Messages in this thread | | | Date | Fri, 5 Oct 2012 13:59:22 -0700 | From | Josh Triplett <> | Subject | Re: [PATCH v2 07/10] compiler.h, bug.h: Prevent double error messages with BUILD_BUG{,_ON} |
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On Fri, Oct 05, 2012 at 02:42:46PM -0500, danielfsantos@att.net wrote: > --- a/include/linux/compiler.h > +++ b/include/linux/compiler.h > @@ -296,6 +296,11 @@ void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect); > #endif > #ifndef __compiletime_error > # define __compiletime_error(message) > +# define __compiletime_error_fallback(condition) \ > + ((void)sizeof(char[1 - 2*!!(condition)])) > +#endif > +#ifndef __compiletime_error_fallback > +# define __compiletime_error_fallback(condition) (void)(0)
Might want to use do { } while (0) here, to force the use of a semicolon and avoid the use of __compiletime_error_fallback in an expression.
- Josh Triplett
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