header: add uuid backports

This backports the following upstream commits:
f9727a17db9: ("uuid: rename uuid types")
df33767d9fe: ("uuid: hoist helpers uuid_equal() and uuid_copy() from xfs")

ath10k now makes use of them.

Some parts should go into the uapi/linux/uuid.h file, but
then #include_next hack is not working correctly any more, so place it
all into the normal file.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/backport/backport-include/linux/uuid.h b/backport/backport-include/linux/uuid.h
new file mode 100644 (file)
index 0000000..5ffe225
--- /dev/null
+++ b/backport/backport-include/linux/uuid.h
@@ -0,0 +1,25 @@
+#ifndef __BACKPORT_LINUX_UUID_H_
+#define __BACKPORT_LINUX_UUID_H_
+#include <linux/version.h>
+#include_next <linux/uuid.h>
+
+#if LINUX_VERSION_IS_LESS(4,13,0)
+#define guid_t uuid_le
+#define uuid_t uuid_be
+
+static inline void guid_gen(guid_t *u)
+{
+       return uuid_le_gen(u);
+}
+static inline void uuid_gen(uuid_t *u)
+{
+       return uuid_be_gen(u);
+}
+
+static inline void guid_copy(guid_t *dst, const guid_t *src)
+{
+       memcpy(dst, src, sizeof(guid_t));
+}
+#endif
+
+#endif /* __BACKPORT_LINUX_UUID_H_ */