KVM: allow disabling -Werror

Restrict -Werror to well-tested configurations and allow disabling it via Kconfig. Reported-by: Christoph Hellwig <[email protected]> Signed-off-by: Paolo Bonzini <[email protected]>
teawater · Feb 28, 2020 · 4f337fa · 4f337fa
1 parent 575b255
commit 4f337fa
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diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig
@@ -59,6 +59,19 @@ config KVM
 
 	  If unsure, say N.
 
+config KVM_WERROR
+	bool "Compile KVM with -Werror"
+	# KASAN may cause the build to fail due to larger frames
+	default y if X86_64 && !KASAN
+	# We use the dependency on !COMPILE_TEST to not be enabled
+	# blindly in allmodconfig or allyesconfig configurations
+	depends on (X86_64 && !KASAN) || !COMPILE_TEST
+	depends on EXPERT
+	help
+	  Add -Werror to the build flags for (and only for) i915.ko.
+
+	  If in doubt, say "N".
+
 config KVM_INTEL
 	tristate "KVM for Intel (and compatible) processors support"
 	depends on KVM && IA32_FEAT_CTL

diff --git a/arch/x86/kvm/Makefile b/arch/x86/kvm/Makefile
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 
 ccflags-y += -Iarch/x86/kvm
-ccflags-y += -Werror
+ccflags-$(CONFIG_KVM_WERROR) += -Werror
 
 KVM := ../../../virt/kvm