OProfile: Rework string handling in setup_ibs_files()

Signed-off-by: Robert Richter <robert.richter@amd.com>

arch/x86/oprofile/op_model_amd.c

@@ -473,7 +473,6 @@ static int (*create_arch_files)(struct super_block * sb, struct dentry * root);
 
 static int setup_ibs_files(struct super_block * sb, struct dentry * root)
 {
-	char buf[12];
 	struct dentry *dir;
 	int ret = 0;
 
@@ -495,16 +494,16 @@ static int setup_ibs_files(struct super_block * sb, struct dentry * root)
 	ibs_config.max_cnt_op = 250000;
 	ibs_config.op_enabled = 0;
 	ibs_config.dispatched_ops = 1;
-	snprintf(buf,  sizeof(buf), "ibs_fetch");
-	dir = oprofilefs_mkdir(sb, root, buf);
-	oprofilefs_create_ulong(sb, dir, "rand_enable",
-				&ibs_config.rand_en);
+
+	dir = oprofilefs_mkdir(sb, root, "ibs_fetch");
 	oprofilefs_create_ulong(sb, dir, "enable",
 				&ibs_config.fetch_enabled);
 	oprofilefs_create_ulong(sb, dir, "max_count",
 				&ibs_config.max_cnt_fetch);
-	snprintf(buf,  sizeof(buf), "ibs_uops");
-	dir = oprofilefs_mkdir(sb, root, buf);
+	oprofilefs_create_ulong(sb, dir, "rand_enable",
+				&ibs_config.rand_en);
+
+	dir = oprofilefs_mkdir(sb, root, "ibs_uops");
 	oprofilefs_create_ulong(sb, dir, "enable",
 				&ibs_config.op_enabled);
 	oprofilefs_create_ulong(sb, dir, "max_count",