linux-kernel - [PATCH] f2fs: convert to use sysfs

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Date:   Fri, 31 Mar 2023 19:33:05 +0800
From:   Yangtao Li <frank.li@...o.com>
To:     Jaegeuk Kim <jaegeuk@...nel.org>, Chao Yu <chao@...nel.org>
Cc:     Yangtao Li <frank.li@...o.com>,
        linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org
Subject: [PATCH] f2fs: convert to use sysfs_emit

Let's use sysfs_emit.

Signed-off-by: Yangtao Li <frank.li@...o.com>
---
 fs/f2fs/sysfs.c | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
index 9ddc6ee19433..2c0b2cb05a3a 100644
--- a/fs/f2fs/sysfs.c
+++ b/fs/f2fs/sysfs.c
@@ -312,19 +312,13 @@ 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
-- 
2.35.1