mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 09:19:51 +00:00
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>
This commit is contained in:
parent
198c74f43f
commit
d72d946d0b
1 changed files with 0 additions and 2 deletions
|
@ -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);
|
||||
|
|
Loading…
Reference in a new issue