Messages in this thread | | | Subject | Re: Build failure with v4.9-rc1 and GCC trunk -- compiler weirdness | From | Joe Perches <> | Date | Wed, 01 Feb 2017 12:34:01 -0800 |
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On Wed, 2017-02-01 at 19:53 +0000, Ard Biesheuvel wrote: > On 1 February 2017 at 19:49, Joe Perches <joe@perches.com> wrote: [] > > Or maybe add a BUILD_BUG_ON something like: > > > > #define order_base_2(n) \ > > ({ \ > > typeof(n) _n = n; \ > > BUILD_BUG_ON(__builtin_constant_p(_n) && _n < 0); \ > > __builtin_constant_p(_n) ? (_n < 2 ? _n : ilog2((_n) - 1) + 1)) \ > > : __order_base_2(_n); \ > > }) > > > > This would interfere with the ability to use order_base_2() in > initializers for global variables.
There aren't any as far as I can tell and would using order_base_2() for a global initializer make sense?
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