[PATCH 04/14] KVM: x86: Use local MMIO fragment variable to clean up emulator_read_write()

[Sean Christopherson <seanjc@google.com>]

Grab the MMIO fragment used by emulator_read_write() to initiate an exit
to userspace in a local variable to make the code easier to read.

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
---
 arch/x86/kvm/x86.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index a74ae3a81076..7cbd6f7d8578 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -8231,7 +8231,7 @@ static int emulator_read_write(struct x86_emulate_ctxt *ctxt,
 			const struct read_write_emulator_ops *ops)
 {
 	struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
-	gpa_t gpa;
+	struct kvm_mmio_fragment *frag;
 	int rc;
 
 	if (WARN_ON_ONCE((bytes > 8u || !ops->write) && object_is_on_stack(val)))
@@ -8287,17 +8287,16 @@ static int emulator_read_write(struct x86_emulate_ctxt *ctxt,
 	if (!vcpu->mmio_nr_fragments)
 		return X86EMUL_CONTINUE;
 
-	gpa = vcpu->mmio_fragments[0].gpa;
-
 	vcpu->mmio_needed = 1;
 	vcpu->mmio_cur_fragment = 0;
 
-	vcpu->run->mmio.len = min(8u, vcpu->mmio_fragments[0].len);
+	frag = &vcpu->mmio_fragments[0];
+	vcpu->run->mmio.len = min(8u, frag->len);
 	vcpu->run->mmio.is_write = vcpu->mmio_is_write = ops->write;
 	vcpu->run->exit_reason = KVM_EXIT_MMIO;
-	vcpu->run->mmio.phys_addr = gpa;
+	vcpu->run->mmio.phys_addr = frag->gpa;
 
-	return ops->read_write_exit_mmio(vcpu, gpa, val, bytes);
+	return ops->read_write_exit_mmio(vcpu, frag->gpa, val, bytes);
 }
 
 static int emulator_read_emulated(struct x86_emulate_ctxt *ctxt,
-- 
2.53.0.414.gf7e9f6c205-goog