[Devel] [PATCH RHEL9 COMMIT] ploop: simplify ploop_status

[Konstantin Khorenko]

The commit is pushed to "branch-rh9-5.14.vz9.1.x-ovz" and will appear at https://src.openvz.org/scm/ovz/vzkernel.git
after rh9-5.14.0-4.vz9.10.17
------>
commit 31f8f226e2d73defb45dafff9cb69f6d6752a344
Author: Cyrill Gorcunov <gorcunov at gmail.com>
Date:   Tue Oct 26 20:33:18 2021 +0300

    ploop: simplify ploop_status
    
    We can get rid of sprintf usage when encoding the status.
    Just fill the string directly.
    
    Signed-off-by: Cyrill Gorcunov <gorcunov at gmail.com>
    Acked-by: Kirill TKhai <ktkhai at virtuozzo.com>
---
 drivers/md/dm-ploop-target.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/md/dm-ploop-target.c b/drivers/md/dm-ploop-target.c
index bd68d5fb272b..0d693ccd387d 100644
--- a/drivers/md/dm-ploop-target.c
+++ b/drivers/md/dm-ploop-target.c
@@ -445,22 +445,23 @@ static void ploop_status(struct dm_target *ti, status_type_t type,
 			 unsigned int maxlen)
 {
 	struct ploop *ploop = ti->private;
-	char stat[32] = { 0 }, *p = stat;
+	char stat[32], *p = stat;
 	ssize_t sz = 0;
 
 	down_read(&ploop->ctl_rwsem);
 	if (ploop->falloc_new_clu)
-		p += sprintf(p, "f");
+		*p++ = 'f';
 	if (ploop->tracking_bitmap)
-		p += sprintf(p, "t");
+		*p++ = 't';
 	if (READ_ONCE(ploop->noresume))
-		p += sprintf(p, "n");
+		*p++ = 'n';
 	if (READ_ONCE(ploop->event_enospc))
-		p += sprintf(p, "s");
+		*p++ = 's';
 	if (p == stat)
-		p += sprintf(p, "o");
+		*p++ = 'o';
 	if (ploop->skip_off)
 		p += sprintf(p, " off=%llu", ploop->skip_off);
+	*p++ = '\0';
 	up_read(&ploop->ctl_rwsem);
 
 	BUG_ON(p - stat >= sizeof(stat));