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authorSean Christopherson <seanjc@google.com>2022-04-29 04:04:08 +0300
committerPaolo Bonzini <pbonzini@redhat.com>2022-06-20 13:21:31 +0300
commit28b85ae06f64bf1c1adea68a2fbb31dc40cc060e (patch)
treeeaf8513c6561518e6a241aa4897c705d21155806 /virt
parent70e41c31bc7776b262cd9f524df3dfc2b5869a0a (diff)
downloadlinux-28b85ae06f64bf1c1adea68a2fbb31dc40cc060e.tar.xz
KVM: Drop bogus "pfn != 0" guard from kvm_release_pfn()
Remove a check from kvm_release_pfn() to bail if the provided @pfn is zero. Zero is a perfectly valid pfn on most architectures, and should not be used to indicate an error or an invalid pfn. The bogus check was added by commit 917248144db5 ("x86/kvm: Cache gfn to pfn translation"), which also did the bad thing of zeroing the pfn and gfn to mark a cache invalid. Thankfully, that bad behavior was axed by commit 357a18ad230f ("KVM: Kill kvm_map_gfn() / kvm_unmap_gfn() and gfn_to_pfn_cache"). Signed-off-by: Sean Christopherson <seanjc@google.com> Message-Id: <20220429010416.2788472-3-seanjc@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/kvm_main.c3
1 files changed, 0 insertions, 3 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index b13acbaa6d2a..8f475d174e3d 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -2745,9 +2745,6 @@ EXPORT_SYMBOL_GPL(gfn_to_page);
void kvm_release_pfn(kvm_pfn_t pfn, bool dirty)
{
- if (pfn == 0)
- return;
-
if (dirty)
kvm_release_pfn_dirty(pfn);
else