4 files changed, 13 insertions, 8 deletions
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 2a21ca86b720..f72aba64d611 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -85,7 +85,7 @@ else ifeq ($(KBUILD_CHECKSRC),2)
         cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $<
 endif
 
-ifneq ($(KBUILD_ENABLE_EXTRA_GCC_CHECKS),)
+ifneq ($(KBUILD_EXTRA_WARN),)
   cmd_checkdoc = $(srctree)/scripts/kernel-doc -none $<
 endif
 
diff --git a/scripts/Makefile.extrawarn b/scripts/Makefile.extrawarn
index d226c5fb13e2..53eb7e0c6a5a 100644
--- a/scripts/Makefile.extrawarn
+++ b/scripts/Makefile.extrawarn
@@ -8,14 +8,19 @@
 
 KBUILD_CFLAGS += $(call cc-disable-warning, packed-not-aligned)
 
+# backward compatibility
+KBUILD_EXTRA_WARN ?= $(KBUILD_ENABLE_EXTRA_GCC_CHECKS)
+
 ifeq ("$(origin W)", "command line")
-  export KBUILD_ENABLE_EXTRA_GCC_CHECKS := $(W)
+  KBUILD_EXTRA_WARN := $(W)
 endif
 
+export KBUILD_EXTRA_WARN
+
 #
 # W=1 - warnings which may be relevant and do not occur too often
 #
-ifneq ($(findstring 1, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS)),)
+ifneq ($(findstring 1, $(KBUILD_EXTRA_WARN)),)
 
 KBUILD_CFLAGS += -Wextra -Wunused -Wno-unused-parameter
 KBUILD_CFLAGS += -Wmissing-declarations
@@ -48,7 +53,7 @@ endif
 #
 # W=2 - warnings which occur quite often but may still be relevant
 #
-ifneq ($(findstring 2, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS)),)
+ifneq ($(findstring 2, $(KBUILD_EXTRA_WARN)),)
 
 KBUILD_CFLAGS += -Wcast-align
 KBUILD_CFLAGS += -Wdisabled-optimization
@@ -65,7 +70,7 @@ endif
 #
 # W=3 - more obscure warnings, can most likely be ignored
 #
-ifneq ($(findstring 3, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS)),)
+ifneq ($(findstring 3, $(KBUILD_EXTRA_WARN)),)
 
 KBUILD_CFLAGS += -Wbad-function-cast
 KBUILD_CFLAGS += -Wcast-qual
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 380a7d11a573..4a0cdd6f5909 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -251,7 +251,7 @@ quiet_cmd_gzip = GZIP    $@
 DTC ?= $(objtree)/scripts/dtc/dtc
 
 # Disable noisy checks by default
-ifeq ($(findstring 1,$(KBUILD_ENABLE_EXTRA_GCC_CHECKS)),)
+ifeq ($(findstring 1,$(KBUILD_EXTRA_WARN)),)
 DTC_FLAGS += -Wno-unit_address_vs_reg \
 	-Wno-unit_address_format \
 	-Wno-avoid_unnecessary_addr_size \
@@ -262,7 +262,7 @@ DTC_FLAGS += -Wno-unit_address_vs_reg \
 	-Wno-pci_device_reg
 endif
 
-ifneq ($(findstring 2,$(KBUILD_ENABLE_EXTRA_GCC_CHECKS)),)
+ifneq ($(findstring 2,$(KBUILD_EXTRA_WARN)),)
 DTC_FLAGS += -Wnode_name_chars_strict \
 	-Wproperty_name_chars_strict
 endif
diff --git a/scripts/genksyms/Makefile b/scripts/genksyms/Makefile
index baf44ed0a93a..78629f515e78 100644
--- a/scripts/genksyms/Makefile
+++ b/scripts/genksyms/Makefile
@@ -12,7 +12,7 @@ genksyms-objs	:= genksyms.o parse.tab.o lex.lex.o
 #
 # Just in case, run "$(YACC) --version" without suppressing stderr
 # so that 'bison: not found' will be displayed if it is missing.
-ifeq ($(findstring 1,$(KBUILD_ENABLE_EXTRA_GCC_CHECKS)),)
+ifeq ($(findstring 1,$(KBUILD_EXTRA_WARN)),)
 
 quiet_cmd_bison_no_warn = $(quiet_cmd_bison)
       cmd_bison_no_warn = $(YACC) --version >/dev/null; \