[PATCH 3/2] mm/remap_pfn_range: restore missing flush

[Jeremy Fitzhardinge]

Restore the cache flush and BUG_ON removed in the conversion to using
apply_to_page_range().

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
---
mm/memory.c |    4 ++++
1 file changed, 4 insertions(+)

===================================================================
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1484,6 +1484,8 @@
	struct remap_data *rmd = data;
	pte_t pte = pte_mkspecial(pfn_pte(rmd->pfn++, rmd->prot));

+	BUG_ON(!pte_none(*ptep));
+
	set_pte_at(rmd->mm, addr, ptep, pte);

	return 0;
@@ -1535,6 +1537,8 @@

	BUG_ON(addr >= end);

+	flush_cache_range(vma, addr, end);
+
	rmd.mm = mm;
	rmd.pfn = pfn;
	rmd.prot = prot;


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