[PATCH 22/24] swap: make swap_cluster_readahead static

[Kairui Song]

From: Kairui Song <kasong@xxxxxxxxxxx>

Now there is no caller outside the same file, make it static.

Signed-off-by: Kairui Song <kasong@xxxxxxxxxxx>
---
 mm/swap.h       | 8 --------
 mm/swap_state.c | 4 ++--
 2 files changed, 2 insertions(+), 10 deletions(-)

diff --git a/mm/swap.h b/mm/swap.h
index 4402970547e7..795a25df87da 100644
--- a/mm/swap.h
+++ b/mm/swap.h
@@ -56,8 +56,6 @@ struct page *read_swap_cache_async(swp_entry_t entry, gfp_t gfp_mask,
 struct page *__read_swap_cache_async(swp_entry_t entry, gfp_t gfp_mask,
 				     struct mempolicy *mpol, pgoff_t ilx,
 				     bool *new_page_allocated);
-struct page *swap_cluster_readahead(swp_entry_t entry, gfp_t flag,
-				    struct mempolicy *mpol, pgoff_t ilx);
 struct page *swapin_readahead(swp_entry_t entry, gfp_t flag,
 			      struct vm_fault *vmf, enum swap_cache_result *result);
 struct page *swapin_page_non_fault(swp_entry_t entry, gfp_t gfp_mask,
@@ -93,12 +91,6 @@ static inline void show_swap_cache_info(void)
 {
 }
 
-static inline struct page *swap_cluster_readahead(swp_entry_t entry,
-			gfp_t gfp_mask, struct mempolicy *mpol, pgoff_t ilx)
-{
-	return NULL;
-}
-
 static inline struct page *swapin_readahead(swp_entry_t swp, gfp_t gfp_mask,
 			struct vm_fault *vmf, enum swap_cache_result *result)
 {
diff --git a/mm/swap_state.c b/mm/swap_state.c
index 0433a2586c6d..b377e55cb850 100644
--- a/mm/swap_state.c
+++ b/mm/swap_state.c
@@ -627,8 +627,8 @@ static unsigned long swapin_nr_pages(unsigned long offset)
  * are used for every page of the readahead: neighbouring pages on swap
  * are fairly likely to have been swapped out from the same node.
  */
-struct page *swap_cluster_readahead(swp_entry_t entry, gfp_t gfp_mask,
-				    struct mempolicy *mpol, pgoff_t ilx)
+static struct page *swap_cluster_readahead(swp_entry_t entry, gfp_t gfp_mask,
+					   struct mempolicy *mpol, pgoff_t ilx)
 {
 	struct page *page;
 	unsigned long entry_offset = swp_offset(entry);
-- 
2.42.0