Split fmt_devnum out from devnum2devname

Sometimes we want to convert a devnum to a devname without allocating
memory.  So provide function to do the formatting without allocation.

Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 1 insertions, 5 deletions

diff --git a/sysfs.c b/sysfs.c
index 7a0403d6..a9ece82b 100644
--- a/sysfs.c
+++ b/sysfs.c
@@ -90,11 +90,7 @@ void sysfs_init(struct mdinfo *mdi, int fd, int devnum)
 	}
 	if (devnum == NoMdDev)
 		return;
-	if (devnum >= 0)
-		sprintf(mdi->sys_name, "md%d", devnum);
-	else
-		sprintf(mdi->sys_name, "md_d%d",
-			-1-devnum);
+	fmt_devname(mdi->sys_name, devnum);
 }