oprofilefs_create_...() do not need superblock argument

same story as with oprofilefs_mkdir()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/drivers/oprofile/oprofile_perf.c b/drivers/oprofile/oprofile_perf.c
index 923a245..d5b2732 100644
--- a/drivers/oprofile/oprofile_perf.c
+++ b/drivers/oprofile/oprofile_perf.c
@@ -148,12 +148,12 @@
 
 		snprintf(buf, sizeof buf, "%d", i);
 		dir = oprofilefs_mkdir(root, buf);
-		oprofilefs_create_ulong(root->d_sb, dir, "enabled", &counter_config[i].enabled);
-		oprofilefs_create_ulong(root->d_sb, dir, "event", &counter_config[i].event);
-		oprofilefs_create_ulong(root->d_sb, dir, "count", &counter_config[i].count);
-		oprofilefs_create_ulong(root->d_sb, dir, "unit_mask", &counter_config[i].unit_mask);
-		oprofilefs_create_ulong(root->d_sb, dir, "kernel", &counter_config[i].kernel);
-		oprofilefs_create_ulong(root->d_sb, dir, "user", &counter_config[i].user);
+		oprofilefs_create_ulong(dir, "enabled", &counter_config[i].enabled);
+		oprofilefs_create_ulong(dir, "event", &counter_config[i].event);
+		oprofilefs_create_ulong(dir, "count", &counter_config[i].count);
+		oprofilefs_create_ulong(dir, "unit_mask", &counter_config[i].unit_mask);
+		oprofilefs_create_ulong(dir, "kernel", &counter_config[i].kernel);
+		oprofilefs_create_ulong(dir, "user", &counter_config[i].user);
 	}
 
 	return 0;