinfo allocator
  fork: Provide weak arch_release_[task_struct|thread_info] functions
  fork: Move thread info gfp flags to header
  fork: Remove the weak insanity
  sh: Remove cpu_idle_wait()
  ...

parisc/CPU hotplug: Add missing call to notify_cpu_starting()

2012-05-16T01:16:57+00:00

The scheduler depends on receiving the CPU_STARTING notification, without
which we end up into a lot of trouble. So add the missing call to
notify_cpu_starting() in the bringup code.

Signed-off-by: Srivatsa S. Bhat 
Acked-and-Tested-by: Mikulas Patocka 
Acked-and-Tested-by: Tobias Ulmer 
Tested-by: John David Anglin 
Signed-off-by: Linus Torvalds

parisc: Use generic idle thread allocation

2012-04-26T10:06:13+00:00

Signed-off-by: Thomas Gleixner 
Cc: Peter Zijlstra 
Cc: Rusty Russell 
Cc: Paul E. McKenney 
Cc: Srivatsa S. Bhat 
Cc: James E.J. Bottomley 
Link: http://lkml.kernel.org/r/20120420124557.988947805@linutronix.de

smp: Add task_struct argument to __cpu_up()

2012-04-26T10:06:09+00:00

Preparatory patch to make the idle thread allocation for secondary
cpus generic.

Signed-off-by: Thomas Gleixner 
Cc: Peter Zijlstra 
Cc: Rusty Russell 
Cc: Paul E. McKenney 
Cc: Srivatsa S. Bhat 
Cc: Matt Turner 
Cc: Russell King 
Cc: Mike Frysinger 
Cc: Jesper Nilsson 
Cc: Richard Kuo 
Cc: Tony Luck 
Cc: Hirokazu Takata 
Cc: Ralf Baechle 
Cc: David Howells 
Cc: James E.J. Bottomley 
Cc: Benjamin Herrenschmidt 
Cc: Martin Schwidefsky 
Cc: Paul Mundt 
Cc: David S. Miller 
Cc: Chris Metcalf 
Cc: Richard Weinberger 
Cc: x86@kernel.org
Link: http://lkml.kernel.org/r/20120420124556.964170564@linutronix.de

Merge tag 'parisc-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/parisc-2.6

2012-03-31T20:32:30+00:00

Pull PARISC misc updates from James Bottomley:
 "This is a couple of minor updates (fixing lws futex locking and
  removing some obsolete cpu_*_map calls)."

* tag 'parisc-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/parisc-2.6:
  [PARISC] remove references to cpu_*_map.
  [PARISC] futex: Use same lock set as lws calls

Disintegrate asm/system.h for PA-RISC

2012-03-28T17:30:02+00:00

Disintegrate asm/system.h for PA-RISC.

Signed-off-by: David Howells 
cc: linux-parisc@vger.kernel.org

[PARISC] remove references to cpu_*_map.

2012-02-27T15:39:16+00:00

This has been obsolescent for a while; time for the final push.

Signed-off-by: Rusty Russell 
Signed-off-by: James Bottomley

atomic: use

2011-07-26T23:49:47+00:00

This allows us to move duplicated code in 
(atomic_inc_not_zero() for now) to 

Signed-off-by: Arun Sharma 
Reviewed-by: Eric Dumazet 
Cc: Ingo Molnar 
Cc: David Miller 
Cc: Eric Dumazet 
Acked-by: Mike Frysinger 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

sched: Provide scheduler_ipi() callback in response to smp_send_reschedule()

2011-04-14T06:52:32+00:00

For future rework of try_to_wake_up() we'd like to push part of that
function onto the CPU the task is actually going to run on.

In order to do so we need a generic callback from the existing scheduler IPI.

This patch introduces such a generic callback: scheduler_ipi() and
implements it as a NOP.

BenH notes: PowerPC might use this IPI on offline CPUs under rare conditions!

Acked-by: Russell King 
Acked-by: Martin Schwidefsky 
Acked-by: Chris Metcalf 
Acked-by: Jesper Nilsson 
Acked-by: Benjamin Herrenschmidt 
Signed-off-by: Ralf Baechle 
Reviewed-by: Frank Rowand 
Cc: Mike Galbraith 
Cc: Nick Piggin 
Cc: Linus Torvalds 
Cc: Andrew Morton 
Signed-off-by: Ingo Molnar 
Signed-off-by: Peter Zijlstra 
Link: http://lkml.kernel.org/r/20110405152728.744338123@chello.nl