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    SubjectRe: [PATCH v5 02/10] MMU notifier: use the new mmap locking API
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    On 4/22/20 2:14 AM, Michel Lespinasse wrote:
    > This use is converted manually ahead of the next patch in the series,
    > as it requires including a new header which the automated conversion
    > would miss.
    >
    > Signed-off-by: Michel Lespinasse <walken@google.com>
    > Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com>
    > Reviewed-by: Davidlohr Bueso <dbueso@suse.de>

    Reviewed-by: Vlastimil Babka <vbabka@suse.cz>

    > ---
    > include/linux/mmu_notifier.h | 5 +++--
    > 1 file changed, 3 insertions(+), 2 deletions(-)
    >
    > diff --git a/include/linux/mmu_notifier.h b/include/linux/mmu_notifier.h
    > index 736f6918335e..2f462710a1a4 100644
    > --- a/include/linux/mmu_notifier.h
    > +++ b/include/linux/mmu_notifier.h
    > @@ -5,6 +5,7 @@
    > #include <linux/list.h>
    > #include <linux/spinlock.h>
    > #include <linux/mm_types.h>
    > +#include <linux/mmap_lock.h>
    > #include <linux/srcu.h>
    > #include <linux/interval_tree.h>
    >
    > @@ -277,9 +278,9 @@ mmu_notifier_get(const struct mmu_notifier_ops *ops, struct mm_struct *mm)
    > {
    > struct mmu_notifier *ret;
    >
    > - down_write(&mm->mmap_sem);
    > + mmap_write_lock(mm);
    > ret = mmu_notifier_get_locked(ops, mm);
    > - up_write(&mm->mmap_sem);
    > + mmap_write_unlock(mm);
    > return ret;
    > }
    > void mmu_notifier_put(struct mmu_notifier *subscription);
    >

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