linux-stable.git/arch/arm/kernel/smp.c, branch linux-3.1.y

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

Merge branches 'btc', 'dma', 'entry', 'fixes', 'linker-layout', 'misc', 'mmci', 'suspend' and 'vfp' into for-next

2011-07-22T22:08:48+00:00

ARM: 6993/1: platsmp: Allow secondary cpu hotplug with maxcpus=1

2011-07-07T13:45:07+00:00

If an ARM system has multiple cpus in the same socket and the
kernel is booted with maxcpus=1, secondary cpus are possible but
not present due to how platform_smp_prepare_cpus() is called.
Since most typical ARM processors don't actually support physical
hotplug, initialize the present map to be equal to the possible
map in generic ARM SMP code. Also, always call
platform_smp_prepare_cpus() as long as max_cpus is non-zero (0
means no SMP) to allow platform code to do any SMP setup.

After applying this patch it's possible to boot an ARM system
with maxcpus=1 on the command line and then hotplug in secondary
cpus via sysfs. This is more in line with how x86 does things.

Signed-off-by: Stephen Boyd 
Cc: Paul Mundt 
Cc: Kukjin Kim 
Cc: David Brown 
Cc: Tony Lindgren 
Cc: Srinidhi Kasagar 
Cc: Linus Walleij 
Signed-off-by: Russell King

ARM: SMP: wait for CPU to be marked active

2011-06-21T10:09:05+00:00

When we bring a CPU online, we should wait for it to become active
before entering the idle thread, so we know that the scheduler and
thread migration is going to work.

Signed-off-by: Russell King

ARM: 6942/1: mm: make TTBR1 always point to swapper_pg_dir on ARMv6/7

2011-05-26T11:14:32+00:00

This patch makes TTBR1 point to swapper_pg_dir so that global, kernel
mappings can be used exclusively on v6 and v7 cores where they are
needed.

Signed-off-by: Catalin Marinas 
Signed-off-by: Will Deacon 
Signed-off-by: Russell King

Merge branches 'consolidate-clksrc', 'consolidate-flash', 'consolidate-generic', 'consolidate-smp', 'consolidate-stmp' and 'consolidate-zones' into consolidate

2011-05-23T17:05:10+00:00

ARM: consolidate SMP cross call implementation

2011-05-23T15:53:17+00:00

Rather than having each platform class provide a mach/smp.h header for
smp_cross_call(), arrange for them to register the function with the
core ARM SMP code instead.

Signed-off-by: Russell King

Merge commit 'v2.6.39-rc7' into sched/core

2011-05-12T07:36:18+00:00

ARM: 6887/1: Mark broadcast_timer_setup() __cpuinit

2011-04-27T21:02:47+00:00

This function is only called by percpu_timer_setup() which is
also __cpuinit marked. Thus it's safe to mark this function as
__cpuinit as well.

Signed-off-by: Stephen Boyd 
Signed-off-by: Russell King

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