On Wed, Jan 30, 2019 at 07:32:41PM +0300, Eugeniy Paltsev wrote: > As of today we enable unaligned access unconditionally on ARCv2. > Do this under a Kconfig option to allow disable it for test, benchmarking > etc. Also while at it > > - Select HAVE_EFFICIENT_UNALIGNED_ACCESS > - Although gcc defaults to unaligned access (since GNU 2018.03), add the > right toggles for enabling or disabling as appropriate > - update bootlog to prints both HW feature status (exists, enabled/disabled) > and SW status (used / not used). > - wire up the relaxed memcpy for unaligned access > > Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@xxxxxxxxxxxx> > Signed-off-by: Vineet Gupta <vgupta@xxxxxxxxxxxx> > [vgupta: squashed patches, handle gcc -mno-unaligned-access quick] Hi, with my brand-new gcc-8.3.0, built from upstream gcc, this patch results in arch/arc/kernel/setup.c: In function 'arc_cpu_mumbojumbo.constprop': include/linux/compiler.h:348:38: error: call to '__compiletime_assert_326' declared with attribute error: gcc doesn't support -mno-unaligned-access when trying to build allnoconfig or tinyconfig. I get the same results with gcc-8.2.0. Do I need some special compiler configuration flag when building the arcv2 toolchain ? Or am I simply out of luck for using upstream gcc ? Thanks, Guenter _______________________________________________ linux-snps-arc mailing list linux-snps-arc@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/linux-snps-arc
