[PATCH -next] RDMA/core: use DEVICE_ATTR_RO macro

[YueHaibing]

Use DEVICE_ATTR_RO() helper instead of plain DEVICE_ATTR(),
which makes the code a bit shorter and easier to read.

Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx>
---
 drivers/infiniband/core/ucma.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/infiniband/core/ucma.c b/drivers/infiniband/core/ucma.c
index 1f198c180aa1..74144e513dc7 100644
--- a/drivers/infiniband/core/ucma.c
+++ b/drivers/infiniband/core/ucma.c
@@ -1830,13 +1830,13 @@ static struct ib_client rdma_cma_client = {
 };
 MODULE_ALIAS_RDMA_CLIENT("rdma_cm");
 
-static ssize_t show_abi_version(struct device *dev,
+static ssize_t abi_version_show(struct device *dev,
 				struct device_attribute *attr,
 				char *buf)
 {
 	return sysfs_emit(buf, "%d\n", RDMA_USER_CM_ABI_VERSION);
 }
-static DEVICE_ATTR(abi_version, S_IRUGO, show_abi_version, NULL);
+static DEVICE_ATTR_RO(abi_version);
 
 static int __init ucma_init(void)
 {
-- 
2.17.1