linux-toradex.git/kernel/Makefile, branch v3.2-rc2-rt4

rt: Add the preempt-rt lock replacement APIs

2012-04-13T16:01:41+00:00

Map spinlocks, rwlocks, rw_semaphores and semaphores to the rt_mutex
based locking functions for preempt-rt.

Signed-off-by: Thomas Gleixner

sysctl: Move the implementation into fs/proc/proc_sysctl.c

2012-01-25T00:37:54+00:00

Move the core sysctl code from kernel/sysctl.c and kernel/sysctl_check.c
into fs/proc/proc_sysctl.c.

Currently sysctl maintenance is hampered by the sysctl implementation
being split across 3 files with artificial layering between them.
Consolidate the entire sysctl implementation into 1 file so that
it is easier to see what is going on and hopefully allowing for
simpler maintenance.

For functions that are now only used in fs/proc/proc_sysctl.c remove
their declarations from sysctl.h and make them static in fs/proc/proc_sysctl.c

Signed-off-by: Eric W. Biederman

PM: Make sysrq-o be available for CONFIG_PM unset

2012-01-13T23:33:03+00:00

After commit 1eb208aea3179dd2fc0cdeea45ef869d75b4fe70, "PM: Make
CONFIG_PM depend on (CONFIG_PM_SLEEP || CONFIG_PM_RUNTIME)", the
files under kernel/power are not built unless CONFIG_PM_SLEEP or
CONFIG_PM_RUNTIME is set.  In particular, this causes
kernel/power/poweroff.c to be omitted, even though it should be
compiled, because CONFIG_MAGIC_SYSRQ is set.

Fix the problem by causing kernel/power/Makefile to be processed
for CONFIG_PM unset too.

Reported-and-tested-by: Phil Oester 
Signed-off-by: Rafael J. Wysocki

sched: Move all scheduler bits into kernel/sched/

2011-11-17T11:20:22+00:00

There's too many sched*.[ch] files in kernel/, give them their own
directory.

(No code changed, other than Makefile glue added.)

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

sched: Make separate sched*.c translation units

2011-11-17T11:20:19+00:00

Since once needs to do something at conferences and fixing compile
warnings doesn't actually require much if any attention I decided
to break up the sched.c #include "*.c" fest.

This further modularizes the scheduler code.

Signed-off-by: Peter Zijlstra 
Link: http://lkml.kernel.org/n/tip-x0fcd3mnp8f9c99grcpewmhi@git.kernel.org
Signed-off-by: Ingo Molnar

Merge branch 'devel-stable' of http://ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur/linux-2.6-arm

2011-10-28T19:02:27+00:00

* 'devel-stable' of http://ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur/linux-2.6-arm: (178 commits)
  ARM: 7139/1: fix compilation with CONFIG_ARM_ATAG_DTB_COMPAT and large TEXT_OFFSET
  ARM: gic, local timers: use the request_percpu_irq() interface
  ARM: gic: consolidate PPI handling
  ARM: switch from NO_MACH_MEMORY_H to NEED_MACH_MEMORY_H
  ARM: mach-s5p64x0: remove mach/memory.h
  ARM: mach-s3c64xx: remove mach/memory.h
  ARM: plat-mxc: remove mach/memory.h
  ARM: mach-prima2: remove mach/memory.h
  ARM: mach-zynq: remove mach/memory.h
  ARM: mach-bcmring: remove mach/memory.h
  ARM: mach-davinci: remove mach/memory.h
  ARM: mach-pxa: remove mach/memory.h
  ARM: mach-ixp4xx: remove mach/memory.h
  ARM: mach-h720x: remove mach/memory.h
  ARM: mach-vt8500: remove mach/memory.h
  ARM: mach-s5pc100: remove mach/memory.h
  ARM: mach-tegra: remove mach/memory.h
  ARM: plat-tcc: remove mach/memory.h
  ARM: mach-mmp: remove mach/memory.h
  ARM: mach-cns3xxx: remove mach/memory.h
  ...

Fix up mostly pretty trivial conflicts in:
 - arch/arm/Kconfig
 - arch/arm/include/asm/localtimer.h
 - arch/arm/kernel/Makefile
 - arch/arm/mach-shmobile/board-ap4evb.c
 - arch/arm/mach-u300/core.c
 - arch/arm/mm/dma-mapping.c
 - arch/arm/mm/proc-v7.S
 - arch/arm/plat-omap/Kconfig
largely due to some CONFIG option renaming (ie CONFIG_PM_SLEEP ->
CONFIG_ARM_CPU_SUSPEND for the arm-specific suspend code etc) and
addition of NEED_MACH_MEMORY_H next to HAVE_IDE.

cpu_pm: Add cpu power management notifiers

2011-09-23T06:35:29+00:00

During some CPU power modes entered during idle, hotplug and
suspend, peripherals located in the CPU power domain, such as
the GIC, localtimers, and VFP, may be powered down.  Add a
notifier chain that allows drivers for those peripherals to
be notified before and after they may be reset.

Notified drivers can include VFP co-processor, interrupt controller
and it's PM extensions, local CPU timers context save/restore which
shouldn't be interrupted. Hence CPU PM event APIs  must be called
with interrupts disabled.

Signed-off-by: Colin Cross 
Signed-off-by: Santosh Shilimkar 
Reviewed-by: Kevin Hilman 
Tested-and-Acked-by: Shawn Guo 
Tested-by: Kevin Hilman 
Tested-by: Vishwanath BS

PM QoS: Move and rename the implementation files

2011-08-25T13:35:03+00:00

The PM QoS implementation files are better named
kernel/power/qos.c and include/linux/pm_qos.h.

The PM QoS support is compiled under the CONFIG_PM option.

Signed-off-by: Jean Pihet 
Acked-by: markgross 
Reviewed-by: Kevin Hilman 
Signed-off-by: Rafael J. Wysocki

jump label: Reduce the cycle count by changing the link order

2011-08-05T21:57:33+00:00

In the course of testing jump labels for use with the CFS
bandwidth controller, Paul Turner, discovered that using jump
labels reduced the branch count and the instruction count, but
did not reduce the cycle count or wall time.

I noticed that having the jump_label.o included in the kernel
but not used in any way still caused this increase in cycle
count and wall time. Thus, I moved jump_label.o in the
kernel/Makefile, thus changing the link order, and presumably
moving it out of hot icache areas. This brought down the cycle
count/time as expected.

In addition to Paul's testing,  I've tested the patch using a
single 'static_branch()' in the getppid() path, and basically
running tight loops of calls to getppid(). Here are my results
for the branch disabled case:

With jump labels turned on (CONFIG_JUMP_LABEL), branch disabled:

 Performance counter stats for 'bash -c /tmp/getppid;true' (50 runs):

     3,969,510,217 instructions             #	   0.864 IPC     ( +-0.000% )
     4,592,334,954 cycles                     ( +-   0.046% )
       751,634,470 branches                   ( +-   0.000% )

        1.722635797  seconds time elapsed   ( +-   0.046% )

Jump labels turned off (CONFIG_JUMP_LABEL not set), branch
disabled:

 Performance counter stats for 'bash -c /tmp/getppid;true' (50 runs):

     4,009,611,846 instructions             #	   0.867 IPC     ( +-0.000% )
     4,622,210,580 cycles                     ( +-   0.012% )
       771,662,904 branches                   ( +-   0.000% )

        1.734341454  seconds time elapsed   ( +-   0.022% )

Signed-off-by: Jason Baron 
Cc: rth@redhat.com
Cc: a.p.zijlstra@chello.nl
Cc: rostedt@goodmis.org
Link: http://lkml.kernel.org/r/20110805204040.GG2522@redhat.com
Signed-off-by: Ingo Molnar 
Tested-by: Paul Turner

kernel: prevent unnecessary rebuilding due to config_data.gz

2011-07-19T23:32:32+00:00

When IKCONFIG is built-in make oldconfig will cause the kernel to be
relinked even if .config didn't change. This happens because of a
config_data.gz dependency on .config. This patch changes the if_changed
to a filechk so that config_data.h is only rebuilt when the contents
have actually changed.

Signed-off-by: Peter Foley 
Signed-off-by: Michal Marek