driver-core: Add attribute argument to class_attribute show/store

Passing the attribute to the low level IO functions allows all kinds
of cleanups, by sharing low level IO code without requiring
an own function for every piece of data.

Also drivers can extend the attributes with own data fields
and use that in the low level function.

This makes the class attributes the same as sysdev_class attributes
and plain attributes.

This will allow further cleanups in drivers.

Full tree sweep converting all users.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

3 files changed, 9 insertions, 3 deletions

diff --git a/drivers/infiniband/core/ucm.c b/drivers/infiniband/core/ucm.c
index 1b09b73..02e209f 100644
--- a/drivers/infiniband/core/ucm.c
+++ b/drivers/infiniband/core/ucm.c
@@ -1336,7 +1336,9 @@ static void ib_ucm_remove_one(struct ib_device *device)
 	device_unregister(&ucm_dev->dev);
 }
 
-static ssize_t show_abi_version(struct class *class, char *buf)
+static ssize_t show_abi_version(struct class *class,
+				struct class_attribute *attr,
+				char *buf)
 {
 	return sprintf(buf, "%d\n", IB_USER_CM_ABI_VERSION);
 }
diff --git a/drivers/infiniband/core/user_mad.c b/drivers/infiniband/core/user_mad.c
index 02d360c..d0de8f2 100644
--- a/drivers/infiniband/core/user_mad.c
+++ b/drivers/infiniband/core/user_mad.c
@@ -965,7 +965,9 @@ static ssize_t show_port(struct device *dev, struct device_attribute *attr,
 }
 static DEVICE_ATTR(port, S_IRUGO, show_port, NULL);
 
-static ssize_t show_abi_version(struct class *class, char *buf)
+static ssize_t show_abi_version(struct class *class,
+				struct class_attribute *attr,
+				char *buf)
 {
 	return sprintf(buf, "%d\n", IB_USER_MAD_ABI_VERSION);
 }
diff --git a/drivers/infiniband/core/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c
index 4fa2e65..6087939 100644
--- a/drivers/infiniband/core/uverbs_main.c
+++ b/drivers/infiniband/core/uverbs_main.c
@@ -691,7 +691,9 @@ static ssize_t show_dev_abi_version(struct device *device,
 }
 static DEVICE_ATTR(abi_version, S_IRUGO, show_dev_abi_version, NULL);
 
-static ssize_t show_abi_version(struct class *class, char *buf)
+static ssize_t show_abi_version(struct class *class,
+				struct class_attribute *attr,
+				char *buf)
 {
 	return sprintf(buf, "%d\n", IB_USER_VERBS_ABI_VERSION);
 }