From 5fe51934b1cd94a75007dd456fecc2ff6ee622e7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= <clg@redhat.com>
Date: Wed, 25 Oct 2023 12:12:44 +0200
Subject: [PATCH] util/uuid: Define UUID_STR_LEN from UUID_NONE string
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Cc: Fam Zheng <fam@euphon.net>
Suggested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
 include/qemu/uuid.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/include/qemu/uuid.h b/include/qemu/uuid.h
index 356efe7b57..869f84af09 100644
--- a/include/qemu/uuid.h
+++ b/include/qemu/uuid.h
@@ -78,9 +78,10 @@ typedef struct {
                  "%02hhx%02hhx-" \
                  "%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx"
 
-#define UUID_STR_LEN (36 + 1)
-
 #define UUID_NONE "00000000-0000-0000-0000-000000000000"
+QEMU_BUILD_BUG_ON(sizeof(UUID_NONE) - 1 != 36);
+
+#define UUID_STR_LEN sizeof(UUID_NONE)
 
 void qemu_uuid_generate(QemuUUID *out);