[RFC:PATCH 05/09] find_get_page() and find_lock_page() need to unpack the tail

[Dave Kleikamp <shaggy@linux.vnet.ibm.com>]

find_get_page() and find_lock_page() need to unpack the tail

If the page being sought corresponds to the tail, and the tail is packed
in the inode, the tail must be unpacked.

Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
---

 mm/filemap.c |    3 +++
 1 file changed, 3 insertions(+)

diff -Nurp linux004/mm/filemap.c linux005/mm/filemap.c
--- linux004/mm/filemap.c	2007-11-07 08:14:01.000000000 -0600
+++ linux005/mm/filemap.c	2007-11-08 10:49:46.000000000 -0600
@@ -24,6 +24,7 @@
 #include <linux/file.h>
 #include <linux/uio.h>
 #include <linux/hash.h>
+#include <linux/vm_file_tail.h>
 #include <linux/writeback.h>
 #include <linux/backing-dev.h>
 #include <linux/pagevec.h>
@@ -600,6 +601,7 @@ struct page * find_get_page(struct addre
 {
 	struct page *page;
 
+	vm_file_tail_unpack_index(mapping, offset);
 	read_lock_irq(&mapping->tree_lock);
 	page = radix_tree_lookup(&mapping->page_tree, offset);
 	if (page)
@@ -624,6 +626,7 @@ struct page *find_lock_page(struct addre
 {
 	struct page *page;
 
+	vm_file_tail_unpack_index(mapping, offset);
 repeat:
 	read_lock_irq(&mapping->tree_lock);
 	page = radix_tree_lookup(&mapping->page_tree, offset);

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