f2fs: convert to use sysfs_emit

Let's use sysfs_emit.

Signed-off-by: Yangtao Li <frank.li@vivo.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
index fefc6b728590b60706e2bad1a3abfd07181b9a2c..aa77dd7c4555efc4e577ed388afa91b98ebc9651 100644 (file)
--- a/fs/f2fs/sysfs.c
+++ b/fs/f2fs/sysfs.c
@@ -312,19 +312,14 @@ static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
 
        if (!strcmp(a->attr.name, "ckpt_thread_ioprio")) {
                struct ckpt_req_control *cprc = &sbi->cprc_info;
-               int len = 0;
                int class = IOPRIO_PRIO_CLASS(cprc->ckpt_thread_ioprio);
                int data = IOPRIO_PRIO_DATA(cprc->ckpt_thread_ioprio);
 
-               if (class == IOPRIO_CLASS_RT)
-                       len += scnprintf(buf + len, PAGE_SIZE - len, "rt,");
-               else if (class == IOPRIO_CLASS_BE)
-                       len += scnprintf(buf + len, PAGE_SIZE - len, "be,");
-               else
+               if (class != IOPRIO_CLASS_RT && class != IOPRIO_CLASS_BE)
                        return -EINVAL;
 
-               len += scnprintf(buf + len, PAGE_SIZE - len, "%d\n", data);
-               return len;
+               return sysfs_emit(buf, "%s,%d\n",
+                       class == IOPRIO_CLASS_RT ? "rt" : "be", data);
        }
 
 #ifdef CONFIG_F2FS_FS_COMPRESSION