+static int vmap_pages_range_noflush(unsigned long start, unsigned long end,
+				    pgprot_t prot, struct page **pages,
+				    unsigned int page_shift)
+{
+	if (page_shift == PAGE_SIZE) {

Is this a typo of PAGE_SHIFT?

+		return vmap_small_pages_range_noflush(start, end, prot, pages);
+	} else {
+		unsigned long addr = start;
+		unsigned int i, nr = (end - start) >> page_shift;
+
+		for (i = 0; i < nr; i++) {
+			int err;
+
+			err = vmap_range_noflush(addr,
+					addr + (1UL << page_shift),
+					__pa(page_address(pages[i])), prot,
+					page_shift);
+			if (err)
+				return err;
+
+			addr += 1UL << page_shift;
+		}
+
+		return 0;
+	}
+}
+

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