On Fri, 31 Mar 2017, Zhenyu Wang <zhenyuw@xxxxxxxxxxxxxxx> wrote: > On 2017.03.30 11:46:27 +0200, Jiri Slaby wrote: >> Handlers are currently the only blocker to compile the kernel with gcc 7 >> and KASAN+use-after-scope enabled: >> drivers/gpu/drm/i915/gvt/handlers.c:2200:1: error: the frame size of 43760 bytes is larger than 2048 bytes [-Werror=frame-larger-than=] >> drivers/gpu/drm/i915/gvt/handlers.c:2402:1: error: the frame size of 9400 bytes is larger than 2048 bytes [-Werror=frame-larger-than=] >> drivers/gpu/drm/i915/gvt/handlers.c:2628:1: error: the frame size of 11256 bytes is larger than 2048 bytes [-Werror=frame-larger-than=] >> >> It is due to many expansions of MMIO_* macros in init_generic_mmio_info. >> INTEL_GVT_MMIO_OFFSET generates for each such line a __reg and an >> offset. There are too many for KASAN to keep up. >> >> So disable KASAN for this file. >> >> Signed-off-by: Jiri Slaby <jslaby@xxxxxxx> >> Cc: Martin Liska <mliska@xxxxxxx> >> Cc: Zhenyu Wang <zhenyuw@xxxxxxxxxxxxxxx> >> Cc: Zhi Wang <zhi.a.wang@xxxxxxxxx> >> Cc: Daniel Vetter <daniel.vetter@xxxxxxxxx> >> Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx> >> Cc: David Airlie <airlied@xxxxxxxx> >> Cc: intel-gvt-dev@xxxxxxxxxxxxxxxxxxxxx >> Cc: intel-gfx@xxxxxxxxxxxxxxxxxxxxx >> Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx >> --- >> drivers/gpu/drm/i915/gvt/Makefile | 2 ++ >> 1 file changed, 2 insertions(+) >> >> diff --git a/drivers/gpu/drm/i915/gvt/Makefile b/drivers/gpu/drm/i915/gvt/Makefile >> index b123c20e2097..942f1849d194 100644 >> --- a/drivers/gpu/drm/i915/gvt/Makefile >> +++ b/drivers/gpu/drm/i915/gvt/Makefile >> @@ -6,3 +6,5 @@ GVT_SOURCE := gvt.o aperture_gm.o handlers.o vgpu.o trace_points.o firmware.o \ >> ccflags-y += -I$(src) -I$(src)/$(GVT_DIR) -Wall >> i915-y += $(addprefix $(GVT_DIR)/, $(GVT_SOURCE)) >> obj-$(CONFIG_DRM_I915_GVT_KVMGT) += $(GVT_DIR)/kvmgt.o >> + >> +KASAN_SANITIZE_handlers.o := n >> -- >> 2.12.2 >> > > Applied this, we'd better cleanup legacy usage to current i915 mmio > reg define. Thanks! Hmmh, that was a bit fast, there was a related discussion going in [1]. BR, Jani. [1] http://mid.mail-archive.com/20170320215713.3086140-1-arnd@xxxxxxxx -- Jani Nikula, Intel Open Source Technology Center _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
