134cd49c08
commit 676f819c3e98 ("KVM: Discard zero mask with function kvm_dirty_ring_reset")
Conflict: none
Backport-reason: Synchronize upstream linux loongarch kvm
patch to support loongarch virtualization.
Checkpatch: no, to be consistent with upstream commit.
Function kvm_reset_dirty_gfn may be called with parameters cur_slot /
cur_offset / mask are all zero, it does not represent real dirty page.
It is not necessary to clear dirty page in this condition. Also return
value of macro __fls() is undefined if mask is zero which is called in
funciton kvm_reset_dirty_gfn(). Here just return.
Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Message-ID: <20240613122803.1031511-1-maobibo@loongson.cn>
[Move the conditional inside kvm_reset_dirty_gfn; suggested by
Sean Christopherson. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Xianglai Li <lixianglai@loongson.cn>
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