4 files changed, 2 insertions, 83 deletions

diff --git a/include/asm-i386/unistd.h b/include/asm-i386/unistd.h
index 0f92e78dfea1..fe38b9a96233 100644
--- a/include/asm-i386/unistd.h
+++ b/include/asm-i386/unistd.h
@@ -256,7 +256,7 @@
 #define __NR_io_submit          248
 #define __NR_io_cancel          249
 #define __NR_fadvise64          250
-#define __NR_set_zone_reclaim   251
+/* 251 is available for reuse (was briefly sys_set_zone_reclaim) */
 #define __NR_exit_group         252
 #define __NR_lookup_dcookie     253
 #define __NR_epoll_create       254
diff --git a/include/asm-ia64/unistd.h b/include/asm-ia64/unistd.h
index 6d96a67439be..2bf543493cb8 100644
--- a/include/asm-ia64/unistd.h
+++ b/include/asm-ia64/unistd.h
@@ -265,7 +265,7 @@
 #define __NR_keyctl                     1273
 #define __NR_ioprio_set                 1274
 #define __NR_ioprio_get                 1275
-#define __NR_set_zone_reclaim           1276
+/* 1276 is available for reuse (was briefly sys_set_zone_reclaim) */
 #define __NR_inotify_init               1277
 #define __NR_inotify_add_watch          1278
 #define __NR_inotify_rm_watch           1279
diff --git a/include/linux/swap.h b/include/linux/swap.h
index 508668f840b6..bd6641784107 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -172,7 +172,6 @@ extern void swap_setup(void);
 
 /* linux/mm/vmscan.c */
 extern int try_to_free_pages(struct zone **, gfp_t);
-extern int zone_reclaim(struct zone *, gfp_t, unsigned int);
 extern int shrink_all_memory(int);
 extern int vm_swappiness;
 
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 795a050fe471..b2baca7645d7 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -74,9 +74,6 @@ struct scan_control {
 
         int may_writepage;
 
-        /* Can pages be swapped as part of reclaim? */
-        int may_swap;
-
         /* This context's SWAP_CLUSTER_MAX. If freeing memory for
          * suspend, we effectively ignore SWAP_CLUSTER_MAX.
          * In this context, it doesn't matter that we scan the
@@ -430,8 +427,6 @@ static int shrink_list(struct list_head *page_list, struct scan_control *sc)
                  * Try to allocate it some swap space here.
                  */
                 if (PageAnon(page) && !PageSwapCache(page)) {
-                        if (!sc->may_swap)
-                                goto keep_locked;
                         if (!add_to_swap(page))
                                 goto activate_locked;
                 }
@@ -952,7 +947,6 @@ int try_to_free_pages(struct zone **zones, gfp_t gfp_mask)
 
         sc.gfp_mask = gfp_mask;
         sc.may_writepage = 0;
-        sc.may_swap = 1;
 
         inc_page_state(allocstall);
 
@@ -1055,7 +1049,6 @@ loop_again:
         total_reclaimed = 0;
         sc.gfp_mask = GFP_KERNEL;
         sc.may_writepage = 0;
-        sc.may_swap = 1;
         sc.nr_mapped = read_page_state(nr_mapped);
 
         inc_page_state(pageoutrun);
@@ -1353,76 +1346,3 @@ static int __init kswapd_init(void)
 }
 
 module_init(kswapd_init)
-
-
-/*
- * Try to free up some pages from this zone through reclaim.
- */
-int zone_reclaim(struct zone *zone, gfp_t gfp_mask, unsigned int order)
-{
-        struct scan_control sc;
-        int nr_pages = 1 << order;
-        int total_reclaimed = 0;
-
-        /* The reclaim may sleep, so don't do it if sleep isn't allowed */
-        if (!(gfp_mask & __GFP_WAIT))
-                return 0;
-        if (zone->all_unreclaimable)
-                return 0;
-
-        sc.gfp_mask = gfp_mask;
-        sc.may_writepage = 0;
-        sc.may_swap = 0;
-        sc.nr_mapped = read_page_state(nr_mapped);
-        sc.nr_scanned = 0;
-        sc.nr_reclaimed = 0;
-        /* scan at the highest priority */
-        sc.priority = 0;
-        disable_swap_token();
-
-        if (nr_pages > SWAP_CLUSTER_MAX)
-                sc.swap_cluster_max = nr_pages;
-        else
-                sc.swap_cluster_max = SWAP_CLUSTER_MAX;
-
-        /* Don't reclaim the zone if there are other reclaimers active */
-        if (atomic_read(&zone->reclaim_in_progress) > 0)
-                goto out;
-
-        shrink_zone(zone, &sc);
-        total_reclaimed = sc.nr_reclaimed;
-
- out:
-        return total_reclaimed;
-}
-
-asmlinkage long sys_set_zone_reclaim(unsigned int node, unsigned int zone,
-                                     unsigned int state)
-{
-        struct zone *z;
-        int i;
-
-        if (!capable(CAP_SYS_ADMIN))
-                return -EACCES;
-
-        if (node >= MAX_NUMNODES || !node_online(node))
-                return -EINVAL;
-
-        /* This will break if we ever add more zones */
-        if (!(zone & (1<<ZONE_DMA|1<<ZONE_NORMAL|1<<ZONE_HIGHMEM)))
-                return -EINVAL;
-
-        for (i = 0; i < MAX_NR_ZONES; i++) {
-                if (!(zone & 1<<i))
-                        continue;
-
-                z = &NODE_DATA(node)->node_zones[i];
-
-                if (state)
-                        z->reclaim_pages = 1;
-                else
-                        z->reclaim_pages = 0;
-        }
-
-        return 0;
-}