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authorMauro Carvalho Chehab <mchehab@redhat.com>2012-04-24 15:05:43 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2012-06-11 13:23:45 -0300
commitde3910eb79ac8c0f29a11224661c0ebaaf813039 (patch)
tree44584d6691588b2c18823260be0e44f0c9872d02 /drivers/edac/edac_mc_sysfs.c
parente39f4ea9b01f137f9e6fa631f3e9088fb9175e91 (diff)
downloadlinaro-lsk-de3910eb79ac8c0f29a11224661c0ebaaf813039.tar.gz
edac: change the mem allocation scheme to make Documentation/kobject.txt happy
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>
Diffstat (limited to 'drivers/edac/edac_mc_sysfs.c')
-rw-r--r--drivers/edac/edac_mc_sysfs.c126
1 files changed, 72 insertions, 54 deletions
diff --git a/drivers/edac/edac_mc_sysfs.c b/drivers/edac/edac_mc_sysfs.c
index 0f671907c90..87b8d7d6385 100644
--- a/drivers/edac/edac_mc_sysfs.c
+++ b/drivers/edac/edac_mc_sysfs.c
@@ -82,7 +82,7 @@ module_param_call(edac_mc_poll_msec, edac_set_poll_msec, param_get_int,
&edac_mc_poll_msec, 0644);
MODULE_PARM_DESC(edac_mc_poll_msec, "Polling period in milliseconds");
-static struct device mci_pdev;
+static struct device *mci_pdev;
/*
* various constants for Memory Controllers
@@ -181,7 +181,7 @@ static ssize_t csrow_size_show(struct device *dev,
u32 nr_pages = 0;
for (i = 0; i < csrow->nr_channels; i++)
- nr_pages += csrow->channels[i].dimm->nr_pages;
+ nr_pages += csrow->channels[i]->dimm->nr_pages;
return sprintf(data, "%u\n", PAGES_TO_MiB(nr_pages));
}
@@ -190,7 +190,7 @@ static ssize_t csrow_mem_type_show(struct device *dev,
{
struct csrow_info *csrow = to_csrow(dev);
- return sprintf(data, "%s\n", mem_types[csrow->channels[0].dimm->mtype]);
+ return sprintf(data, "%s\n", mem_types[csrow->channels[0]->dimm->mtype]);
}
static ssize_t csrow_dev_type_show(struct device *dev,
@@ -198,7 +198,7 @@ static ssize_t csrow_dev_type_show(struct device *dev,
{
struct csrow_info *csrow = to_csrow(dev);
- return sprintf(data, "%s\n", dev_types[csrow->channels[0].dimm->dtype]);
+ return sprintf(data, "%s\n", dev_types[csrow->channels[0]->dimm->dtype]);
}
static ssize_t csrow_edac_mode_show(struct device *dev,
@@ -207,7 +207,7 @@ static ssize_t csrow_edac_mode_show(struct device *dev,
{
struct csrow_info *csrow = to_csrow(dev);
- return sprintf(data, "%s\n", edac_caps[csrow->channels[0].dimm->edac_mode]);
+ return sprintf(data, "%s\n", edac_caps[csrow->channels[0]->dimm->edac_mode]);
}
/* show/store functions for DIMM Label attributes */
@@ -217,7 +217,7 @@ static ssize_t channel_dimm_label_show(struct device *dev,
{
struct csrow_info *csrow = to_csrow(dev);
unsigned chan = to_channel(mattr);
- struct rank_info *rank = &csrow->channels[chan];
+ struct rank_info *rank = csrow->channels[chan];
/* if field has not been initialized, there is nothing to send */
if (!rank->dimm->label[0])
@@ -233,7 +233,7 @@ static ssize_t channel_dimm_label_store(struct device *dev,
{
struct csrow_info *csrow = to_csrow(dev);
unsigned chan = to_channel(mattr);
- struct rank_info *rank = &csrow->channels[chan];
+ struct rank_info *rank = csrow->channels[chan];
ssize_t max_size = 0;
@@ -250,7 +250,7 @@ static ssize_t channel_ce_count_show(struct device *dev,
{
struct csrow_info *csrow = to_csrow(dev);
unsigned chan = to_channel(mattr);
- struct rank_info *rank = &csrow->channels[chan];
+ struct rank_info *rank = csrow->channels[chan];
return sprintf(data, "%u\n", rank->ce_count);
}
@@ -283,9 +283,12 @@ static const struct attribute_group *csrow_attr_groups[] = {
NULL
};
-static void csrow_attr_release(struct device *device)
+static void csrow_attr_release(struct device *dev)
{
- debugf1("Releasing csrow device %s\n", dev_name(device));
+ struct csrow_info *csrow = container_of(dev, struct csrow_info, dev);
+
+ debugf1("Releasing csrow device %s\n", dev_name(dev));
+ kfree(csrow);
}
static struct device_type csrow_attr_type = {
@@ -352,7 +355,7 @@ static inline int nr_pages_per_csrow(struct csrow_info *csrow)
int chan, nr_pages = 0;
for (chan = 0; chan < csrow->nr_channels; chan++)
- nr_pages += csrow->channels[chan].dimm->nr_pages;
+ nr_pages += csrow->channels[chan]->dimm->nr_pages;
return nr_pages;
}
@@ -382,7 +385,7 @@ static int edac_create_csrow_object(struct mem_ctl_info *mci,
for (chan = 0; chan < csrow->nr_channels; chan++) {
/* Only expose populated DIMMs */
- if (!csrow->channels[chan].dimm->nr_pages)
+ if (!csrow->channels[chan]->dimm->nr_pages)
continue;
err = device_create_file(&csrow->dev,
dynamic_csrow_dimm_attr[chan]);
@@ -418,10 +421,10 @@ static int edac_create_csrow_objects(struct mem_ctl_info *mci)
struct csrow_info *csrow;
for (i = 0; i < mci->nr_csrows; i++) {
- csrow = &mci->csrows[i];
+ csrow = mci->csrows[i];
if (!nr_pages_per_csrow(csrow))
continue;
- err = edac_create_csrow_object(mci, &mci->csrows[i], i);
+ err = edac_create_csrow_object(mci, mci->csrows[i], i);
if (err < 0)
goto error;
}
@@ -429,18 +432,18 @@ static int edac_create_csrow_objects(struct mem_ctl_info *mci)
error:
for (--i; i >= 0; i--) {
- csrow = &mci->csrows[i];
+ csrow = mci->csrows[i];
if (!nr_pages_per_csrow(csrow))
continue;
for (chan = csrow->nr_channels - 1; chan >= 0; chan--) {
- if (!csrow->channels[chan].dimm->nr_pages)
+ if (!csrow->channels[chan]->dimm->nr_pages)
continue;
device_remove_file(&csrow->dev,
dynamic_csrow_dimm_attr[chan]);
device_remove_file(&csrow->dev,
dynamic_csrow_ce_count_attr[chan]);
}
- put_device(&mci->csrows[i].dev);
+ put_device(&mci->csrows[i]->dev);
}
return err;
@@ -452,11 +455,11 @@ static void edac_delete_csrow_objects(struct mem_ctl_info *mci)
struct csrow_info *csrow;
for (i = mci->nr_csrows - 1; i >= 0; i--) {
- csrow = &mci->csrows[i];
+ csrow = mci->csrows[i];
if (!nr_pages_per_csrow(csrow))
continue;
for (chan = csrow->nr_channels - 1; chan >= 0; chan--) {
- if (!csrow->channels[chan].dimm->nr_pages)
+ if (!csrow->channels[chan]->dimm->nr_pages)
continue;
debugf1("Removing csrow %d channel %d sysfs nodes\n",
i, chan);
@@ -465,8 +468,8 @@ static void edac_delete_csrow_objects(struct mem_ctl_info *mci)
device_remove_file(&csrow->dev,
dynamic_csrow_ce_count_attr[chan]);
}
- put_device(&mci->csrows[i].dev);
- device_del(&mci->csrows[i].dev);
+ put_device(&mci->csrows[i]->dev);
+ device_del(&mci->csrows[i]->dev);
}
}
#endif
@@ -585,9 +588,12 @@ static const struct attribute_group *dimm_attr_groups[] = {
NULL
};
-static void dimm_attr_release(struct device *device)
+static void dimm_attr_release(struct device *dev)
{
- debugf1("Releasing dimm device %s\n", dev_name(device));
+ struct dimm_info *dimm = container_of(dev, struct dimm_info, dev);
+
+ debugf1("Releasing dimm device %s\n", dev_name(dev));
+ kfree(dimm);
}
static struct device_type dimm_attr_type = {
@@ -641,13 +647,13 @@ static ssize_t mci_reset_counters_store(struct device *dev,
mci->ce_noinfo_count = 0;
for (row = 0; row < mci->nr_csrows; row++) {
- struct csrow_info *ri = &mci->csrows[row];
+ struct csrow_info *ri = mci->csrows[row];
ri->ue_count = 0;
ri->ce_count = 0;
for (chan = 0; chan < ri->nr_channels; chan++)
- ri->channels[chan].ce_count = 0;
+ ri->channels[chan]->ce_count = 0;
}
cnt = 1;
@@ -779,10 +785,10 @@ static ssize_t mci_size_mb_show(struct device *dev,
int total_pages = 0, csrow_idx, j;
for (csrow_idx = 0; csrow_idx < mci->nr_csrows; csrow_idx++) {
- struct csrow_info *csrow = &mci->csrows[csrow_idx];
+ struct csrow_info *csrow = mci->csrows[csrow_idx];
for (j = 0; j < csrow->nr_channels; j++) {
- struct dimm_info *dimm = csrow->channels[j].dimm;
+ struct dimm_info *dimm = csrow->channels[j]->dimm;
total_pages += dimm->nr_pages;
}
@@ -889,9 +895,12 @@ static const struct attribute_group *mci_attr_groups[] = {
NULL
};
-static void mci_attr_release(struct device *device)
+static void mci_attr_release(struct device *dev)
{
- debugf1("Releasing mci device %s\n", dev_name(device));
+ struct mem_ctl_info *mci = container_of(dev, struct mem_ctl_info, dev);
+
+ debugf1("Releasing csrow device %s\n", dev_name(dev));
+ kfree(mci);
}
static struct device_type mci_attr_type = {
@@ -950,29 +959,28 @@ int edac_create_sysfs_mci_device(struct mem_ctl_info *mci)
{
int i, err;
- debugf0("%s() idx=%d\n", __func__, mci->mc_idx);
+ /*
+ * The memory controller needs its own bus, in order to avoid
+ * namespace conflicts at /sys/bus/edac.
+ */
+ mci->bus.name = kasprintf(GFP_KERNEL, "mc%d", mci->mc_idx);
+ if (!mci->bus.name)
+ return -ENOMEM;
+ debugf0("creating bus %s\n",mci->bus.name);
+ err = bus_register(&mci->bus);
+ if (err < 0)
+ return err;
/* get the /sys/devices/system/edac subsys reference */
-
mci->dev.type = &mci_attr_type;
device_initialize(&mci->dev);
- mci->dev.parent = &mci_pdev;
+ mci->dev.parent = mci_pdev;
mci->dev.bus = &mci->bus;
dev_set_name(&mci->dev, "mc%d", mci->mc_idx);
dev_set_drvdata(&mci->dev, mci);
pm_runtime_forbid(&mci->dev);
- /*
- * The memory controller needs its own bus, in order to avoid
- * namespace conflicts at /sys/bus/edac.
- */
- debugf0("creating bus %s\n",mci->bus.name);
- mci->bus.name = kstrdup(dev_name(&mci->dev), GFP_KERNEL);
- err = bus_register(&mci->bus);
- if (err < 0)
- return err;
-
debugf0("%s(): creating device %s\n", __func__,
dev_name(&mci->dev));
err = device_add(&mci->dev);
@@ -986,7 +994,7 @@ int edac_create_sysfs_mci_device(struct mem_ctl_info *mci)
* Create the dimm/rank devices
*/
for (i = 0; i < mci->tot_dimms; i++) {
- struct dimm_info *dimm = &mci->dimms[i];
+ struct dimm_info *dimm = mci->dimms[i];
/* Only expose populated DIMMs */
if (dimm->nr_pages == 0)
continue;
@@ -1023,7 +1031,7 @@ int edac_create_sysfs_mci_device(struct mem_ctl_info *mci)
fail:
for (i--; i >= 0; i--) {
- struct dimm_info *dimm = &mci->dimms[i];
+ struct dimm_info *dimm = mci->dimms[i];
if (dimm->nr_pages == 0)
continue;
put_device(&dimm->dev);
@@ -1053,7 +1061,7 @@ void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
#endif
for (i = 0; i < mci->tot_dimms; i++) {
- struct dimm_info *dimm = &mci->dimms[i];
+ struct dimm_info *dimm = mci->dimms[i];
if (dimm->nr_pages == 0)
continue;
debugf0("%s(): removing device %s\n", __func__,
@@ -1072,9 +1080,15 @@ void edac_unregister_sysfs(struct mem_ctl_info *mci)
kfree(mci->bus.name);
}
-static void mc_attr_release(struct device *device)
+static void mc_attr_release(struct device *dev)
{
- debugf1("Releasing device %s\n", dev_name(device));
+ /*
+ * There's no container structure here, as this is just the mci
+ * parent device, used to create the /sys/devices/mc sysfs node.
+ * So, there are no attributes on it.
+ */
+ debugf1("Releasing device %s\n", dev_name(dev));
+ kfree(dev);
}
static struct device_type mc_attr_type = {
@@ -1095,21 +1109,25 @@ int __init edac_mc_sysfs_init(void)
return -EINVAL;
}
- mci_pdev.bus = edac_subsys;
- mci_pdev.type = &mc_attr_type;
- device_initialize(&mci_pdev);
- dev_set_name(&mci_pdev, "mc");
+ mci_pdev = kzalloc(sizeof(*mci_pdev), GFP_KERNEL);
+
+ mci_pdev->bus = edac_subsys;
+ mci_pdev->type = &mc_attr_type;
+ device_initialize(mci_pdev);
+ dev_set_name(mci_pdev, "mc");
- err = device_add(&mci_pdev);
+ err = device_add(mci_pdev);
if (err < 0)
return err;
+ debugf0("device %s created\n", dev_name(mci_pdev));
+
return 0;
}
void __exit edac_mc_sysfs_exit(void)
{
- put_device(&mci_pdev);
- device_del(&mci_pdev);
+ put_device(mci_pdev);
+ device_del(mci_pdev);
edac_put_sysfs_subsys();
}