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-rw-r--r--mm/page_io.c5
-rw-r--r--mm/swapfile.c13
2 files changed, 13 insertions, 5 deletions
diff --git a/mm/page_io.c b/mm/page_io.c
index 485fa5cca4a2..c493ce9ebcf5 100644
--- a/mm/page_io.c
+++ b/mm/page_io.c
@@ -254,11 +254,6 @@ out:
return ret;
}
-static sector_t swap_page_sector(struct page *page)
-{
- return (sector_t)__page_file_index(page) << (PAGE_SHIFT - 9);
-}
-
static inline void count_swpout_vm_event(struct page *page)
{
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
diff --git a/mm/swapfile.c b/mm/swapfile.c
index f039745989d2..084a5b9a18e5 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -219,6 +219,19 @@ offset_to_swap_extent(struct swap_info_struct *sis, unsigned long offset)
BUG();
}
+sector_t swap_page_sector(struct page *page)
+{
+ struct swap_info_struct *sis = page_swap_info(page);
+ struct swap_extent *se;
+ sector_t sector;
+ pgoff_t offset;
+
+ offset = __page_file_index(page);
+ se = offset_to_swap_extent(sis, offset);
+ sector = se->start_block + (offset - se->start_page);
+ return sector << (PAGE_SHIFT - 9);
+}
+
/*
* swap allocation tell device that a cluster of swap can now be discarded,
* to allow the swap device to optimize its wear-levelling.