This allows structure annotations for requiring designated initialization in GCC 5.1.0 and later: https://gcc.gnu.org/onlinedocs/gcc/Designated-Inits.html
The structure randomization layout plugin will be using this to help identify structures that need this form of initialization. Signed-off-by: Kees Cook <keesc...@chromium.org> --- include/linux/compiler-gcc.h | 8 ++++++++ include/linux/compiler.h | 4 ++++ 2 files changed, 12 insertions(+) diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h index 0efef9cf014f..386caf6771ed 100644 --- a/include/linux/compiler-gcc.h +++ b/include/linux/compiler-gcc.h @@ -294,6 +294,14 @@ #define __no_sanitize_address __attribute__((no_sanitize_address)) #endif +#if GCC_VERSION >= 50100 +/* + * Mark structures as requiring designated initializers. + * https://gcc.gnu.org/onlinedocs/gcc/Designated-Inits.html + */ +#define __designated_init __attribute__((designated_init)) +#endif + #endif /* gcc version >= 40000 specific checks */ #if !defined(__noclone) diff --git a/include/linux/compiler.h b/include/linux/compiler.h index 707242fdbb89..bbe881054bf0 100644 --- a/include/linux/compiler.h +++ b/include/linux/compiler.h @@ -436,6 +436,10 @@ static __always_inline void __write_once_size(volatile void *p, void *res, int s # define __attribute_const__ /* unimplemented */ #endif +#ifndef __designated_init +# define __designated_init +#endif + #ifndef __latent_entropy # define __latent_entropy #endif -- 2.7.4