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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH -next] xen: Use DEVICE_ATTR_*() macro
Use DEVICE_ATTR_*() helper instead of plain DEVICE_ATTR(),
which makes the code a bit shorter and easier to read.
Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx>
---
drivers/xen/pcpu.c | 6 +++---
drivers/xen/xen-balloon.c | 28 +++++++++++-----------------
drivers/xen/xenbus/xenbus_probe.c | 15 +++++++--------
3 files changed, 21 insertions(+), 28 deletions(-)
diff --git a/drivers/xen/pcpu.c b/drivers/xen/pcpu.c
index 1bcdd5227771..47aa3a1ccaf5 100644
--- a/drivers/xen/pcpu.c
+++ b/drivers/xen/pcpu.c
@@ -92,7 +92,7 @@ static int xen_pcpu_up(uint32_t cpu_id)
return HYPERVISOR_platform_op(&op);
}
-static ssize_t show_online(struct device *dev,
+static ssize_t online_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
@@ -101,7 +101,7 @@ static ssize_t show_online(struct device *dev,
return sprintf(buf, "%u\n", !!(cpu->flags & XEN_PCPU_FLAGS_ONLINE));
}
-static ssize_t __ref store_online(struct device *dev,
+static ssize_t __ref online_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
@@ -130,7 +130,7 @@ static ssize_t __ref store_online(struct device *dev,
ret = count;
return ret;
}
-static DEVICE_ATTR(online, S_IRUGO | S_IWUSR, show_online, store_online);
+static DEVICE_ATTR_RW(online);
static struct attribute *pcpu_dev_attrs[] = {
&dev_attr_online.attr,
diff --git a/drivers/xen/xen-balloon.c b/drivers/xen/xen-balloon.c
index a8d24433c8e9..8cd583db20b1 100644
--- a/drivers/xen/xen-balloon.c
+++ b/drivers/xen/xen-balloon.c
@@ -134,13 +134,13 @@ void xen_balloon_init(void)
EXPORT_SYMBOL_GPL(xen_balloon_init);
#define BALLOON_SHOW(name, format, args...) \
- static ssize_t show_##name(struct device *dev, \
+ static ssize_t name##_show(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
return sprintf(buf, format, ##args); \
} \
- static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL)
+ static DEVICE_ATTR_RO(name)
BALLOON_SHOW(current_kb, "%lu\n", PAGES2KB(balloon_stats.current_pages));
BALLOON_SHOW(low_kb, "%lu\n", PAGES2KB(balloon_stats.balloon_low));
@@ -152,16 +152,15 @@ static DEVICE_ULONG_ATTR(retry_count, 0444,
balloon_stats.retry_count);
static DEVICE_ULONG_ATTR(max_retry_count, 0644, balloon_stats.max_retry_count);
static DEVICE_BOOL_ATTR(scrub_pages, 0644, xen_scrub_pages);
-static ssize_t show_target_kb(struct device *dev, struct device_attribute
*attr,
+static ssize_t target_kb_show(struct device *dev, struct device_attribute
*attr,
char *buf)
{
return sprintf(buf, "%lu\n", PAGES2KB(balloon_stats.target_pages));
}
-static ssize_t store_target_kb(struct device *dev,
+static ssize_t target_kb_store(struct device *dev,
struct device_attribute *attr,
- const char *buf,
- size_t count)
+ const char *buf, size_t count)
{
char *endchar;
unsigned long long target_bytes;
@@ -176,22 +175,19 @@ static ssize_t store_target_kb(struct device *dev,
return count;
}
-static DEVICE_ATTR(target_kb, S_IRUGO | S_IWUSR,
- show_target_kb, store_target_kb);
+static DEVICE_ATTR_RW(target_kb);
-
-static ssize_t show_target(struct device *dev, struct device_attribute *attr,
- char *buf)
+static ssize_t target_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
{
return sprintf(buf, "%llu\n",
(unsigned long long)balloon_stats.target_pages
<< PAGE_SHIFT);
}
-static ssize_t store_target(struct device *dev,
+static ssize_t target_store(struct device *dev,
struct device_attribute *attr,
- const char *buf,
- size_t count)
+ const char *buf, size_t count)
{
char *endchar;
unsigned long long target_bytes;
@@ -206,9 +202,7 @@ static ssize_t store_target(struct device *dev,
return count;
}
-static DEVICE_ATTR(target, S_IRUGO | S_IWUSR,
- show_target, store_target);
-
+static DEVICE_ATTR_RW(target);
static struct attribute *balloon_attrs[] = {
&dev_attr_target_kb.attr,
diff --git a/drivers/xen/xenbus/xenbus_probe.c
b/drivers/xen/xenbus/xenbus_probe.c
index 97f0d234482d..33d09b3f6211 100644
--- a/drivers/xen/xenbus/xenbus_probe.c
+++ b/drivers/xen/xenbus/xenbus_probe.c
@@ -207,7 +207,7 @@ void xenbus_otherend_changed(struct xenbus_watch *watch,
EXPORT_SYMBOL_GPL(xenbus_otherend_changed);
#define XENBUS_SHOW_STAT(name) \
-static ssize_t show_##name(struct device *_dev,
\
+static ssize_t name##_show(struct device *_dev,
\
struct device_attribute *attr, \
char *buf) \
{ \
@@ -215,14 +215,14 @@ static ssize_t show_##name(struct device *_dev,
\
\
return sprintf(buf, "%d\n", atomic_read(&dev->name)); \
} \
-static DEVICE_ATTR(name, 0444, show_##name, NULL)
+static DEVICE_ATTR_RO(name)
XENBUS_SHOW_STAT(event_channels);
XENBUS_SHOW_STAT(events);
XENBUS_SHOW_STAT(spurious_events);
XENBUS_SHOW_STAT(jiffies_eoi_delayed);
-static ssize_t show_spurious_threshold(struct device *_dev,
+static ssize_t spurious_threshold_show(struct device *_dev,
struct device_attribute *attr,
char *buf)
{
@@ -231,9 +231,9 @@ static ssize_t show_spurious_threshold(struct device *_dev,
return sprintf(buf, "%d\n", dev->spurious_threshold);
}
-static ssize_t set_spurious_threshold(struct device *_dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
+static ssize_t spurious_threshold_store(struct device *_dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
{
struct xenbus_device *dev = to_xenbus_device(_dev);
unsigned int val;
@@ -248,8 +248,7 @@ static ssize_t set_spurious_threshold(struct device *_dev,
return count;
}
-static DEVICE_ATTR(spurious_threshold, 0644, show_spurious_threshold,
- set_spurious_threshold);
+static DEVICE_ATTR_RW(spurious_threshold);
static struct attribute *xenbus_attrs[] = {
&dev_attr_event_channels.attr,
--
2.17.1
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