[PATCH v2 3/11] Enhance replace_page() to support pagecache

[Srikar Dronamraju <srikar@linux.vnet.ibm.com>]

Enhance replace_page() to support pagecache

Currently replace_page would work only for anonymous pages.
This patch enhances replace_page() to work for pagecache pages

This enhancement is useful for user_bkpt's replace_page based
background page replacement for insertion and removal of breakpoints.

Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
---

 mm/memory.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)


diff --git a/mm/memory.c b/mm/memory.c
index 66a3632..5acf686 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2617,7 +2617,10 @@ int replace_page(struct vm_area_struct *vma, struct page *page,
 	}
 
 	get_page(kpage);
-	page_add_anon_rmap(kpage, vma, addr);
+	if (PageAnon(kpage))
+		page_add_anon_rmap(kpage, vma, addr);
+	else
+		page_add_file_rmap(kpage);
 
 	flush_cache_page(vma, addr, pte_pfn(*ptep));
 	ptep_clear_flush(vma, addr, ptep);