[PATCH v2 5/5]nbd: use device_attr macros for sysfs attribute

[Pranay Kr. Srivastava]

This patch changes the pid sysfs device attribute to use
DEVICE_ATTR_* macro.

Signed-off-by: Pranay Kr. Srivastava <pran...@gmail.com>
---
 drivers/block/nbd.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 4da40dc..323ab26 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -449,10 +449,8 @@ static ssize_t pid_show(struct device *dev,
        return sprintf(buf, "%d\n", task_pid_nr(nbd->task_recv));
 }
 
-static struct device_attribute pid_attr = {
-       .attr = { .name = "pid", .mode = S_IRUGO},
-       .show = pid_show,
-};
+
+static DEVICE_ATTR_RO(pid);
 
 static int nbd_thread_recv(struct nbd_device *nbd, struct block_device *bdev)
 {
@@ -465,7 +463,7 @@ static int nbd_thread_recv(struct nbd_device *nbd, struct 
block_device *bdev)
 
        nbd->task_recv = current;
 
-       ret = device_create_file(disk_to_dev(nbd->disk), &pid_attr);
+       ret = device_create_file(disk_to_dev(nbd->disk), &dev_attr_pid);
        if (ret) {
                dev_err(disk_to_dev(nbd->disk), "device_create_file failed!\n");
 
@@ -488,7 +486,7 @@ static int nbd_thread_recv(struct nbd_device *nbd, struct 
block_device *bdev)
 
        nbd_size_clear(nbd, bdev);
 
-       device_remove_file(disk_to_dev(nbd->disk), &pid_attr);
+       device_remove_file(disk_to_dev(nbd->disk), &dev_attr_pid);
 
        nbd->task_recv = NULL;
 
-- 
2.6.2