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-rw-r--r--mm/truncate.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/mm/truncate.c b/mm/truncate.c
index 706cff171a15..6479ed2afc53 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -686,7 +686,17 @@ int invalidate_inode_pages2_range(struct address_space *mapping,
cond_resched();
index++;
}
-
+ /*
+ * For DAX we invalidate page tables after invalidating radix tree. We
+ * could invalidate page tables while invalidating each entry however
+ * that would be expensive. And doing range unmapping before doesn't
+ * work as we have no cheap way to find whether radix tree entry didn't
+ * get remapped later.
+ */
+ if (dax_mapping(mapping)) {
+ unmap_mapping_range(mapping, (loff_t)start << PAGE_SHIFT,
+ (loff_t)(end - start + 1) << PAGE_SHIFT, 0);
+ }
out:
cleancache_invalidate_inode(mapping);
return ret;