Re: [PATCH v3 3/4] ARM: mm: fix build error in fix_to_virt with CONFIG_CC_OPTIMIZE_FOR_DEBUGGING

[Masahiro Yamada]

On Sun, Oct 28, 2018 at 10:13 PM Changbin Du <changbin.du@xxxxxxxxx> 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 <changbin.du@xxxxxxxxx>
> Acked-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
> ---

Applied to linux-kbuild





-- 
Best Regards
Masahiro Yamada