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dm: sysfs: use sysfs_emit() in dm-sysfs.c

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Replace sprintf()+strlen() with sysfs_emit(), the preferred helper for
sysfs show() routines. sysfs_emit() returns the number of bytes written,
guarantees NUL-termination, and clamps to PAGE_SIZE-1.

Reference: Documentation/filesystems/sysfs.rst.

No functional change intended.

Signed-off-by: Vivek BalachandharTN <vivek.balachandhar@gmail.com>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
This commit is contained in:
Vivek BalachandharTN
2025-10-15 07:45:02 +00:00
committed by Mikulas Patocka
parent 27cecacbe8
commit 4929ba5c5b
1 changed files with 2 additions and 6 deletions
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8
drivers/md/dm-sysfs.c
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@@ -86,17 +86,13 @@ static ssize_t dm_attr_uuid_show(struct mapped_device *md, char *buf)
static ssize_t dm_attr_suspended_show(struct mapped_device *md, char *buf)
{
sprintf(buf, "%d\n", dm_suspended_md(md));
return strlen(buf);
return sysfs_emit(buf, "%d\n", dm_suspended_md(md));
}
static ssize_t dm_attr_use_blk_mq_show(struct mapped_device *md, char *buf)
{
/* Purely for userspace compatibility */
sprintf(buf, "%d\n", true);
return strlen(buf);
return sysfs_emit(buf, "%d\n", true);
}
static DM_ATTR_RO(name);