On Fri, Mar 31, 2017 at 12:29 PM, Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx> wrote: > 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 Sorry about that, it looked like I never replied to your last mail. There is also a related problem that I had sent another fix for: https://patchwork.kernel.org/patch/9601349/ I still think that my two patches are correct and they should both be applied. Arnd _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
