2 files changed, 20 insertions, 2 deletions

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 16a4cc2950a0..f85ecc9cfa1b 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -369,6 +369,9 @@ struct zone {
          */
         spinlock_t              lock;
         int                     all_unreclaimable; /* All pages pinned */
+#if defined CONFIG_COMPACTION || defined CONFIG_CMA
+        unsigned long           compact_blockskip_expire;
+#endif
 #ifdef CONFIG_MEMORY_HOTPLUG
         /* see spanned/present_pages for more description */
         seqlock_t               span_seqlock;
diff --git a/include/linux/pageblock-flags.h b/include/linux/pageblock-flags.h
index 19ef95d293ae..eed27f4f4c3e 100644
--- a/include/linux/pageblock-flags.h
+++ b/include/linux/pageblock-flags.h
@@ -30,6 +30,9 @@ enum pageblock_bits {
         PB_migrate,
         PB_migrate_end = PB_migrate + 3 - 1,
                         /* 3 bits required for migrate types */
+#ifdef CONFIG_COMPACTION
+        PB_migrate_skip,/* If set the block is skipped by compaction */
+#endif /* CONFIG_COMPACTION */
         NR_PAGEBLOCK_BITS
 };
 
@@ -65,10 +68,22 @@ unsigned long get_pageblock_flags_group(struct page *page,
 void set_pageblock_flags_group(struct page *page, unsigned long flags,
                                         int start_bitidx, int end_bitidx);
 
+#ifdef CONFIG_COMPACTION
+#define get_pageblock_skip(page) \
+                        get_pageblock_flags_group(page, PB_migrate_skip,     \
+                                                        PB_migrate_skip + 1)
+#define clear_pageblock_skip(page) \
+                        set_pageblock_flags_group(page, 0, PB_migrate_skip,  \
+                                                        PB_migrate_skip + 1)
+#define set_pageblock_skip(page) \
+                        set_pageblock_flags_group(page, 1, PB_migrate_skip,  \
+                                                        PB_migrate_skip + 1)
+#endif /* CONFIG_COMPACTION */
+
 #define get_pageblock_flags(page) \
-                        get_pageblock_flags_group(page, 0, NR_PAGEBLOCK_BITS-1)
+                        get_pageblock_flags_group(page, 0, PB_migrate_end)
 #define set_pageblock_flags(page, flags) \
                         set_pageblock_flags_group(page, flags,  \
-                                                  0, NR_PAGEBLOCK_BITS-1)
+                                                  0, PB_migrate_end)
 
 #endif  /* PAGEBLOCK_FLAGS_H */