linux-kernel - [PATCH] KVM: make: Fix out-of-source module builds

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Message-ID: <20210324124347.18336-1-sidcha@amazon.de>
Date:   Wed, 24 Mar 2021 13:43:47 +0100
From:   Siddharth Chandrasekaran <sidcha@...zon.de>
To:     Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        <x86@...nel.org>, "H. Peter Anvin" <hpa@...or.com>
CC:     Siddharth Chandrasekaran <sidcha@...zon.de>, <kvm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH] KVM: make: Fix out-of-source module builds

Building kvm module out-of-source with,

    make -C $SRC O=$BIN M=arch/x86/kvm

fails to find "irq.h" as the include dir passed to cflags-y does not
prefix the source dir. Fix this by prefixing $(srctree) to the include
dir path.

Signed-off-by: Siddharth Chandrasekaran <sidcha@...zon.de>
---
 arch/x86/kvm/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/Makefile b/arch/x86/kvm/Makefile
index 1b4766fe1de2..eafc4d601f25 100644
--- a/arch/x86/kvm/Makefile
+++ b/arch/x86/kvm/Makefile
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 
-ccflags-y += -Iarch/x86/kvm
+ccflags-y += -I $(srctree)/arch/x86/kvm
 ccflags-$(CONFIG_KVM_WERROR) += -Werror
 
 ifeq ($(CONFIG_FRAME_POINTER),y)
-- 
2.17.1




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