Merge branch 'akpm' (updates from Andrew Morton)

Merge first patch-bomb from Andrew Morton:
 - various misc bits
 - I'm been patchmonkeying ocfs2 for a while, as Joel and Mark have been
   distracted.  There has been quite a bit of activity.
 - About half the MM queue
 - Some backlight bits
 - Various lib/ updates
 - checkpatch updates
 - zillions more little rtc patches
 - ptrace
 - signals
 - exec
 - procfs
 - rapidio
 - nbd
 - aoe
 - pps
 - memstick
 - tools/testing/selftests updates

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (445 commits)
  tools/testing/selftests: don't assume the x bit is set on scripts
  selftests: add .gitignore for kcmp
  selftests: fix clean target in kcmp Makefile
  selftests: add .gitignore for vm
  selftests: add hugetlbfstest
  self-test: fix make clean
  selftests: exit 1 on failure
  kernel/resource.c: remove the unneeded assignment in function __find_resource
  aio: fix wrong comment in aio_complete()
  drivers/w1/slaves/w1_ds2408.c: add magic sequence to disable P0 test mode
  drivers/memstick/host/r592.c: convert to module_pci_driver
  drivers/memstick/host/jmb38x_ms: convert to module_pci_driver
  pps-gpio: add device-tree binding and support
  drivers/pps/clients/pps-gpio.c: convert to module_platform_driver
  drivers/pps/clients/pps-gpio.c: convert to devm_* helpers
  drivers/parport/share.c: use kzalloc
  Documentation/accounting/getdelays.c: avoid strncpy in accounting tool
  aoe: update internal version number to v83
  aoe: update copyright date
  aoe: perform I/O completions in parallel
  ...

1 files changed, 16 insertions, 8 deletions

diff --git a/include/linux/swap.h b/include/linux/swap.h
index 1701ce4..d95cde5 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -10,6 +10,7 @@
 #include <linux/node.h>
 #include <linux/fs.h>
 #include <linux/atomic.h>
+#include <linux/page-flags.h>
 #include <asm/page.h>
 
 struct notifier_block;
@@ -19,10 +20,13 @@ struct bio;
 #define SWAP_FLAG_PREFER	0x8000	/* set if swap priority specified */
 #define SWAP_FLAG_PRIO_MASK	0x7fff
 #define SWAP_FLAG_PRIO_SHIFT	0
-#define SWAP_FLAG_DISCARD	0x10000 /* discard swap cluster after use */
+#define SWAP_FLAG_DISCARD	0x10000 /* enable discard for swap */
+#define SWAP_FLAG_DISCARD_ONCE	0x20000 /* discard swap area at swapon-time */
+#define SWAP_FLAG_DISCARD_PAGES 0x40000 /* discard page-clusters after use */
 
 #define SWAP_FLAGS_VALID	(SWAP_FLAG_PRIO_MASK | SWAP_FLAG_PREFER | \
-				 SWAP_FLAG_DISCARD)
+				 SWAP_FLAG_DISCARD | SWAP_FLAG_DISCARD_ONCE | \
+				 SWAP_FLAG_DISCARD_PAGES)
 
 static inline int current_is_kswapd(void)
 {
@@ -146,14 +150,16 @@ struct swap_extent {
 enum {
 	SWP_USED	= (1 << 0),	/* is slot in swap_info[] used? */
 	SWP_WRITEOK	= (1 << 1),	/* ok to write to this swap?	*/
-	SWP_DISCARDABLE = (1 << 2),	/* swapon+blkdev support discard */
+	SWP_DISCARDABLE = (1 << 2),	/* blkdev support discard */
 	SWP_DISCARDING	= (1 << 3),	/* now discarding a free cluster */
 	SWP_SOLIDSTATE	= (1 << 4),	/* blkdev seeks are cheap */
 	SWP_CONTINUED	= (1 << 5),	/* swap_map has count continuation */
 	SWP_BLKDEV	= (1 << 6),	/* its a block device */
 	SWP_FILE	= (1 << 7),	/* set after swap_activate success */
+	SWP_AREA_DISCARD = (1 << 8),	/* single-time swap area discards */
+	SWP_PAGE_DISCARD = (1 << 9),	/* freed swap page-cluster discards */
 					/* add others here before... */
-	SWP_SCANNING	= (1 << 8),	/* refcount in scan_swap_map */
+	SWP_SCANNING	= (1 << 10),	/* refcount in scan_swap_map */
 };
 
 #define SWAP_CLUSTER_MAX 32UL
@@ -233,8 +239,8 @@ extern unsigned long nr_free_pagecache_pages(void);
 
 
 /* linux/mm/swap.c */
-extern void __lru_cache_add(struct page *, enum lru_list lru);
-extern void lru_cache_add_lru(struct page *, enum lru_list lru);
+extern void __lru_cache_add(struct page *);
+extern void lru_cache_add(struct page *);
 extern void lru_add_page_tail(struct page *page, struct page *page_tail,
 			 struct lruvec *lruvec, struct list_head *head);
 extern void activate_page(struct page *);
@@ -254,12 +260,14 @@ extern void add_page_to_unevictable_list(struct page *page);
  */
 static inline void lru_cache_add_anon(struct page *page)
 {
-	__lru_cache_add(page, LRU_INACTIVE_ANON);
+	ClearPageActive(page);
+	__lru_cache_add(page);
 }
 
 static inline void lru_cache_add_file(struct page *page)
 {
-	__lru_cache_add(page, LRU_INACTIVE_FILE);
+	ClearPageActive(page);
+	__lru_cache_add(page);
 }
 
 /* linux/mm/vmscan.c */