# SPDX-License-Identifier: GPL-2.0

  ifdef CONFIG_KASAN
  ifdef CONFIG_KASAN_INLINE
  	call_threshold := 10000
  else
  	call_threshold := 0
  endif

  KASAN_SHADOW_OFFSET ?= $(CONFIG_KASAN_SHADOW_OFFSET)

  CFLAGS_KASAN_MINIMAL := -fsanitize=kernel-address
  
  CFLAGS_KASAN := $(call cc-option, -fsanitize=kernel-address \

  		-fasan-shadow-offset=$(KASAN_SHADOW_OFFSET) \

  		--param asan-stack=1 --param asan-globals=1 \

  		--param asan-instrumentation-with-call-threshold=$(call_threshold))
  
  ifeq ($(call cc-option, $(CFLAGS_KASAN_MINIMAL) -Werror),)

     ifneq ($(CONFIG_COMPILE_TEST),y)

          $(warning Cannot use CONFIG_KASAN: \
              -fsanitize=kernel-address is not supported by compiler)

     endif

  else
      ifeq ($(CFLAGS_KASAN),)

          ifneq ($(CONFIG_COMPILE_TEST),y)
              $(warning CONFIG_KASAN: compiler does not support all options.\
                  Trying minimal configuration)
          endif

          CFLAGS_KASAN := $(CFLAGS_KASAN_MINIMAL)
      endif
  endif

  ifdef CONFIG_KASAN_EXTRA

  CFLAGS_KASAN += $(call cc-option, -fsanitize-address-use-after-scope)

  endif

  
  CFLAGS_KASAN_NOSANITIZE := -fno-builtin

  endif