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

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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 <cmetcalf@tilera.com>
Cc: Aristeu Rozanski <arozansk@redhat.com>
Cc: Doug Thompson <norsk5@yahoo.com>
Cc: Greg K H <gregkh@linuxfoundation.org>
Cc: Borislav Petkov <borislav.petkov@amd.com>
Cc: Mark Gross <mark.gross@intel.com>
Cc: Tim Small <tim@buttersideup.com>
Cc: Ranganathan Desikan <ravi@jetztechnologies.com>
Cc: "Arvind R." <arvino55@gmail.com>
Cc: Olof Johansson <olof@lixom.net>
Cc: Egor Martovetsky <egor@pasemi.com>
Cc: Michal Marek <mmarek@suse.cz>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Hitoshi Mitake <h.mitake@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Shaohui Xie <Shaohui.Xie@freescale.com>
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Mauro Carvalho Chehab 2012-04-24 15:05:43 -03:00
parent e39f4ea9b0
commit de3910eb79
22 changed files with 247 additions and 169 deletions
Download patch file Download diff file Expand all files Collapse all files

67
include/linux/edac.h
View file

@ -412,7 +412,44 @@ struct edac_mc_layer {
#define EDAC_MAX_LAYERS 3
/**
* EDAC_DIMM_PTR - Macro responsible to find a pointer inside a pointer array
* EDAC_DIMM_OFF - Macro responsible to get a pointer offset inside a pointer array
* for the element given by [layer0,layer1,layer2] position
*
* @layers: a struct edac_mc_layer array, describing how many elements
* were allocated for each layer
* @n_layers: Number of layers at the @layers array
* @layer0: layer0 position
* @layer1: layer1 position. Unused if n_layers < 2
* @layer2: layer2 position. Unused if n_layers < 3
*
* For 1 layer, this macro returns &var[layer0] - &var
* For 2 layers, this macro is similar to allocate a bi-dimensional array
* and to return "&var[layer0][layer1] - &var"
* For 3 layers, this macro is similar to allocate a tri-dimensional array
* and to return "&var[layer0][layer1][layer2] - &var"
*
* A loop could be used here to make it more generic, but, as we only have
* 3 layers, this is a little faster.
* By design, layers can never be 0 or more than 3. If that ever happens,
* a NULL is returned, causing an OOPS during the memory allocation routine,
* with would point to the developer that he's doing something wrong.
*/
#define EDAC_DIMM_OFF(layers, nlayers, layer0, layer1, layer2) ({ \
int __i; \
if ((nlayers) == 1) \
__i = layer0; \
else if ((nlayers) == 2) \
__i = (layer1) + ((layers[1]).size * (layer0)); \
else if ((nlayers) == 3) \
__i = (layer2) + ((layers[2]).size * ((layer1) + \
((layers[1]).size * (layer0)))); \
else \
__i = -EINVAL; \
__i; \
})
/**
* EDAC_DIMM_PTR - Macro responsible to get a pointer inside a pointer array
* for the element given by [layer0,layer1,layer2] position
*
* @layers: a struct edac_mc_layer array, describing how many elements
@ -429,24 +466,14 @@ struct edac_mc_layer {
* and to return "&var[layer0][layer1]"
* For 3 layers, this macro is similar to allocate a tri-dimensional array
* and to return "&var[layer0][layer1][layer2]"
*
* A loop could be used here to make it more generic, but, as we only have
* 3 layers, this is a little faster.
* By design, layers can never be 0 or more than 3. If that ever happens,
* a NULL is returned, causing an OOPS during the memory allocation routine,
* with would point to the developer that he's doing something wrong.
*/
#define EDAC_DIMM_PTR(layers, var, nlayers, layer0, layer1, layer2) ({ \
typeof(var) __p; \
if ((nlayers) == 1) \
__p = &var[layer0]; \
else if ((nlayers) == 2) \
__p = &var[(layer1) + ((layers[1]).size * (layer0))]; \
else if ((nlayers) == 3) \
__p = &var[(layer2) + ((layers[2]).size * ((layer1) + \
((layers[1]).size * (layer0))))]; \
else \
typeof(*var) __p; \
int ___i = EDAC_DIMM_OFF(layers, nlayers, layer0, layer1, layer2); \
if (___i < 0) \
__p = NULL; \
else \
__p = (var)[___i]; \
__p; \
})
@ -486,8 +513,6 @@ struct dimm_info {
* patches in this series will fix this issue.
*/
struct rank_info {
struct device dev;
int chan_idx;
struct csrow_info *csrow;
struct dimm_info *dimm;
@ -513,7 +538,7 @@ struct csrow_info {
/* channel information for this csrow */
u32 nr_channels;
struct rank_info *channels;
struct rank_info **channels;
};
/*
@ -572,7 +597,7 @@ struct mem_ctl_info {
unsigned long (*ctl_page_to_phys) (struct mem_ctl_info * mci,
unsigned long page);
int mc_idx;
struct csrow_info *csrows;
struct csrow_info **csrows;
unsigned nr_csrows, num_cschannel;
/*
@ -592,7 +617,7 @@ struct mem_ctl_info {
* DIMM info. Will eventually remove the entire csrows_info some day
*/
unsigned tot_dimms;
struct dimm_info *dimms;
struct dimm_info **dimms;
/*
* FIXME - what about controllers on other busses? - IDs must be