[PATCH linux-next] null_blk: use sysfs_emit() to instead of scnprintf()

[yexingchen116]

From: ye xingchen <ye.xingchen@xxxxxxxxxx>

Replace the open-code with sysfs_emit() to simplify the code.

Signed-off-by: ye xingchen <ye.xingchen@xxxxxxxxxx>
---
 drivers/block/null_blk/main.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/block/null_blk/main.c b/drivers/block/null_blk/main.c
index 1f154f92f4c2..5317ef2ba227 100644
--- a/drivers/block/null_blk/main.c
+++ b/drivers/block/null_blk/main.c
@@ -255,18 +255,18 @@ static inline struct nullb_device *to_nullb_device(struct config_item *item)
 
 static inline ssize_t nullb_device_uint_attr_show(unsigned int val, char *page)
 {
-	return snprintf(page, PAGE_SIZE, "%u\n", val);
+	return sysfs_emit(page, "%u\n", val);
 }
 
 static inline ssize_t nullb_device_ulong_attr_show(unsigned long val,
 	char *page)
 {
-	return snprintf(page, PAGE_SIZE, "%lu\n", val);
+	return sysfs_emit(page, "%lu\n", val);
 }
 
 static inline ssize_t nullb_device_bool_attr_show(bool val, char *page)
 {
-	return snprintf(page, PAGE_SIZE, "%u\n", val);
+	return sysfs_emit(page, "%u\n", val);
 }
 
 static ssize_t nullb_device_uint_attr_store(unsigned int *val,
-- 
2.25.1