Re: [PATCH v4 02/10] MMU notifier: use the new mmap locking API

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On Tue, 14 Apr 2020, 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@xxxxxxxxxx>
Reviewed-by: Daniel Jordan <daniel.m.jordan@xxxxxxxxxx>

Reviewed-by: Davidlohr Bueso <dbueso@xxxxxxx>

---
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);
--
2.26.0.110.g2183baf09c-goog





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