linux-toradex.git/arch/s390/oprofile, branch v3.2.63

oprofile: Fix uninitialized memory access when writing to writing to oprofilefs

2011-12-19T16:18:43+00:00

If oprofilefs_ulong_from_user() is called with count equals
zero, *val remains unchanged. Depending on the implementation it
might be uninitialized.

Change oprofilefs_ulong_from_user()'s interface to return count
on success. Thus, we are able to return early if count equals
zero which avoids using *val uninitialized. Fixing all users of
oprofilefs_ulong_ from_user().

This follows write syscall implementation when count is zero:
"If count is zero ... [and if] no errors are detected, 0 will be
returned without causing any other effect." (man 2 write)

Reported-By: Mike Waychison 
Signed-off-by: Robert Richter 
Cc: Andrew Morton 
Cc: 
Cc: oprofile-list 
Link: http://lkml.kernel.org/r/20111219153830.GH16765@erda.amd.com
Signed-off-by: Ingo Molnar

[S390] sparse: fix sparse ANSI-C warnings

2011-10-30T14:16:46+00:00

Fix prototype of some functions in arch/s390/oprofile to avoid non-ANSI
warnings from sparse.

Signed-off-by: Martin Schwidefsky

Merge branch 'master' into for-next

2011-07-11T12:15:55+00:00

Sync with Linus' tree to be able to apply pending patches that
are based on newer code already present upstream.

[S390] hwsampler: Set a sane default sampling rate

2011-06-22T14:24:20+00:00

The sampling interval for the hardware sampler is specified in cycles.
(see SA23-2260-01 The Load-Program-Parameter and the CPU-Measurement
Facilities)
The current default value will therefore result in millions of samples.
This patch changes the default sampling interval to 4M, which will
result in ~1500 samples per second on a z196 reducing the overhead
of sampling.

Signed-off-by: Christian Borntraeger 
Signed-off-by: Martin Schwidefsky

[S390] s390: enforce HW limits for the initial sampling rate

2011-06-22T14:24:20+00:00

On specific configurations with hwsampler opcontrol --start returns an
error on "echo 1 >/dev/oprofile/enable". Turns out that the hw sampling
interval is not checked against the hardware limits.

Signed-off-by: Christian Borntraeger 
Signed-off-by: Martin Schwidefsky

treewide: remove duplicate includes

2011-06-20T14:08:19+00:00

Many stupid corrections of duplicated includes based on the output of
scripts/checkincludes.pl.

Signed-off-by: Vitaliy Ivanov 
Signed-off-by: Jiri Kosina

[S390] hwsampler: allow cpu hotplug

2011-05-26T07:48:25+00:00

The hardware sample cpu hotplug notifier always returns NOTIFY_BAD.
That will prevent cpu hotplug if the machine is enabled for hardware
sampling even if it is not used. Fix the cpu hotplug notifier and
allow cpu hotplug if hardware sampling is unused.

Signed-off-by: Martin Schwidefsky 
Signed-off-by: Heiko Carstens

[S390] irq: merge irq.c and s390_ext.c

2011-05-26T07:48:24+00:00

Merge irq.c and s390_ext.c into irq.c. That way all external interrupt
related functions are together.

Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

[S390] oprofile: dont access lowcore

2011-05-23T08:24:32+00:00

The external interrupt parameter is passed as function call parameter.
No need to access lowcore.

Signed-off-by: Heiko Carstens

[S390] oprofile: add missing irq stats counter

2011-05-23T08:24:32+00:00

Count CPU measurement external interrupts as well.

Signed-off-by: Heiko Carstens