diff options
| author | Paul Durrant <pdurrant@amazon.com> | 2020-11-25 14:06:27 +0100 |
|---|---|---|
| committer | Jan Beulich <jbeulich@suse.com> | 2020-11-25 14:06:27 +0100 |
| commit | 758fae24d7b90fcfa7dffbffb5a5cab274caf3fc (patch) | |
| tree | 4871ed40ce3e1730ef7f4268115963aa5ab42e8b | |
| parent | 1e6d7bd585232c2526590a348871c40d5b384ac7 (diff) | |
xen/include: import sizeof_field() macro from Linux stddef.h
Co-locate it with the definition of offsetof() (since this is also in stddef.h
in the Linux kernel source). This macro will be needed in a subsequent patch.
Signed-off-by: Paul Durrant <pdurrant@amazon.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
| -rw-r--r-- | xen/include/xen/compiler.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/xen/include/xen/compiler.h b/xen/include/xen/compiler.h index c0e0ee9f27..676c6ea1b0 100644 --- a/xen/include/xen/compiler.h +++ b/xen/include/xen/compiler.h @@ -76,6 +76,14 @@ #define offsetof(a,b) __builtin_offsetof(a,b) +/** + * sizeof_field(TYPE, MEMBER) + * + * @TYPE: The structure containing the field of interest + * @MEMBER: The field to return the size of + */ +#define sizeof_field(TYPE, MEMBER) sizeof((((TYPE *)0)->MEMBER)) + #if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 201112L #define alignof __alignof__ #endif |