+struct vm_area_struct *find_vma_srcu(struct mm_struct *mm, unsigned long addr)
+{
+	struct vm_area_struct *vma;
+	unsigned int seq;
+
+	WARN_ON_ONCE(!srcu_read_lock_held(&vma_srcu));
+
+	do {
+		seq = read_seqbegin(&mm->mm_seq);
+		vma = __find_vma(mm, addr);

will the __find_vma() loops for ever due to the rotations in the RBtree?

+	} while (read_seqretry(&mm->mm_seq, seq));
+
+	return vma;
+}

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