f2fs: use sysfs_emit instead of sprintf

Let's use sysfs_emit.

Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/sysfs.c

@@ -95,28 +95,28 @@ static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type)
 static ssize_t dirty_segments_show(struct f2fs_attr *a,
 		struct f2fs_sb_info *sbi, char *buf)
 {
-	return sprintf(buf, "%llu\n",
+	return sysfs_emit(buf, "%llu\n",
 			(unsigned long long)(dirty_segments(sbi)));
 }
 
 static ssize_t free_segments_show(struct f2fs_attr *a,
 		struct f2fs_sb_info *sbi, char *buf)
 {
-	return sprintf(buf, "%llu\n",
+	return sysfs_emit(buf, "%llu\n",
 			(unsigned long long)(free_segments(sbi)));
 }
 
 static ssize_t ovp_segments_show(struct f2fs_attr *a,
 		struct f2fs_sb_info *sbi, char *buf)
 {
-	return sprintf(buf, "%llu\n",
+	return sysfs_emit(buf, "%llu\n",
 			(unsigned long long)(overprovision_segments(sbi)));
 }
 
 static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
 		struct f2fs_sb_info *sbi, char *buf)
 {
-	return sprintf(buf, "%llu\n",
+	return sysfs_emit(buf, "%llu\n",
 			(unsigned long long)(sbi->kbytes_written +
 			((f2fs_get_sectors_written(sbi) -
 				sbi->sectors_written_start) >> 1)));
@@ -125,13 +125,13 @@ static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
 static ssize_t sb_status_show(struct f2fs_attr *a,
 		struct f2fs_sb_info *sbi, char *buf)
 {
-	return sprintf(buf, "%lx\n", sbi->s_flag);
+	return sysfs_emit(buf, "%lx\n", sbi->s_flag);
 }
 
 static ssize_t cp_status_show(struct f2fs_attr *a,
 		struct f2fs_sb_info *sbi, char *buf)
 {
-	return sprintf(buf, "%x\n", le32_to_cpu(F2FS_CKPT(sbi)->ckpt_flags));
+	return sysfs_emit(buf, "%x\n", le32_to_cpu(F2FS_CKPT(sbi)->ckpt_flags));
 }
 
 static ssize_t pending_discard_show(struct f2fs_attr *a,
@@ -139,7 +139,7 @@ static ssize_t pending_discard_show(struct f2fs_attr *a,
 {
 	if (!SM_I(sbi)->dcc_info)
 		return -EINVAL;
-	return sprintf(buf, "%llu\n", (unsigned long long)atomic_read(
+	return sysfs_emit(buf, "%llu\n", (unsigned long long)atomic_read(
 				&SM_I(sbi)->dcc_info->discard_cmd_cnt));
 }
 
@@ -205,7 +205,7 @@ static ssize_t features_show(struct f2fs_attr *a,
 static ssize_t current_reserved_blocks_show(struct f2fs_attr *a,
 					struct f2fs_sb_info *sbi, char *buf)
 {
-	return sprintf(buf, "%u\n", sbi->current_reserved_blocks);
+	return sysfs_emit(buf, "%u\n", sbi->current_reserved_blocks);
 }
 
 static ssize_t unusable_show(struct f2fs_attr *a,
@@ -217,7 +217,7 @@ static ssize_t unusable_show(struct f2fs_attr *a,
 		unusable = sbi->unusable_block_count;
 	else
 		unusable = f2fs_get_unusable_blocks(sbi);
-	return sprintf(buf, "%llu\n", (unsigned long long)unusable);
+	return sysfs_emit(buf, "%llu\n", (unsigned long long)unusable);
 }
 
 static ssize_t encoding_show(struct f2fs_attr *a,
@@ -232,13 +232,13 @@ static ssize_t encoding_show(struct f2fs_attr *a,
 			(sb->s_encoding->version >> 8) & 0xff,
 			sb->s_encoding->version & 0xff);
 #endif
-	return sprintf(buf, "(none)");
+	return sysfs_emit(buf, "(none)");
 }
 
 static ssize_t mounted_time_sec_show(struct f2fs_attr *a,
 		struct f2fs_sb_info *sbi, char *buf)
 {
-	return sprintf(buf, "%llu", SIT_I(sbi)->mounted_time);
+	return sysfs_emit(buf, "%llu", SIT_I(sbi)->mounted_time);
 }
 
 #ifdef CONFIG_F2FS_STAT_FS
@@ -247,7 +247,7 @@ static ssize_t moved_blocks_foreground_show(struct f2fs_attr *a,
 {
 	struct f2fs_stat_info *si = F2FS_STAT(sbi);
 
-	return sprintf(buf, "%llu\n",
+	return sysfs_emit(buf, "%llu\n",
 		(unsigned long long)(si->tot_blks -
 			(si->bg_data_blks + si->bg_node_blks)));
 }
@@ -257,7 +257,7 @@ static ssize_t moved_blocks_background_show(struct f2fs_attr *a,
 {
 	struct f2fs_stat_info *si = F2FS_STAT(sbi);
 
-	return sprintf(buf, "%llu\n",
+	return sysfs_emit(buf, "%llu\n",
 		(unsigned long long)(si->bg_data_blks + si->bg_node_blks));
 }
 
@@ -268,7 +268,7 @@ static ssize_t avg_vblocks_show(struct f2fs_attr *a,
 
 	si->dirty_count = dirty_segments(sbi);
 	f2fs_update_sit_info(sbi);
-	return sprintf(buf, "%llu\n", (unsigned long long)(si->avg_vblocks));
+	return sysfs_emit(buf, "%llu\n", (unsigned long long)(si->avg_vblocks));
 }
 #endif
 
@@ -363,7 +363,7 @@ static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
 
 	ui = (unsigned int *)(ptr + a->offset);
 
-	return sprintf(buf, "%u\n", *ui);
+	return sysfs_emit(buf, "%u\n", *ui);
 }
 
 static ssize_t __sbi_store(struct f2fs_attr *a,
@@ -728,7 +728,7 @@ static void f2fs_sb_release(struct kobject *kobj)
 static ssize_t f2fs_feature_show(struct f2fs_attr *a,
 		struct f2fs_sb_info *sbi, char *buf)
 {
-	return sprintf(buf, "supported\n");
+	return sysfs_emit(buf, "supported\n");
 }
 
 #define F2FS_FEATURE_RO_ATTR(_name)				\
@@ -741,8 +741,8 @@ static ssize_t f2fs_sb_feature_show(struct f2fs_attr *a,
 		struct f2fs_sb_info *sbi, char *buf)
 {
 	if (F2FS_HAS_FEATURE(sbi, a->id))
-		return sprintf(buf, "supported\n");
+		return sysfs_emit(buf, "supported\n");
-	return sprintf(buf, "unsupported\n");
+	return sysfs_emit(buf, "unsupported\n");
 }
 
 #define F2FS_SB_FEATURE_RO_ATTR(_name, _feat)			\