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| author | Hauke Mehrtens <hauke@hauke-m.de> | 2022-11-27 19:02:46 +0100 |
|---|---|---|
| committer | Hauke Mehrtens <hauke@hauke-m.de> | 2022-12-03 17:03:36 +0100 |
| commit | da60273fc6af89c37a14f80aa7b76bb570e82968 (patch) | |
| tree | 51a4491268f8441d1c802931ed95e978f5fa316a | |
| parent | e2d7896795bed7483fb08ff47801afdbd7cd9849 (diff) | |
| download | backports-da60273fc6af89c37a14f80aa7b76bb570e82968.tar.gz | |
headers: Add DECLARE_FLEX_ARRAY()
Copy this from kernel 5.15.80.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
| -rw-r--r-- | backport/backport-include/linux/stddef.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/backport/backport-include/linux/stddef.h b/backport/backport-include/linux/stddef.h index a6cdc67d..a0765ef3 100644 --- a/backport/backport-include/linux/stddef.h +++ b/backport/backport-include/linux/stddef.h @@ -23,4 +23,37 @@ (offsetof(TYPE, MEMBER) + sizeof_field(TYPE, MEMBER)) #endif +#ifndef __DECLARE_FLEX_ARRAY +/** + * __DECLARE_FLEX_ARRAY() - Declare a flexible array usable in a union + * + * @TYPE: The type of each flexible array element + * @NAME: The name of the flexible array member + * + * In order to have a flexible array member in a union or alone in a + * struct, it needs to be wrapped in an anonymous struct with at least 1 + * named member, but that member can be empty. + */ +#define __DECLARE_FLEX_ARRAY(TYPE, NAME) \ + struct { \ + struct { } __empty_ ## NAME; \ + TYPE NAME[]; \ + } +#endif + +#ifndef DECLARE_FLEX_ARRAY +/** + * DECLARE_FLEX_ARRAY() - Declare a flexible array usable in a union + * + * @TYPE: The type of each flexible array element + * @NAME: The name of the flexible array member + * + * In order to have a flexible array member in a union or alone in a + * struct, it needs to be wrapped in an anonymous struct with at least 1 + * named member, but that member can be empty. + */ +#define DECLARE_FLEX_ARRAY(TYPE, NAME) \ + __DECLARE_FLEX_ARRAY(TYPE, NAME) +#endif + #endif /* __BACKPORT_LINUX_STDDEF_H */ |