readahead: remove several readahead macros

Remove VM_MAX_CACHE_HIT, MAX_RA_PAGES and MIN_RA_PAGES.

Signed-off-by: Fengguang Wu <wfg@mail.ustc.edu.cn>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 0 insertions, 2 deletions

diff --git a/include/linux/mm.h b/include/linux/mm.h
index fbff8e481cc4..291c4cc06ea7 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1106,8 +1106,6 @@ int write_one_page(struct page *page, int wait);
 /* readahead.c */
 #define VM_MAX_READAHEAD        128     /* kbytes */
 #define VM_MIN_READAHEAD        16      /* kbytes (includes current page) */
-#define VM_MAX_CACHE_HIT        256     /* max pages in a row in cache before
-                                         * turning readahead off */
 
 int do_page_cache_readahead(struct address_space *mapping, struct file *filp,
                         pgoff_t offset, unsigned long nr_to_read);