linux-stable.git/arch/xtensa/kernel/time.c, branch v3.11.2

xtensa: delete __cpuinit usage from all xtensa files

2013-07-14T23:36:56+00:00

The __cpuinit type of throwaway sections might have made sense
some time ago when RAM was more constrained, but now the savings
do not offset the cost and complications.  For example, the fix in
commit 5e427ec2d0 ("x86: Fix bit corruption at CPU resume time")
is a good example of the nasty type of bugs that can be created
with improper use of the various __init prefixes.

After a discussion on LKML[1] it was decided that cpuinit should go
the way of devinit and be phased out.  Once all the users are gone,
we can then finally remove the macros themselves from linux/init.h.

Note that some harmless section mismatch warnings may result, since
notify_cpu_starting() and cpu_up() are arch independent (kernel/cpu.c)
are flagged as __cpuinit  -- so if we remove the __cpuinit from
arch specific callers, we will also get section mismatch warnings.
As an intermediate step, we intend to turn the linux/init.h cpuinit
content into no-ops as early as possible, since that will get rid
of these warnings.  In any case, they are temporary and harmless.

This removes all the arch/xtensa uses of the __cpuinit macros from
all C files.  Currently xtensa does not have any __CPUINIT used in
assembly files.

[1] https://lkml.org/lkml/2013/5/20/589

Cc: Chris Zankel 
Cc: Max Filippov 
Cc: linux-xtensa@linux-xtensa.org
Signed-off-by: Paul Gortmaker

xtensa: ccount based sched_clock

2013-07-08T08:11:38+00:00

Signed-off-by: Baruch Siach 
Signed-off-by: Chris Zankel

xtensa: ccount based clockevent implementation

2013-07-08T08:11:38+00:00

Reused some code from a preliminary implementation by Max Fillippov.

Cc: Max Filippov 
Signed-off-by: Baruch Siach 
Signed-off-by: Chris Zankel

xtensa: cleanup ccount frequency tracking

2013-07-08T08:11:37+00:00

Remove unused nsec_per_ccount, and rename ccount_per_jiffy to ccount_preq.

Signed-off-by: Baruch Siach 
Signed-off-by: Chris Zankel

xtensa: add IRQ domains support

2012-12-19T05:10:23+00:00

IRQ domains provide a mechanism for conversion of linux IRQ numbers to
hardware IRQ numbers and vice versus. It is used by OpenFirmware for
linking device tree objects to their respective interrupt controllers.

Signed-off-by: Max Filippov 
Signed-off-by: Chris Zankel

xtensa:fix the incompatible pointer type warning in time.c

2012-12-19T05:10:20+00:00

Fix the definition of the function ccount_read to be compatible
to the member read of the structure clocksource.

Signed-off-by: Wanlong Gao 
Signed-off-by: Chris Zankel

clocksource: xtensa: Convert to clocksource_register_hz/khz

2011-11-22T03:01:04+00:00

This converts the xtensa clocksource to use clocksource_register_hz/khz

This is untested, so any assistance in testing would be appreciated!

CC: Chris Zankel 
CC: Thomas Gleixner 
Signed-off-by: John Stultz

xtensa: Switch do_timer() to xtime_update()

2011-01-31T13:55:46+00:00

xtime_update() takes the xtime_lock itself.

set_linux_timer() does not need to be protected by xtime_lock.

[ tglx: This code is broken on SMP anyway. ]

Signed-off-by: Torben Hohn 
Cc: Chris Zankel 
Cc: Peter Zijlstra 
Cc: johnstul@us.ibm.com
Cc: hch@infradead.org
Cc: yong.zhang0@gmail.com
LKML-Reference: <20110127150027.23248.61798.stgit@localhost>
Signed-off-by: Thomas Gleixner

xtensa: Fix unnecessary setting of xtime

2010-03-12T23:36:37+00:00

xtensa supports read_persisitent_clock(), so there is no reason for
the arch specific code to be setting xtime.  Setting xtime will be
done by the generic timekeeping code.

Signed-off-by: John Stultz 
Cc: Chris Zankel 
Cc: Ingo Molnar 
Signed-off-by: Andrew Morton 
Signed-off-by: Thomas Gleixner

headers: remove sched.h from interrupt.h

2009-10-11T18:20:58+00:00

After m68k's task_thread_info() doesn't refer to current,
it's possible to remove sched.h from interrupt.h and not break m68k!
Many thanks to Heiko Carstens for allowing this.

Signed-off-by: Alexey Dobriyan