From: Paul Durrant <pdurr...@amazon.com> 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 <pdurr...@amazon.com> Acked-by: Jan Beulich <jbeul...@suse.com> --- Cc: Andrew Cooper <andrew.coop...@citrix.com> Cc: George Dunlap <george.dun...@citrix.com> Cc: Ian Jackson <i...@xenproject.org> Cc: Julien Grall <jul...@xen.org> Cc: Stefano Stabellini <sstabell...@kernel.org> Cc: Wei Liu <w...@xen.org> --- xen/include/xen/compiler.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/xen/include/xen/compiler.h b/xen/include/xen/compiler.h index c0e0ee9f27be..676c6ea1b0a0 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 -- 2.20.1
