https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66122
--- Comment #8 from Denis Vlasenko <vda.linux at googlemail dot com> --- If you try to reproduce this with kernel build, be sure to not select CONFIG_OPTIMIZE_INLINING (it forces inlining by making all iniline functions __always_inline). I didn't mention it before, but the recent (as of this writing) gcc 5.1.1 20150422 (Red Hat 5.1.1-1) with -Os easily triggers this behavior (more than a thousand *.o modules with spurious deinlines during kernel build).
