Merge branch 'clocksource/cleanup' into next/cleanup

Clockevent cleanup series from Shawn Guo.

Resolved move/change conflict in mach-pxa/time.c due to the sys_timer
cleanup.

* clocksource/cleanup:
  clocksource: use clockevents_config_and_register() where possible
  ARM: use clockevents_config_and_register() where possible
  clockevents: export clockevents_config_and_register for module use
  + sync to Linux 3.8-rc3

Signed-off-by: Olof Johansson <olof@lixom.net>

Conflicts:
	arch/arm/mach-pxa/time.c

4 files changed, 17 insertions, 53 deletions

diff --git a/mm/memory.c b/mm/memory.c
index e0a9b0ce4f10..bb1369f7b9b4 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -184,10 +184,14 @@ static int tlb_next_batch(struct mmu_gather *tlb)
                 return 1;
         }
 
+        if (tlb->batch_count == MAX_GATHER_BATCH_COUNT)
+                return 0;
+
         batch = (void *)__get_free_pages(GFP_NOWAIT | __GFP_NOWARN, 0);
         if (!batch)
                 return 0;
 
+        tlb->batch_count++;
         batch->next = NULL;
         batch->nr   = 0;
         batch->max  = MAX_GATHER_BATCH;
@@ -216,6 +220,7 @@ void tlb_gather_mmu(struct mmu_gather *tlb, struct mm_struct *mm, bool fullmm)
         tlb->local.nr   = 0;
         tlb->local.max  = ARRAY_SIZE(tlb->__pages);
         tlb->active     = &tlb->local;
+        tlb->batch_count = 0;
 
 #ifdef CONFIG_HAVE_RCU_TABLE_FREE
         tlb->batch = NULL;
@@ -3706,6 +3711,14 @@ retry:
                 if (pmd_trans_huge(orig_pmd)) {
                         unsigned int dirty = flags & FAULT_FLAG_WRITE;
 
+                        /*
+                         * If the pmd is splitting, return and retry the
+                         * the fault.  Alternative: wait until the split
+                         * is done, and goto retry.
+                         */
+                        if (pmd_trans_splitting(orig_pmd))
+                                return 0;
+
                         if (pmd_numa(orig_pmd))
                                 return do_huge_pmd_numa_page(mm, vma, address,
                                                              orig_pmd, pmd);
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 4ba5e37127fc..bc6cc0e913bd 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -221,11 +221,6 @@ EXPORT_SYMBOL(nr_online_nodes);
 
 int page_group_by_mobility_disabled __read_mostly;
 
-/*
- * NOTE:
- * Don't use set_pageblock_migratetype(page, MIGRATE_ISOLATE) directly.
- * Instead, use {un}set_pageblock_isolate.
- */
 void set_pageblock_migratetype(struct page *page, int migratetype)
 {
 
@@ -1655,20 +1650,6 @@ static bool __zone_watermark_ok(struct zone *z, int order, unsigned long mark,
         return true;
 }
 
-#ifdef CONFIG_MEMORY_ISOLATION
-static inline unsigned long nr_zone_isolate_freepages(struct zone *zone)
-{
-        if (unlikely(zone->nr_pageblock_isolate))
-                return zone->nr_pageblock_isolate * pageblock_nr_pages;
-        return 0;
-}
-#else
-static inline unsigned long nr_zone_isolate_freepages(struct zone *zone)
-{
-        return 0;
-}
-#endif
-
 bool zone_watermark_ok(struct zone *z, int order, unsigned long mark,
                       int classzone_idx, int alloc_flags)
 {
@@ -1684,14 +1665,6 @@ bool zone_watermark_ok_safe(struct zone *z, int order, unsigned long mark,
         if (z->percpu_drift_mark && free_pages < z->percpu_drift_mark)
                 free_pages = zone_page_state_snapshot(z, NR_FREE_PAGES);
 
-        /*
-         * If the zone has MIGRATE_ISOLATE type free pages, we should consider
-         * it.  nr_zone_isolate_freepages is never accurate so kswapd might not
-         * sleep although it could do so.  But this is more desirable for memory
-         * hotplug than sleeping which can cause a livelock in the direct
-         * reclaim path.
-         */
-        free_pages -= nr_zone_isolate_freepages(z);
         return __zone_watermark_ok(z, order, mark, classzone_idx, alloc_flags,
                                                                 free_pages);
 }
diff --git a/mm/page_isolation.c b/mm/page_isolation.c
index 9d2264ea4606..383bdbb98b04 100644
--- a/mm/page_isolation.c
+++ b/mm/page_isolation.c
@@ -8,28 +8,6 @@
 #include <linux/memory.h>
 #include "internal.h"
 
-/* called while holding zone->lock */
-static void set_pageblock_isolate(struct page *page)
-{
-        if (get_pageblock_migratetype(page) == MIGRATE_ISOLATE)
-                return;
-
-        set_pageblock_migratetype(page, MIGRATE_ISOLATE);
-        page_zone(page)->nr_pageblock_isolate++;
-}
-
-/* called while holding zone->lock */
-static void restore_pageblock_isolate(struct page *page, int migratetype)
-{
-        struct zone *zone = page_zone(page);
-        if (WARN_ON(get_pageblock_migratetype(page) != MIGRATE_ISOLATE))
-                return;
-
-        BUG_ON(zone->nr_pageblock_isolate <= 0);
-        set_pageblock_migratetype(page, migratetype);
-        zone->nr_pageblock_isolate--;
-}
-
 int set_migratetype_isolate(struct page *page, bool skip_hwpoisoned_pages)
 {
         struct zone *zone;
@@ -80,7 +58,7 @@ out:
                 unsigned long nr_pages;
                 int migratetype = get_pageblock_migratetype(page);
 
-                set_pageblock_isolate(page);
+                set_pageblock_migratetype(page, MIGRATE_ISOLATE);
                 nr_pages = move_freepages_block(zone, page, MIGRATE_ISOLATE);
 
                 __mod_zone_freepage_state(zone, -nr_pages, migratetype);
@@ -103,7 +81,7 @@ void unset_migratetype_isolate(struct page *page, unsigned migratetype)
                 goto out;
         nr_pages = move_freepages_block(zone, page, migratetype);
         __mod_zone_freepage_state(zone, nr_pages, migratetype);
-        restore_pageblock_isolate(page, migratetype);
+        set_pageblock_migratetype(page, migratetype);
 out:
         spin_unlock_irqrestore(&zone->lock, flags);
 }
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 16b42af393ac..196709f5ee58 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -3122,8 +3122,8 @@ unsigned long shrink_all_memory(unsigned long nr_to_reclaim)
    not required for correctness.  So if the last cpu in a node goes
    away, we get changed to run anywhere: as the first one comes back,
    restore their cpu bindings. */
-static int __devinit cpu_callback(struct notifier_block *nfb,
-                                  unsigned long action, void *hcpu)
+static int cpu_callback(struct notifier_block *nfb, unsigned long action,
+                        void *hcpu)
 {
         int nid;