[PATCH][mm-next] mm, swap: make bool enable_vma_readahead and function swap_vma_readahead static

[Colin King <colin.king@canonical.com>]

From: Colin Ian King <colin.king@canonical.com>

The bool enable_vma_readahead and function swap_vma_readahead are local
to the source and do not need to be in global scope, so make them static.

Cleans up sparse warnings:
mm/swap_state.c:41:6: warning: symbol 'enable_vma_readahead' was not
declared. Should it be static?
mm/swap_state.c:742:13: warning: symbol 'swap_vma_readahead' was not
declared. Should it be static?

Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
 mm/swap_state.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/mm/swap_state.c b/mm/swap_state.c
index 8dde719e973c..f3952138f01d 100644
--- a/mm/swap_state.c
+++ b/mm/swap_state.c
@@ -38,7 +38,7 @@ static const struct address_space_operations swap_aops = {
 
 struct address_space *swapper_spaces[MAX_SWAPFILES] __read_mostly;
 static unsigned int nr_swapper_spaces[MAX_SWAPFILES] __read_mostly;
-bool enable_vma_readahead __read_mostly = true;
+static bool enable_vma_readahead __read_mostly = true;
 
 #define SWAP_RA_WIN_SHIFT	(PAGE_SHIFT / 2)
 #define SWAP_RA_HITS_MASK	((1UL << SWAP_RA_WIN_SHIFT) - 1)
@@ -739,8 +739,8 @@ static void swap_ra_info(struct vm_fault *vmf,
 	pte_unmap(orig_pte);
 }
 
-struct page *swap_vma_readahead(swp_entry_t fentry, gfp_t gfp_mask,
-				    struct vm_fault *vmf)
+static struct page *swap_vma_readahead(swp_entry_t fentry, gfp_t gfp_mask,
+				       struct vm_fault *vmf)
 {
 	struct blk_plug plug;
 	struct vm_area_struct *vma = vmf->vma;
-- 
2.15.1