mm: kill page_queue_congested()

page_queue_congested() was introduced in 2002, but it was never used

Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/swapfile.c b/mm/swapfile.c
index f287458..eec5ca7 100644 (file)
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -1372,26 +1372,6 @@ out:
        return ret;
 }
 
-#if 0  /* We don't need this yet */
-#include <linux/backing-dev.h>
-int page_queue_congested(struct page *page)
-{
-       struct backing_dev_info *bdi;
-
-       VM_BUG_ON(!PageLocked(page));   /* It pins the swap_info_struct */
-
-       if (PageSwapCache(page)) {
-               swp_entry_t entry = { .val = page_private(page) };
-               struct swap_info_struct *sis;
-
-               sis = get_swap_info_struct(swp_type(entry));
-               bdi = sis->bdev->bd_inode->i_mapping->backing_dev_info;
-       } else
-               bdi = page->mapping->backing_dev_info;
-       return bdi_write_congested(bdi);
-}
-#endif
-
 asmlinkage long sys_swapoff(const char __user * specialfile)
 {
        struct swap_info_struct * p = NULL;