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Date: Wed, 7 Oct 2015 15:27:02 +0300
From: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
To: Stephen Rothwell <sfr@...b.auug.org.au>, nab@...ux-iscsi.org,
Greg KH <greg@...ah.com>, Arnd Bergmann <arnd@...db.de>
Cc: linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
Christoph Hellwig <hch@....de>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Subject: [PATCH] stm class: Use per-attribute show and store methods in configfs policy
Since commit f9b2efa6dc ("Christoph Hellwig configfs: add show and store
methods to struct configfs_attribute"), there's no need to keep an extra
wrapper structure per item and the awkward show_attribute/store_attribute
item ops are no longer needed.
This patch converts policy code to the new api, all the while making the
code quite a bit smaller and easier on the eyes.
Signed-off-by: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
---
drivers/hwtracing/stm/policy.c | 105 ++++++++++-------------------------------
1 file changed, 24 insertions(+), 81 deletions(-)
diff --git a/drivers/hwtracing/stm/policy.c b/drivers/hwtracing/stm/policy.c
index 6498a9dbb7..11ab6d01ad 100644
--- a/drivers/hwtracing/stm/policy.c
+++ b/drivers/hwtracing/stm/policy.c
@@ -76,9 +76,10 @@ to_stp_policy_node(struct config_item *item)
NULL;
}
-static ssize_t stp_policy_node_masters_show(struct stp_policy_node *policy_node,
- char *page)
+static ssize_t
+stp_policy_node_masters_show(struct config_item *item, char *page)
{
+ struct stp_policy_node *policy_node = to_stp_policy_node(item);
ssize_t count;
count = sprintf(page, "%u %u\n", policy_node->first_master,
@@ -88,9 +89,10 @@ static ssize_t stp_policy_node_masters_show(struct stp_policy_node *policy_node,
}
static ssize_t
-stp_policy_node_masters_store(struct stp_policy_node *policy_node,
- const char *page, size_t count)
+stp_policy_node_masters_store(struct config_item *item, const char *page,
+ size_t count)
{
+ struct stp_policy_node *policy_node = to_stp_policy_node(item);
unsigned int first, last;
struct stm_device *stm;
char *p = (char *)page;
@@ -123,8 +125,9 @@ unlock:
}
static ssize_t
-stp_policy_node_channels_show(struct stp_policy_node *policy_node, char *page)
+stp_policy_node_channels_show(struct config_item *item, char *page)
{
+ struct stp_policy_node *policy_node = to_stp_policy_node(item);
ssize_t count;
count = sprintf(page, "%u %u\n", policy_node->first_channel,
@@ -134,9 +137,10 @@ stp_policy_node_channels_show(struct stp_policy_node *policy_node, char *page)
}
static ssize_t
-stp_policy_node_channels_store(struct stp_policy_node *policy_node,
- const char *page, size_t count)
+stp_policy_node_channels_store(struct config_item *item, const char *page,
+ size_t count)
{
+ struct stp_policy_node *policy_node = to_stp_policy_node(item);
unsigned int first, last;
struct stm_device *stm;
char *p = (char *)page;
@@ -171,71 +175,16 @@ static void stp_policy_node_release(struct config_item *item)
kfree(to_stp_policy_node(item));
}
-struct stp_policy_node_attribute {
- struct configfs_attribute attr;
- ssize_t (*show)(struct stp_policy_node *, char *);
- ssize_t (*store)(struct stp_policy_node *, const char *, size_t);
-};
-
-static ssize_t stp_policy_node_attr_show(struct config_item *item,
- struct configfs_attribute *attr,
- char *page)
-{
- struct stp_policy_node *policy_node = to_stp_policy_node(item);
- struct stp_policy_node_attribute *pn_attr =
- container_of(attr, struct stp_policy_node_attribute, attr);
- ssize_t count = 0;
-
- if (pn_attr->show)
- count = pn_attr->show(policy_node, page);
-
- return count;
-}
-
-static ssize_t stp_policy_node_attr_store(struct config_item *item,
- struct configfs_attribute *attr,
- const char *page, size_t len)
-{
- struct stp_policy_node *policy_node = to_stp_policy_node(item);
- struct stp_policy_node_attribute *pn_attr =
- container_of(attr, struct stp_policy_node_attribute, attr);
- ssize_t count = -EINVAL;
-
- if (pn_attr->store)
- count = pn_attr->store(policy_node, page, len);
-
- return count;
-}
-
static struct configfs_item_operations stp_policy_node_item_ops = {
.release = stp_policy_node_release,
- .show_attribute = stp_policy_node_attr_show,
- .store_attribute = stp_policy_node_attr_store,
};
-static struct stp_policy_node_attribute stp_policy_node_attr_range = {
- .attr = {
- .ca_owner = THIS_MODULE,
- .ca_name = "masters",
- .ca_mode = S_IRUGO | S_IWUSR,
- },
- .show = stp_policy_node_masters_show,
- .store = stp_policy_node_masters_store,
-};
-
-static struct stp_policy_node_attribute stp_policy_node_attr_channels = {
- .attr = {
- .ca_owner = THIS_MODULE,
- .ca_name = "channels",
- .ca_mode = S_IRUGO | S_IWUSR,
- },
- .show = stp_policy_node_channels_show,
- .store = stp_policy_node_channels_store,
-};
+CONFIGFS_ATTR(stp_policy_node_, masters);
+CONFIGFS_ATTR(stp_policy_node_, channels);
static struct configfs_attribute *stp_policy_node_attrs[] = {
- &stp_policy_node_attr_range.attr,
- &stp_policy_node_attr_channels.attr,
+ &stp_policy_node_attr_masters,
+ &stp_policy_node_attr_channels,
NULL,
};
@@ -298,20 +247,8 @@ static struct config_item_type stp_policy_node_type = {
/*
* Root group: policies.
*/
-static struct configfs_attribute stp_policy_attr_device = {
- .ca_owner = THIS_MODULE,
- .ca_name = "device",
- .ca_mode = S_IRUGO,
-};
-
-static struct configfs_attribute *stp_policy_attrs[] = {
- &stp_policy_attr_device,
- NULL,
-};
-
-static ssize_t stp_policy_attr_show(struct config_item *item,
- struct configfs_attribute *attr,
- char *page)
+static ssize_t stp_policy_device_show(struct config_item *item,
+ char *page)
{
struct stp_policy *policy = to_stp_policy(item);
ssize_t count;
@@ -324,6 +261,13 @@ static ssize_t stp_policy_attr_show(struct config_item *item,
return count;
}
+CONFIGFS_ATTR_RO(stp_policy_, device);
+
+static struct configfs_attribute *stp_policy_attrs[] = {
+ &stp_policy_attr_device,
+ NULL,
+};
+
void stp_policy_unbind(struct stp_policy *policy)
{
struct stm_device *stm = policy->stm;
@@ -350,7 +294,6 @@ static void stp_policy_release(struct config_item *item)
static struct configfs_item_operations stp_policy_item_ops = {
.release = stp_policy_release,
- .show_attribute = stp_policy_attr_show,
};
static struct configfs_group_operations stp_policy_group_ops = {
--
2.5.3
--
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