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authorDavid S. Miller <davem@davemloft.net>2011-08-07 23:20:26 -0700
committerDavid S. Miller <davem@davemloft.net>2011-08-07 23:20:26 -0700
commit19fd61785a580c60cba900c5171bfadb57dd5056 (patch)
tree1e491fb014be0dc03f4b6755bb94e73afd38c455 /mm/mincore.c
parent57569d0e12eaf31717e295960cd2a26f626c8e5b (diff)
parent8028837d71ba9904b17281b40f94b93e947fbe38 (diff)
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net
Diffstat (limited to 'mm/mincore.c')
-rw-r--r--mm/mincore.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/mm/mincore.c b/mm/mincore.c
index a4e6b9d75c7..636a86876ff 100644
--- a/mm/mincore.c
+++ b/mm/mincore.c
@@ -69,12 +69,15 @@ static unsigned char mincore_page(struct address_space *mapping, pgoff_t pgoff)
* file will not get a swp_entry_t in its pte, but rather it is like
* any other file mapping (ie. marked !present and faulted in with
* tmpfs's .fault). So swapped out tmpfs mappings are tested here.
- *
- * However when tmpfs moves the page from pagecache and into swapcache,
- * it is still in core, but the find_get_page below won't find it.
- * No big deal, but make a note of it.
*/
page = find_get_page(mapping, pgoff);
+#ifdef CONFIG_SWAP
+ /* shmem/tmpfs may return swap: account for swapcache page too. */
+ if (radix_tree_exceptional_entry(page)) {
+ swp_entry_t swap = radix_to_swp_entry(page);
+ page = find_get_page(&swapper_space, swap.val);
+ }
+#endif
if (page) {
present = PageUptodate(page);
page_cache_release(page);