Spelling fixes in arch/i386/.
Signed-off-by: NSimon Arlott <simon@fire.lp0.eu>
Signed-off-by: NAdrian Bunk <bunk@kernel.org>

This is from an earlier message from 'Christoph Lameter':

    cpu_core_map is currently an array defined using NR_CPUS. This means that
    we overallocate since we will rarely really use maximum configured cpu.

    If we put the cpu_core_map into the per cpu area then it will be allocated
    for each processor as it comes online.

    This means that the core map cannot be accessed until the per cpu area
    has been allocated. Xen does a weird thing here looping over all processors
    and zeroing the masks that are not yet allocated and that will be zeroed
    when they are allocated. I commented the code out.
Signed-off-by: NChristoph Lameter <clameter@sgi.com>
Signed-off-by: NMike Travis <travis@sgi.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: "Siddha, Suresh B" <suresh.b.siddha@intel.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

The equation to find the frequency given the fid and did is family dependant.
Acked-by: NMark Langsdorf <mark.langsdorf@amd.com>
Signed-off-by: NJoachim Deguara <joachim.deguara@amd.com>
Signed-off-by: NDave Jones <davej@redhat.com>

Signed-off-by: NThomas Renninger <trenn@suse.de>
Signed-off-by: NVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Bryan Wu <bryan.wu@analog.com>
Cc: Andi Kleen <ak@suse.de>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NDave Jones <davej@redhat.com>

powernow_k8

[PATCH] x86: use num_online_nodes to get physical cpus numbers for powernow_k8

For opteron based system, don't assume all physical cpus have the same booted cpus even same cores. esp for downcore case.

Signed-off-by: Yinghai Lu <yinghai.sun.com>
Signed-off-by: NDave Jones <davej@redhat.com>

This reverts commit 904f7a3f.

As noted by Peter Anvin:

  "It causes build failures on i386.

   Yet another case of unnecessary divergence between i386 and x86-64
   I'm afraid..."
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Based on a patch from Joachim which didn't apply, so I fixed
it up by hand, and also corrected the surrounding indentation
a little.
Signed-off-by: NJoachim.Deguara <joachim.deguara@amd.com>
Acked-by: NMark Langsdorf <mark.langsdorf@amd.com>
Signed-off-by: NDave Jones <davej@redhat.com>

Make it compile on UP.
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NDave Jones <davej@redhat.com>

Indicate number of processors and cores more cleanly
in startup messages.
Signed-off-by: NMark Langsdorf <mark.langsdorf@amd.com>
Signed-off-by: NDave Jones <davej@redhat.com>

Mark Langsdorf points out that the correct define for this
revision bump is 0x80000.  Also to save us having to keep
renaming the #define, give it a more meaningful name.
Signed-off-by: NDave Jones <davej@redhat.com>

Reported-by: NCalvin Dodge <caldodge@gmail.com>
Signed-off-by: NDave Jones <davej@redhat.com>

The PowerNow! driver for Opteron reports the number of cores
in the system, but claims to report the number of processors.
Fix this minor cosmetic bug.
Signed-off-by: NBhavana Nagendra <bhavana.nagendra@amd.com>
Acked-by: NMark Langsdorf <mark.langsdorf@amd.com>
Signed-off-by: NDave Jones <davej@redhat.com>

This reverts commit aeeddc14, which was
half-baked and broken.  It just resulted in compile errors, since
cpufreq_register_driver() still changes the 'driver_data' by setting
bits in the flags field.  So claiming it is 'const' _really_ doesn't
work.
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Not all cases are possible due to ->flags being set at runtime
on some drivers.
Signed-off-by: NDave Jones <davej@redhat.com>

This fixes the cpuinfo_cur_freq value by using the correct
find_khz_freq_from_fiddid() when the CPU uses hardware p-states.
Signed-off-by: NJoachim Deguara <joachim.deguara@amd.com>
Acked-by: NMark Langsdorf <mark.langsdorf@amd.com>
Signed-off-by: NDave Jones <davej@redhat.com>

Fix powernow-k8 doesn't load bug.
Reference: https://launchpad.net/distros/ubuntu/+source/linux-source-2.6.15/+bug/35145Signed-off-by: NBen Collins <bcollins@ubuntu.com>
Signed-off-by: NDave Jones <davej@redhat.com>

The fid/vid masks for parts using the extended parts are slightly incorrect and can result in
incorrect fid/vid codes being applied.  No instances of this problem have been reported in
the field but it could be a problem with future parts.
Signed-off-by: NMark Langsdorf <mark.langsdorf@amd.com>
Signed-off-by: NDave Jones <davej@redhat.com>

This patch clarifies the meaning of the cpu_family if
statements in the hw pstate driver patch for powernow-k8
Signed-off-by: NMark Langsdorf <mark.langsdorf@amd.com>
Signed-off-by: NDave Jones <davej@redhat.com>

Forthcoming AMD products will use a different algorithm for transitioning
pstates than the current generation Opteron products do.  The attached
patch allows the powernow-k8 driver to work with those products.
Signed-off-by: NMark Langsdorf <mark.langsdorf@amd.com>
Signed-off-by: NDave Jones <davej@redhat.com>

This var is already set at entry to the function.
Signed-off-by: NDave Jones <davej@redhat.com>

(Also fix some horked indentation)
Signed-off-by: NDave Jones <davej@redhat.com>

This patch fixes a check-after-use introduced by commit
4211a303 and spotted by the Coverity checker.
Signed-off-by: NAdrian Bunk <bunk@stusta.de>
Signed-off-by: NDave Jones <davej@redhat.com>

Remove a duplicate NULL pointer check introduced by commit
4211a303Signed-off-by: NTobias Klauser <tklauser@nuerscht.ch>
Signed-off-by: NDave Jones <davej@redhat.com>

This prevents crashes on dual core system when enough ticks are lost.

Replaces earlier patch by me.

(Duplicate null data check in powernowk8_get() removed -- davej)

 arch/i386/kernel/cpu/cpufreq/powernow-k8.c |   11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)
Signed-off-by: NThomas Renninger <trenn@suse.de>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NDave Jones <davej@redhat.com>

(Better fix to be applied in next patch)
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NDave Jones <davej@redhat.com>

This prevents crashes on dual core system when enough ticks are lost.

Replaces earlier patch by me.

Cc: Dave Jones <davej@redhat.com>
Signed-off-by: NThomas Renninger <trenn@suse.de>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Andi's previous fix to initialise powernow_data on all siblings
will not work properly with CPU Hotplug.
Signed-off-by: NJacob Shin <jacob.shin@amd.com>
Signed-off-by: NDave Jones <davej@redhat.com>

Semaphore to mutex conversion.

The conversion was generated via scripts, and the result was validated
automatically via a script as well.
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Cc: Dave Jones <davej@codemonkey.org.uk>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Jens Axboe <axboe@suse.de>
Cc: Neil Brown <neilb@cse.unsw.edu.au>
Acked-by: NAlasdair G Kergon <agk@redhat.com>
Cc: Greg KH <greg@kroah.com>
Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Cc: Adam Belay <ambx1@neo.rr.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

I got an oops on a dual core system because the lost tick handler
called cpufreq_get() on core 1 and powernow tried to follow
a NULL powernow_data[] pointer there.

Initialize powernow_data for all cores of a CPU.

Cc: Jacob Shin <jacob.shin@amd.com>
Cc: Dave Jones <davej@redhat.com>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

I screwed up this conversion - we should be iterating across online CPUs, not
possible ones.

Spotted by Joe Perches <joe@perches.com>

Cc: Dave Jones <davej@codemonkey.org.uk>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

When we stop allocating percpu memory for not-possible CPUs we must not touch
the percpu data for not-possible CPUs at all.  The correct way of doing this
is to test cpu_possible() or to use for_each_cpu().

This patch is a kernel-wide sweep of all instances of NR_CPUS.  I found very
few instances of this bug, if any.  But the patch converts lots of open-coded
test to use the preferred helper macros.

Cc: Mikael Starvik <starvik@axis.com>
Cc: David Howells <dhowells@redhat.com>
Acked-by: NKyle McMartin <kyle@parisc-linux.org>
Cc: Anton Blanchard <anton@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: William Lee Irwin III <wli@holomorphy.com>
Cc: Andi Kleen <ak@muc.de>
Cc: Christian Zankel <chris@zankel.net>
Cc: Philippe Elie <phil.el@wanadoo.fr>
Cc: Nathan Scott <nathans@sgi.com>
Cc: Jens Axboe <axboe@suse.de>
Cc: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

powernow-k8: Let cpufreq driver handle affected CPUs

Let the cpufreq driver manage AMD Dual-Core CPUs being tied together.

Since cpufreq driver's affected CPUs data, cpufreq_policy->cpus, already
knows about which cores are tied together, powernow driver does not have
keep its internal data for every core.  (even a pointer.. it will never
be called on)  Telling cpufreq driver about cpu_core_map at init time is
sufficient.
Signed-off-by: NJacob Shin <jacob.shin@amd.com>
Signed-off-by: NDave Jones <davej@redhat.com>

Signed-off-by: NDave Jones <davej@redhat.com>

Signed-off-by: NDave Jones <davej@redhat.com>

cpufreq init can be called when a CPU is set online.
Need to make powernow-k8's initialisation functions __cpuinit to
prevents oopses when a CPU is off/onlined on a AMD system

Cc: trenn@suse.de
Cc: mark.langsdorf@amd.com
Cc: davej@redhat.com
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

If a user has booted with 'quiet', some important messages don't
get displayed which really should. We've seen at least one case
where powernow-k8 stopped working, and the user needed a BIOS update
that they didn't know about.
Signed-off-by: NDave Jones <davej@redhat.com>

Signed-off-by: NDave Jones <davej@redhat.com>

Future versions of the Opteron processor may support
frequency transitions of 100 MHz, instead of the=20
current 200 MHz.  This patch enables the powernow-k8
driver to transition to an odd FID code, indicating
a multiple of 100 MHz frequency.
Signed-off-by: NJacob Shin <jacob.shin@amd.com>
Signed-off-by: NMark Langsdorf <mark.langsdorf@amd.com>
Signed-off-by: NDave Jones <davej@redhat.com>