On Thu, Dec 09, 2021 at 11:58:17AM +0100, Ahmad Fatoum wrote: > BUILD_BUG_ON can't be used outside of a function, unlike static_assert. > Import the macro definition. > > Signed-off-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx> > --- > include/linux/build_bug.h | 19 +++++++++++++++++++ > 1 file changed, 19 insertions(+) Applied, thanks Sascha > > diff --git a/include/linux/build_bug.h b/include/linux/build_bug.h > index 43d1fd50d433..40cd504f63ba 100644 > --- a/include/linux/build_bug.h > +++ b/include/linux/build_bug.h > @@ -80,4 +80,23 @@ > > #endif /* __CHECKER__ */ > > +/** > + * static_assert - check integer constant expression at build time > + * > + * static_assert() is a wrapper for the C11 _Static_assert, with a > + * little macro magic to make the message optional (defaulting to the > + * stringification of the tested expression). > + * > + * Contrary to BUILD_BUG_ON(), static_assert() can be used at global > + * scope, but requires the expression to be an integer constant > + * expression (i.e., it is not enough that __builtin_constant_p() is > + * true for expr). > + * > + * Also note that BUILD_BUG_ON() fails the build if the condition is > + * true, while static_assert() fails the build if the expression is > + * false. > + */ > +#define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr) > +#define __static_assert(expr, msg, ...) _Static_assert(expr, msg) > + > #endif /* _LINUX_BUILD_BUG_H */ > -- > 2.30.2 > > > _______________________________________________ > barebox mailing list > barebox@xxxxxxxxxxxxxxxxxxx > http://lists.infradead.org/mailman/listinfo/barebox > -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
