Per Documentation/filesystems/sysfs.rst, show() should only use sysfs_emit() or sysfs_emit_at() when formatting the value to be returned to user space. No functional change intended. Signed-off-by: zhangguopeng <zhangguopeng@xxxxxxxxxx> Suggested-by: Christoph Hellwig <hch@xxxxxx> --- v2: keep the \ aligned for all the multi-line macros,as Suggested by https://lore.kernel.org/all/20241107054420.GA2336@xxxxxx/ --- block/blk-sysfs.c | 24 ++++++++++++------------ block/genhd.c | 30 +++++++++++++++--------------- 2 files changed, 27 insertions(+), 27 deletions(-) diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index d9f22122ae2f..d80a202cd170 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -30,7 +30,7 @@ struct queue_sysfs_entry { static ssize_t queue_var_show(unsigned long var, char *page) { - return sprintf(page, "%lu\n", var); + return sysfs_emit(page, "%lu\n", var); } static ssize_t @@ -121,7 +121,7 @@ QUEUE_SYSFS_LIMIT_SHOW(atomic_write_unit_max) #define QUEUE_SYSFS_LIMIT_SHOW_SECTORS_TO_BYTES(_field) \ static ssize_t queue_##_field##_show(struct gendisk *disk, char *page) \ { \ - return sprintf(page, "%llu\n", \ + return sysfs_emit(page, "%llu\n", \ (unsigned long long)disk->queue->limits._field << \ SECTOR_SHIFT); \ } @@ -145,7 +145,7 @@ QUEUE_SYSFS_LIMIT_SHOW_SECTORS_TO_KB(max_hw_sectors) #define QUEUE_SYSFS_SHOW_CONST(_name, _val) \ static ssize_t queue_##_name##_show(struct gendisk *disk, char *page) \ { \ - return sprintf(page, "%d\n", _val); \ + return sysfs_emit(page, "%d\n", _val); \ } /* deprecated fields */ @@ -224,7 +224,7 @@ static ssize_t queue_feature_store(struct gendisk *disk, const char *page, #define QUEUE_SYSFS_FEATURE(_name, _feature) \ static ssize_t queue_##_name##_show(struct gendisk *disk, char *page) \ { \ - return sprintf(page, "%u\n", \ + return sysfs_emit(page, "%u\n", \ !!(disk->queue->limits.features & _feature)); \ } \ static ssize_t queue_##_name##_store(struct gendisk *disk, \ @@ -241,7 +241,7 @@ QUEUE_SYSFS_FEATURE(stable_writes, BLK_FEAT_STABLE_WRITES); #define QUEUE_SYSFS_FEATURE_SHOW(_name, _feature) \ static ssize_t queue_##_name##_show(struct gendisk *disk, char *page) \ { \ - return sprintf(page, "%u\n", \ + return sysfs_emit(page, "%u\n", \ !!(disk->queue->limits.features & _feature)); \ } @@ -252,8 +252,8 @@ QUEUE_SYSFS_FEATURE_SHOW(dax, BLK_FEAT_DAX); static ssize_t queue_zoned_show(struct gendisk *disk, char *page) { if (blk_queue_is_zoned(disk->queue)) - return sprintf(page, "host-managed\n"); - return sprintf(page, "none\n"); + return sysfs_emit(page, "host-managed\n"); + return sysfs_emit(page, "none\n"); } static ssize_t queue_nr_zones_show(struct gendisk *disk, char *page) @@ -366,7 +366,7 @@ static ssize_t queue_poll_store(struct gendisk *disk, const char *page, static ssize_t queue_io_timeout_show(struct gendisk *disk, char *page) { - return sprintf(page, "%u\n", jiffies_to_msecs(disk->queue->rq_timeout)); + return sysfs_emit(page, "%u\n", jiffies_to_msecs(disk->queue->rq_timeout)); } static ssize_t queue_io_timeout_store(struct gendisk *disk, const char *page, @@ -387,8 +387,8 @@ static ssize_t queue_io_timeout_store(struct gendisk *disk, const char *page, static ssize_t queue_wc_show(struct gendisk *disk, char *page) { if (blk_queue_write_cache(disk->queue)) - return sprintf(page, "write back\n"); - return sprintf(page, "write through\n"); + return sysfs_emit(page, "write back\n"); + return sysfs_emit(page, "write through\n"); } static ssize_t queue_wc_store(struct gendisk *disk, const char *page, @@ -519,9 +519,9 @@ static ssize_t queue_wb_lat_show(struct gendisk *disk, char *page) return -EINVAL; if (wbt_disabled(disk->queue)) - return sprintf(page, "0\n"); + return sysfs_emit(page, "0\n"); - return sprintf(page, "%llu\n", + return sysfs_emit(page, "%llu\n", div_u64(wbt_get_min_lat(disk->queue), 1000)); } diff --git a/block/genhd.c b/block/genhd.c index dfee66146bd1..1971c91d6f72 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -783,7 +783,7 @@ static ssize_t disk_badblocks_show(struct device *dev, struct gendisk *disk = dev_to_disk(dev); if (!disk->bb) - return sprintf(page, "\n"); + return sysfs_emit(page, "\n"); return badblocks_show(disk->bb, page, 0); } @@ -931,7 +931,7 @@ static ssize_t disk_range_show(struct device *dev, { struct gendisk *disk = dev_to_disk(dev); - return sprintf(buf, "%d\n", disk->minors); + return sysfs_emit(buf, "%d\n", disk->minors); } static ssize_t disk_ext_range_show(struct device *dev, @@ -939,7 +939,7 @@ static ssize_t disk_ext_range_show(struct device *dev, { struct gendisk *disk = dev_to_disk(dev); - return sprintf(buf, "%d\n", + return sysfs_emit(buf, "%d\n", (disk->flags & GENHD_FL_NO_PART) ? 1 : DISK_MAX_PARTS); } @@ -948,7 +948,7 @@ static ssize_t disk_removable_show(struct device *dev, { struct gendisk *disk = dev_to_disk(dev); - return sprintf(buf, "%d\n", + return sysfs_emit(buf, "%d\n", (disk->flags & GENHD_FL_REMOVABLE ? 1 : 0)); } @@ -957,7 +957,7 @@ static ssize_t disk_hidden_show(struct device *dev, { struct gendisk *disk = dev_to_disk(dev); - return sprintf(buf, "%d\n", + return sysfs_emit(buf, "%d\n", (disk->flags & GENHD_FL_HIDDEN ? 1 : 0)); } @@ -966,13 +966,13 @@ static ssize_t disk_ro_show(struct device *dev, { struct gendisk *disk = dev_to_disk(dev); - return sprintf(buf, "%d\n", get_disk_ro(disk) ? 1 : 0); + return sysfs_emit(buf, "%d\n", get_disk_ro(disk) ? 1 : 0); } ssize_t part_size_show(struct device *dev, struct device_attribute *attr, char *buf) { - return sprintf(buf, "%llu\n", bdev_nr_sectors(dev_to_bdev(dev))); + return sysfs_emit(buf, "%llu\n", bdev_nr_sectors(dev_to_bdev(dev))); } ssize_t part_stat_show(struct device *dev, @@ -989,7 +989,7 @@ ssize_t part_stat_show(struct device *dev, part_stat_unlock(); } part_stat_read_all(bdev, &stat); - return sprintf(buf, + return sysfs_emit(buf, "%8lu %8lu %8llu %8u " "%8lu %8lu %8llu %8u " "%8u %8u %8u " @@ -1031,14 +1031,14 @@ ssize_t part_inflight_show(struct device *dev, struct device_attribute *attr, else part_in_flight_rw(bdev, inflight); - return sprintf(buf, "%8u %8u\n", inflight[0], inflight[1]); + return sysfs_emit(buf, "%8u %8u\n", inflight[0], inflight[1]); } static ssize_t disk_capability_show(struct device *dev, struct device_attribute *attr, char *buf) { dev_warn_once(dev, "the capability attribute has been deprecated.\n"); - return sprintf(buf, "0\n"); + return sysfs_emit(buf, "0\n"); } static ssize_t disk_alignment_offset_show(struct device *dev, @@ -1047,7 +1047,7 @@ static ssize_t disk_alignment_offset_show(struct device *dev, { struct gendisk *disk = dev_to_disk(dev); - return sprintf(buf, "%d\n", bdev_alignment_offset(disk->part0)); + return sysfs_emit(buf, "%d\n", bdev_alignment_offset(disk->part0)); } static ssize_t disk_discard_alignment_show(struct device *dev, @@ -1056,7 +1056,7 @@ static ssize_t disk_discard_alignment_show(struct device *dev, { struct gendisk *disk = dev_to_disk(dev); - return sprintf(buf, "%d\n", bdev_alignment_offset(disk->part0)); + return sysfs_emit(buf, "%d\n", bdev_alignment_offset(disk->part0)); } static ssize_t diskseq_show(struct device *dev, @@ -1064,13 +1064,13 @@ static ssize_t diskseq_show(struct device *dev, { struct gendisk *disk = dev_to_disk(dev); - return sprintf(buf, "%llu\n", disk->diskseq); + return sysfs_emit(buf, "%llu\n", disk->diskseq); } static ssize_t partscan_show(struct device *dev, struct device_attribute *attr, char *buf) { - return sprintf(buf, "%u\n", disk_has_partscan(dev_to_disk(dev))); + return sysfs_emit(buf, "%u\n", disk_has_partscan(dev_to_disk(dev))); } static DEVICE_ATTR(range, 0444, disk_range_show, NULL); @@ -1092,7 +1092,7 @@ static DEVICE_ATTR(partscan, 0444, partscan_show, NULL); ssize_t part_fail_show(struct device *dev, struct device_attribute *attr, char *buf) { - return sprintf(buf, "%d\n", + return sysfs_emit(buf, "%d\n", bdev_test_flag(dev_to_bdev(dev), BD_MAKE_IT_FAIL)); } -- 2.25.1
