[PATCH gmem 1/6] KVM: guest_memfd: Fix stub for kvm_gmem_get_uninit_pfn()

From: Michael Roth <michael.roth@amd.com>
To: <kvm@vger.kernel.org>
Cc: <linux-coco@lists.linux.dev>, Paolo Bonzini <pbonzini@redhat.com>,
	Sean Christopherson <seanjc@google.com>,
	Isaku Yamahata <isaku.yamahata@linux.intel.com>,
	Xu Yilun <yilun.xu@linux.intel.com>,
	Binbin Wu <binbin.wu@linux.intel.com>,
	Xiaoyao Li <xiaoyao.li@intel.com>
Subject: [PATCH gmem 1/6] KVM: guest_memfd: Fix stub for kvm_gmem_get_uninit_pfn()
Date: Fri, 29 Mar 2024 16:24:39 -0500	[thread overview]
Message-ID: <20240329212444.395559-2-michael.roth@amd.com> (raw)
In-Reply-To: <20240329212444.395559-1-michael.roth@amd.com>

The stub needs to return an integer in order to avoid breakage when
CONFIG_KVM_PRIVATE_MEM is not set. Add it.

Signed-off-by: Michael Roth <michael.roth@amd.com>
---
 include/linux/kvm_host.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 73638779974a..2f5074eff958 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -2459,7 +2459,9 @@ static inline int kvm_gmem_get_uninit_pfn(struct kvm *kvm,
 static inline int kvm_gmem_undo_get_pfn(struct kvm *kvm,
 				        struct kvm_memory_slot *slot, gfn_t gfn,
 				        int order)
-{}
+{
+	return -EIO;
+}
 #endif /* CONFIG_KVM_PRIVATE_MEM */
 
 #ifdef CONFIG_HAVE_KVM_GMEM_PREPARE
-- 
2.25.1

