linux-kernel - [PATCH] kbuild: Add dtc flag test

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Wed,  5 Aug 2020 10:58:48 -0700
From:   Elliot Berman <eberman@...eaurora.org>
To:     Masahiro Yamada <masahiroy@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>
Cc:     Elliot Berman <eberman@...eaurora.org>,
        linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, Steve Muckle <smuckle@...gle.com>,
        Trilok Soni <tsoni@...eaurora.org>
Subject: [PATCH] kbuild: Add dtc flag test

Host dtc may not support the same flags as kernel's copy of dtc. Test
if dtc supports each flag when the dtc comes from host.

Signed-off-by: Elliot Berman <eberman@...eaurora.org>
---
 scripts/Makefile.lib | 34 ++++++++++++++++++++++------------
 1 file changed, 22 insertions(+), 12 deletions(-)

diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 841ac03..2722a67 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -274,25 +274,35 @@ quiet_cmd_gzip = GZIP    $@
 
 # DTC
 # ---------------------------------------------------------------------------
+ifeq ("$(origin DTC)", "command line")
+PHONY += $(DTC)
+dtc-option = $(call try-run, $(DTC) $1 -v,$1)
+else
+# Just add the flag. DTC is compiled later as a prerequisite, so there's no dtc
+# to test the flag against. This is okay because we're not testing flags which
+# aren't supported by in-kernel dtc to begin with.
+dtc-option = $1
+endif
+
 DTC ?= $(objtree)/scripts/dtc/dtc
-DTC_FLAGS += -Wno-interrupt_provider
+DTC_FLAGS += $(call dtc-option,-Wno-interrupt_provider)
 
 # Disable noisy checks by default
 ifeq ($(findstring 1,$(KBUILD_EXTRA_WARN)),)
-DTC_FLAGS += -Wno-unit_address_vs_reg \
-	-Wno-unit_address_format \
-	-Wno-avoid_unnecessary_addr_size \
-	-Wno-alias_paths \
-	-Wno-graph_child_address \
-	-Wno-simple_bus_reg \
-	-Wno-unique_unit_address \
-	-Wno-pci_device_reg
+DTC_FLAGS += $(call dtc-option,-Wno-unit_address_vs_reg) \
+	$(call dtc-option,-Wno-unit_address_format) \
+	$(call dtc-option,-Wno-avoid_unnecessary_addr_size) \
+	$(call dtc-option,-Wno-alias_paths) \
+	$(call dtc-option,-Wno-graph_child_address) \
+	$(call dtc-option,-Wno-simple_bus_reg) \
+	$(call dtc-option,-Wno-unique_unit_address) \
+	$(call dtc-option,-Wno-pci_device_reg)
 endif
 
 ifneq ($(findstring 2,$(KBUILD_EXTRA_WARN)),)
-DTC_FLAGS += -Wnode_name_chars_strict \
-	-Wproperty_name_chars_strict \
-	-Winterrupt_provider
+DTC_FLAGS += $(call dtc-option,-Wnode_name_chars_strict) \
+	$(call dtc-option,-Wproperty_name_chars_strict) \
+	$(call dtc-option,-Winterrupt_provider)
 endif
 
 DTC_FLAGS += $(DTC_FLAGS_$(basetarget))
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project