linux-toradex.git/arch/mips/include/asm/mach-ip27, branch v3.2.31

MIPS: Remove pointless return statement from empty void functions.

2011-07-25T16:26:55+00:00

Signed-off-by: Ralf Baechle 
To: Sergei Shtylyov 
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2391/
Signed-off-by: Ralf Baechle

MIPS: Convert DMA to use dma-mapping-common.h

2010-10-29T18:08:31+00:00

Use asm-generic/dma-mapping-common.h to handle all DMA mapping operations
and establish a default get_dma_ops() that forwards all operations to the
existing code.

Augment dev_archdata to carry a pointer to the struct dma_map_ops, allowing
DMA operations to be overridden on a per device basis.  Currently this is
never filled in, so the default dma_map_ops are used.  A follow-on patch
sets this for Octeon PCI devices.

Also initialize the dma_debug system as it is now used if it is configured.

Includes fixes by Kevin Cernekee .

Signed-off-by: David Daney 
Patchwork: http://patchwork.linux-mips.org/patch/1637/
Patchwork: http://patchwork.linux-mips.org/patch/1678/
Signed-off-by: Ralf Baechle

MIPS: ip32, ip27, jazz: Make static functions in dma-coherence.h inline.

2010-10-29T18:08:30+00:00

Any function defined in a header file should be inline.  This helps us
avoid 'unused' compiler warnings when we include the files in more
places in subsequent patches.

Signed-off-by: David Daney 
Patchwork: http://patchwork.linux-mips.org/patch/1636/
Signed-off-by: Ralf Baechle

dma-mapping: rename ARCH_KMALLOC_MINALIGN to ARCH_DMA_MINALIGN

2010-08-11T15:59:21+00:00

Now each architecture has the own dma_get_cache_alignment implementation.

dma_get_cache_alignment returns the minimum DMA alignment.  Architectures
define it as ARCH_KMALLOC_MINALIGN (it's used to make sure that malloc'ed
buffer is DMA-safe; the buffer doesn't share a cache with the others).  So
we can unify dma_get_cache_alignment implementations.

This patch:

dma_get_cache_alignment() needs to know if an architecture defines
ARCH_KMALLOC_MINALIGN or not (needs to know if architecture has DMA
alignment restriction).  However, slab.h define ARCH_KMALLOC_MINALIGN if
architectures doesn't define it.

Let's rename ARCH_KMALLOC_MINALIGN to ARCH_DMA_MINALIGN.
ARCH_KMALLOC_MINALIGN is used only in the internals of slab/slob/slub
(except for crypto).

Signed-off-by: FUJITA Tomonori 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

MIPS: cpumask_of_node() should handle -1 as a node

2010-01-12T17:19:37+00:00

pcibus_to_node can return -1 if we cannot determine which node a pci bus
is on. If passed -1, cpumask_of_node will negatively index the lookup array
and pull in random data:

# cat /sys/devices/pci0000:00/0000:00:01.0/local_cpus
00000000,00000003,00000000,00000000
# cat /sys/devices/pci0000:00/0000:00:01.0/local_cpulist
64-65

Change cpumask_of_node to check for -1 and return cpu_all_mask in this
case:

# cat /sys/devices/pci0000:00/0000:00:01.0/local_cpus
ffffffff,ffffffff,ffffffff,ffffffff
# cat /sys/devices/pci0000:00/0000:00:01.0/local_cpulist
0-127

Signed-off-by: Anton Blanchard 
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: Rusty Russell 
Cc: Andrew Morton 
Patchwork: http://patchwork.linux-mips.org/patch/831/
Signed-off-by: Ralf Baechle

MIPS: IP27: Fix build

2009-11-02T11:00:01+00:00

Broken by 182a85f8a119c789610a9d464f4129ded9f3c107.

Signed-off-by: Ralf Baechle

cpumask: remove obsolete node_to_cpumask now everyone uses cpumask_of_node

2009-09-24T00:04:34+00:00

Signed-off-by: Rusty Russell

cpumask: remove the now-obsoleted pcibus_to_cpumask(): mips

2009-09-24T00:04:25+00:00

cpumask_of_pcibus() is the new version.

Signed-off-by: Rusty Russell

sched: Disable wakeup balancing

2009-09-16T14:44:33+00:00

Sysbench thinks SD_BALANCE_WAKE is too agressive and kbuild doesn't
really mind too much, SD_BALANCE_NEWIDLE picks up most of the
slack.

On a dual socket, quad core, dual thread nehalem system:

sysbench (--num_threads=16):

 SD_BALANCE_WAKE-: 13982 tx/s
 SD_BALANCE_WAKE+: 15688 tx/s

kbuild (-j16):

 SD_BALANCE_WAKE-: 47.648295846  seconds time elapsed   ( +-   0.312% )
 SD_BALANCE_WAKE+: 47.608607360  seconds time elapsed   ( +-   0.026% )

(same within noise)

Signed-off-by: Peter Zijlstra 
LKML-Reference: 
Signed-off-by: Ingo Molnar

sched: Merge select_task_rq_fair() and sched_balance_self()

2009-09-15T14:01:05+00:00

The problem with wake_idle() is that is doesn't respect things like
cpu_power, which means it doesn't deal well with SMT nor the recent
RT interaction.

To cure this, it needs to do what sched_balance_self() does, which
leads to the possibility of merging select_task_rq_fair() and
sched_balance_self().

Modify sched_balance_self() to:

  - update_shares() when walking up the domain tree,
    (it only called it for the top domain, but it should
     have done this anyway), which allows us to remove
    this ugly bit from try_to_wake_up().

  - do wake_affine() on the smallest domain that contains
    both this (the waking) and the prev (the wakee) cpu for
    WAKE invocations.

Then use the top-down balance steps it had to replace wake_idle().

This leads to the dissapearance of SD_WAKE_BALANCE and
SD_WAKE_IDLE_FAR, with SD_WAKE_IDLE replaced with SD_BALANCE_WAKE.

SD_WAKE_AFFINE needs SD_BALANCE_WAKE to be effective.

Touch all topology bits to replace the old with new SD flags --
platforms might need re-tuning, enabling SD_BALANCE_WAKE
conditionally on a NUMA distance seems like a good additional
feature, magny-core and small nehalem systems would want this
enabled, systems with slow interconnects would not.

Signed-off-by: Peter Zijlstra 
LKML-Reference: 
Signed-off-by: Ingo Molnar