linux-toradex.git/drivers/edac/pasemi_edac.c, branch v4.1.15

Drivers: edac: remove __dev* attributes.

2013-01-03T23:57:03+00:00

CONFIG_HOTPLUG is going away as an option.  As a result, the __dev*
markings need to be removed.

This change removes the use of __devinit, __devexit_p, and __devexit
from these drivers.

Based on patches originally written by Bill Pemberton, but redone by me
in order to handle some of the coding style issues better, by hand.

Cc: Bill Pemberton 
Cc: Doug Thompson 
Cc: Borislav Petkov 
Cc: Mark Gross 
Cc: Jason Uhlenkott 
Cc: Mauro Carvalho Chehab 
Cc: Tim Small 
Cc: Ranganathan Desikan 
Cc: "Arvind R." 
Cc: Ralf Baechle 
Cc: David Daney 
Cc: Egor Martovetsky 
Cc: Olof Johansson 
Cc: Chris Metcalf 
Signed-off-by: Greg Kroah-Hartman

edac: edac_mc_handle_error(): add an error_count parameter

2012-06-12T15:15:47+00:00

In order to avoid loosing error events, it is desirable to group
error events together and generate a single trace for several identical
errors.

The trace API already allows reporting multiple errors. Change the
handle_error function to also allow that.

The changes at the drivers were made by this small script:

	$file .=$_ while (<>);
	$file =~ s/(edac_mc_handle_error)\s*\(([^\,]+)\,([^\,]+)\,/$1($2,$3, 1,/g;
	print $file;

Signed-off-by: Mauro Carvalho Chehab

edac: remove arch-specific parameter for the error handler

2012-06-11T16:23:52+00:00

Remove the arch-dependent parameter, as it were not used,
as the MCE tracepoint weren't implemented. It probably doesn't
make sense to have an MCE-specific tracepoint, as this will
cost more bytes at the tracepoint, and tracepoint is not free.

The changes at the EDAC drivers were done by this small perl script:

	$file .=$_ while (<>);
	$file =~ s/(edac_mc_handle_error)\s*\(([^\;]+)\,([^\,\)]+)\s*\)/$1($2)/g;
	print $file;

Signed-off-by: Mauro Carvalho Chehab

edac: change the mem allocation scheme to make Documentation/kobject.txt happy

2012-06-11T16:23:45+00:00

Kernel kobjects have rigid rules: each container object should be
dynamically allocated, and can't be allocated into a single kmalloc.

EDAC never obeyed this rule: it has a single malloc function that
allocates all needed data into a single kzalloc.

As this is not accepted anymore, change the allocation schema of the
EDAC *_info structs to enforce this Kernel standard.

Acked-by: Chris Metcalf 
Cc: Aristeu Rozanski 
Cc: Doug Thompson 
Cc: Greg K H 
Cc: Borislav Petkov 
Cc: Mark Gross 
Cc: Tim Small 
Cc: Ranganathan Desikan 
Cc: "Arvind R." 
Cc: Olof Johansson 
Cc: Egor Martovetsky 
Cc: Michal Marek 
Cc: Jiri Kosina 
Cc: Dmitry Eremin-Solenikov 
Cc: Benjamin Herrenschmidt 
Cc: Hitoshi Mitake 
Cc: Andrew Morton 
Cc: Shaohui Xie 
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Mauro Carvalho Chehab

edac: Rename the parent dev to pdev

2012-06-11T14:56:06+00:00

As EDAC doesn't use struct device itself, it created a parent dev
pointer called as "pdev".  Now that we'll be converting it to use
struct device, instead of struct devsys, this needs to be fixed.

No functional changes.

Reviewed-by: Aristeu Rozanski 
Acked-by: Chris Metcalf 
Cc: Doug Thompson 
Cc: Borislav Petkov 
Cc: Mark Gross 
Cc: Jason Uhlenkott 
Cc: Tim Small 
Cc: Ranganathan Desikan 
Cc: "Arvind R." 
Cc: Olof Johansson 
Cc: Egor Martovetsky 
Cc: Michal Marek 
Cc: Jiri Kosina 
Cc: Joe Perches 
Cc: Dmitry Eremin-Solenikov 
Cc: Benjamin Herrenschmidt 
Cc: Hitoshi Mitake 
Cc: Andrew Morton 
Cc: "Niklas Söderlund" 
Cc: Shaohui Xie 
Cc: Josh Boyer 
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Mauro Carvalho Chehab

edac: Remove the legacy EDAC ABI

2012-05-28T22:13:50+00:00

Now that all drivers got converted to use the new ABI, we can
drop the old one.

Acked-by: Chris Metcalf 
Signed-off-by: Mauro Carvalho Chehab

pasemi_edac: convert driver to use the new edac ABI

2012-05-28T22:13:46+00:00

The legacy edac ABI is going to be removed. Port the driver to use
and benefit from the new API functionality.

Cc: Olof Johansson 
Cc: Egor Martovetsky 
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Mauro Carvalho Chehab

edac: move nr_pages to dimm struct

2012-05-28T22:10:58+00:00

The number of pages is a dimm property. Move it to the dimm struct.

After this change, it is possible to add sysfs nodes for the DIMM's that
will properly represent the DIMM stick properties, including its size.

A TODO fix here is to properly represent dual-rank/quad-rank DIMMs when
the memory controller represents the memory via chip select rows.

Reviewed-by: Aristeu Rozanski 
Acked-by: Borislav Petkov 
Acked-by: Chris Metcalf 
Cc: Doug Thompson 
Cc: Mark Gross 
Cc: Jason Uhlenkott 
Cc: Tim Small 
Cc: Ranganathan Desikan 
Cc: "Arvind R." 
Cc: Olof Johansson 
Cc: Egor Martovetsky 
Cc: Michal Marek 
Cc: Jiri Kosina 
Cc: Joe Perches 
Cc: Dmitry Eremin-Solenikov 
Cc: Benjamin Herrenschmidt 
Cc: Hitoshi Mitake 
Cc: Andrew Morton 
Cc: "Niklas Söderlund" 
Cc: Shaohui Xie 
Cc: Josh Boyer 
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Mauro Carvalho Chehab

edac: move dimm properties to struct dimm_info

2012-05-28T22:10:58+00:00

On systems based on chip select rows, all channels need to use memories
with the same properties, otherwise the memories on channels A and B
won't be recognized.

However, such assumption is not true for all types of memory
controllers.

Controllers for FB-DIMM's don't have such requirements.

Also, modern Intel controllers seem to be capable of handling such
differences.

So, we need to get rid of storing the DIMM information into a per-csrow
data, storing it, instead at the right place.

The first step is to move grain, mtype, dtype and edac_mode to the
per-dimm struct.

Reviewed-by: Aristeu Rozanski 
Reviewed-by: Borislav Petkov 
Acked-by: Chris Metcalf 
Cc: Doug Thompson 
Cc: Borislav Petkov 
Cc: Mark Gross 
Cc: Jason Uhlenkott 
Cc: Tim Small 
Cc: Ranganathan Desikan 
Cc: "Arvind R." 
Cc: Olof Johansson 
Cc: Egor Martovetsky 
Cc: Michal Marek 
Cc: Jiri Kosina 
Cc: Joe Perches 
Cc: Dmitry Eremin-Solenikov 
Cc: Benjamin Herrenschmidt 
Cc: Hitoshi Mitake 
Cc: Andrew Morton 
Cc: James Bottomley 
Cc: "Niklas Söderlund" 
Cc: Shaohui Xie 
Cc: Josh Boyer 
Cc: Mike Williams 
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Mauro Carvalho Chehab

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30T13:02:32+00:00

percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo 
Guess-its-ok-by: Christoph Lameter 
Cc: Ingo Molnar 
Cc: Lee Schermerhorn