kvm-all: drop kvm_setup_guest_memory

kvm_setup_guest_memory only does "madvise to QEMU_MADV_DONTFORK" and
is only called by ram_block_add, which actually is duplicate code.
Bonus: add simple comment for kvm_has_sync_mmu to make life easier.

Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Cao jin <caoj.fnst@cn.fujitsu.com>
Message-Id: <1473662096-32598-1-git-send-email-caoj.fnst@cn.fujitsu.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 1 insertions, 3 deletions

diff --git a/exec.c b/exec.c
index ce3fb9ec8e..c81d5ab981 100644
--- a/exec.c
+++ b/exec.c
@@ -1621,10 +1621,8 @@ static void ram_block_add(RAMBlock *new_block, Error **errp)
     if (new_block->host) {
         qemu_ram_setup_dump(new_block->host, new_block->max_length);
         qemu_madvise(new_block->host, new_block->max_length, QEMU_MADV_HUGEPAGE);
+        /* MADV_DONTFORK is also needed by KVM in absence of synchronous MMU */
         qemu_madvise(new_block->host, new_block->max_length, QEMU_MADV_DONTFORK);
-        if (kvm_enabled()) {
-            kvm_setup_guest_memory(new_block->host, new_block->max_length);
-        }
     }
 }