[PATCH v6 02/12] MMU notifier: use the new mmap locking API

[Michel Lespinasse]

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 <wal...@google.com>
Reviewed-by: Daniel Jordan <daniel.m.jor...@oracle.com>
Reviewed-by: Davidlohr Bueso <dbu...@suse.de>
Reviewed-by: Laurent Dufour <lduf...@linux.ibm.com>
Reviewed-by: Vlastimil Babka <vba...@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);
-- 
2.26.2.761.g0e0b3e54be-goog