mm, compaction: add per-zone migration pfn cache for async compaction

[platform/adaptation/renesas_rcar/renesas_kernel.git] / mm / internal.h

diff --git a/mm/internal.h b/mm/internal.h
index 29e1e76..07b6736 100644 (file)
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -11,6 +11,7 @@
 #ifndef __MM_INTERNAL_H
 #define __MM_INTERNAL_H
 
+#include <linux/fs.h>
 #include <linux/mm.h>
 
 void free_pgtables(struct mmu_gather *tlb, struct vm_area_struct *start_vma,
@@ -21,6 +22,20 @@ static inline void set_page_count(struct page *page, int v)
        atomic_set(&page->_count, v);
 }
 
+extern int __do_page_cache_readahead(struct address_space *mapping,
+               struct file *filp, pgoff_t offset, unsigned long nr_to_read,
+               unsigned long lookahead_size);
+
+/*
+ * Submit IO for the read-ahead request in file_ra_state.
+ */
+static inline unsigned long ra_submit(struct file_ra_state *ra,
+               struct address_space *mapping, struct file *filp)
+{
+       return __do_page_cache_readahead(mapping, filp,
+                                       ra->start, ra->size, ra->async_size);
+}
+
 /*
  * Turn a non-refcounted page (->_count == 0) into refcounted with
  * a count of one.
@@ -370,5 +385,6 @@ unsigned long reclaim_clean_pages_from_list(struct zone *zone,
 #define ALLOC_HIGH             0x20 /* __GFP_HIGH set */
 #define ALLOC_CPUSET           0x40 /* check for correct cpuset */
 #define ALLOC_CMA              0x80 /* allow allocations from CMA areas */
+#define ALLOC_FAIR             0x100 /* fair zone allocation */
 
 #endif /* __MM_INTERNAL_H */