[Devel] [PATCH RH9] ploop: simplify ploop_status

[Cyrill Gorcunov]

From: Cyrill Gorcunov <gorcunov at gmail.com>

We can get rid of sprintf usage when encoding the status.
Just fill the string directly.

Cc: Kirill Tkhai <ktkhai at virtuozzo.com>
Signed-off-by: Cyrill Gorcunov <gorcunov at gmail.com>
---
 drivers/md/dm-ploop-target.c |   13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

--- vzkernel.orig/drivers/md/dm-ploop-target.c
+++ vzkernel/drivers/md/dm-ploop-target.c
@@ -435,20 +435,21 @@ static void ploop_status(struct dm_targe
 			 unsigned int maxlen)
 {
 	struct ploop *ploop = ti->private;
-	char stat[16] = { 0 }, *p = stat;
+	char stat[16], *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';
+	*p++ = '\0';
 	up_read(&ploop->ctl_rwsem);
 
 	BUG_ON(p - stat >= sizeof(stat));