diff options
| author | Oleg Nesterov <oleg@redhat.com> | 2014-04-21 17:25:58 +0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-04-28 19:24:25 +0400 |
| commit | d72d946d0b649b79709b99b9d5cb7269fff8afaa (patch) | |
| tree | 3675c544f3193c0f829fb9b0d60af070a7c785bd | |
| parent | 198c74f43f0f5473f99967aead30ddc622804bc1 (diff) | |
| download | linux-d72d946d0b649b79709b99b9d5cb7269fff8afaa.tar.xz | |
KVM: async_pf: kill the unnecessary use_mm/unuse_mm async_pf_execute()
async_pf_execute() has no reasons to adopt apf->mm, gup(current, mm)
should work just fine even if current has another or NULL ->mm.
Recently kvm_async_page_present_sync() was added insedie the "use_mm"
section, but it seems that it doesn't need current->mm too.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reviewed-by: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | virt/kvm/async_pf.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/virt/kvm/async_pf.c b/virt/kvm/async_pf.c index 10df100c4514..0ced4f31bc65 100644 --- a/virt/kvm/async_pf.c +++ b/virt/kvm/async_pf.c @@ -80,12 +80,10 @@ static void async_pf_execute(struct work_struct *work) might_sleep(); - use_mm(mm); down_read(&mm->mmap_sem); get_user_pages(current, mm, addr, 1, 1, 0, NULL, NULL); up_read(&mm->mmap_sem); kvm_async_page_present_sync(vcpu, apf); - unuse_mm(mm); spin_lock(&vcpu->async_pf.lock); list_add_tail(&apf->link, &vcpu->async_pf.done); |