xiaomi-sm8450/android_kernel_xiaomi_sm8450
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mm: gup: kvm use get_user_pages_unlocked

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Use the more generic get_user_pages_unlocked which has the additional
benefit of passing FAULT_FLAG_ALLOW_RETRY at the very first page fault
(which allows the first page fault in an unmapped area to be always able
to block indefinitely by being allowed to release the mmap_sem).

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Reviewed-by: Andres Lagar-Cavilla <andreslc@google.com>
Reviewed-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Peter Feiner <pfeiner@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andrea Arcangeli
2015-02-11 15:27:28 -08:00
committed by Linus Torvalds
parent 7e33912849
commit 0664e57ff0
3 changed files with 5 additions and 58 deletions
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2
virt/kvm/async_pf.c
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@@ -80,7 +80,7 @@ static void async_pf_execute(struct work_struct *work)
might_sleep();
kvm_get_user_page_io(NULL, mm, addr, 1, NULL);
get_user_pages_unlocked(NULL, mm, addr, 1, 1, 0, NULL);
kvm_async_page_present_sync(vcpu, apf);
spin_lock(&vcpu->async_pf.lock);