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 <jsl...@suse.cz> > Cc: Martin Liska <mli...@suse.cz> > Cc: Zhenyu Wang <zhen...@linux.intel.com> > Cc: Zhi Wang <zhi.a.w...@intel.com> > Cc: Daniel Vetter <daniel.vet...@intel.com> > Cc: Jani Nikula <jani.nik...@linux.intel.com> > Cc: David Airlie <airl...@linux.ie> > Cc: intel-gvt-...@lists.freedesktop.org > Cc: intel-gfx@lists.freedesktop.org > Cc: dri-de...@lists.freedesktop.org > --- > 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! -- Open Source Technology Center, Intel ltd. $gpg --keyserver wwwkeys.pgp.net --recv-keys 4D781827
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