On Sun, Oct 28, 2018 at 10:13 PM Changbin Du [off-list ref] wrote:

With '-Og' optimization level, GCC would not optimize a count for a loop
as a constant value. But BUILD_BUG_ON() only accept compile-time constant
values. Let's use __fix_to_virt() to avoid the error.

arch/arm/mm/mmu.o: In function `fix_to_virt':
/home/changbin/work/linux/./include/asm-generic/fixmap.h:31: undefined reference to `__compiletime_assert_31'
Makefile:1051: recipe for target 'vmlinux' failed
make: *** [vmlinux] Error 1

Signed-off-by: Changbin Du <redacted>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
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Applied to linux-kbuild





-- 
Best Regards
Masahiro Yamada