[RFC PATCH 01/41] uuid: move uuid_t and guid_t into <linux/uuid_types.h>
flat view
WARM2d
From: Jan Koester <hidden>
Date: 2026-10-18 18:01:38
Also in:
keyrings, linux-arch, linux-cifs, linux-ext4, linux-fsdevel, linux-nfs, linux-security-module, lkml, netdev
Subsystem:
the rest, uuid helpers · Maintainer:
Linus Torvalds
<linux/uuid.h> pulls in <linux/string.h> for its helpers, which makes it unusable from headers low in the include chain. The next patches embed UUIDs and GUIDs in kuid_t and kgid_t, whose <linux/uidgid_types.h> is included by <linux/sched.h>. Move the two types and UUID_SIZE into a header of their own that only needs <linux/types.h>. <linux/uuid.h> includes it, so no user changes. No functional change. Assisted-by: Claude:claude-opus-5-5 Signed-off-by: Jan Koester <redacted> --- include/linux/uuid.h | 11 +---------- include/linux/uuid_types.h | 21 +++++++++++++++++++++ 2 files changed, 22 insertions(+), 10 deletions(-) create mode 100644 include/linux/uuid_types.h
diff --git a/include/linux/uuid.h b/include/linux/uuid.h
index 43d4a79b27..cbdaf0ca45 100644
--- a/include/linux/uuid.h
+++ b/include/linux/uuid.h@@ -9,16 +9,7 @@ #define _LINUX_UUID_H_ #include <linux/string.h> - -#define UUID_SIZE 16 - -typedef struct { - __u8 b[UUID_SIZE]; -} guid_t; - -typedef struct { - __u8 b[UUID_SIZE]; -} uuid_t; +#include <linux/uuid_types.h> #define GUID_INIT(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \ ((guid_t) \
diff --git a/include/linux/uuid_types.h b/include/linux/uuid_types.h
new file mode 100644
index 0000000000..1e45b69571
--- /dev/null
+++ b/include/linux/uuid_types.h@@ -0,0 +1,21 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * UUID/GUID types, without the helpers of <linux/uuid.h>, for headers + * low in the include chain (such as <linux/uidgid_types.h>) + */ +#ifndef _LINUX_UUID_TYPES_H_ +#define _LINUX_UUID_TYPES_H_ + +#include <linux/types.h> + +#define UUID_SIZE 16 + +typedef struct { + __u8 b[UUID_SIZE]; +} guid_t; + +typedef struct { + __u8 b[UUID_SIZE]; +} uuid_t; + +#endif /* _LINUX_UUID_TYPES_H_ */
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2.56.0