KVM: emulate: clean up initializations in init_decode_cache

A lot of initializations are unnecessary as they get set to
appropriate values before actually being used. Optimize
placement of fields in x86_emulate_ctxt

Signed-off-by: Bandan Das <bsd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 2 insertions, 5 deletions

diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 94f5f8b94ce9..3e9bbdc4c76a 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -4534,14 +4534,11 @@ static int fastop(struct x86_emulate_ctxt *ctxt, void (*fop)(struct fastop *))
 
 void init_decode_cache(struct x86_emulate_ctxt *ctxt)
 {
-        memset(&ctxt->opcode_len, 0,
-               (void *)&ctxt->_regs - (void *)&ctxt->opcode_len);
+        memset(&ctxt->has_seg_override, 0,
+               (void *)&ctxt->modrm - (void *)&ctxt->has_seg_override);
 
-        ctxt->fetch.start = 0;
-        ctxt->fetch.end = 0;
         ctxt->io_read.pos = 0;
         ctxt->io_read.end = 0;
-        ctxt->mem_read.pos = 0;
         ctxt->mem_read.end = 0;
 }