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authorFengguang Wu <wfg@mail.ustc.edu.cn>2007-10-16 01:24:36 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-16 09:42:52 -0700
commit535443f51543df61111bbd234300ae549d220448 (patch)
treee9b022969776132b9fd3bde351673edc006a1bac /mm/readahead.c
parent7ff81078d8b9f3d05a27b7bd3786ffb1ef1b0d1f (diff)
downloadlwn-535443f51543df61111bbd234300ae549d220448.tar.gz
lwn-535443f51543df61111bbd234300ae549d220448.zip
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>
Diffstat (limited to 'mm/readahead.c')
-rw-r--r--mm/readahead.c10
1 files changed, 1 insertions, 9 deletions
diff --git a/mm/readahead.c b/mm/readahead.c
index fd588ffc5086..fc52f9f1b80c 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -22,16 +22,8 @@ void default_unplug_io_fn(struct backing_dev_info *bdi, struct page *page)
}
EXPORT_SYMBOL(default_unplug_io_fn);
-/*
- * Convienent macros for min/max read-ahead pages.
- * Note that MAX_RA_PAGES is rounded down, while MIN_RA_PAGES is rounded up.
- * The latter is necessary for systems with large page size(i.e. 64k).
- */
-#define MAX_RA_PAGES (VM_MAX_READAHEAD*1024 / PAGE_CACHE_SIZE)
-#define MIN_RA_PAGES DIV_ROUND_UP(VM_MIN_READAHEAD*1024, PAGE_CACHE_SIZE)
-
struct backing_dev_info default_backing_dev_info = {
- .ra_pages = MAX_RA_PAGES,
+ .ra_pages = VM_MAX_READAHEAD * 1024 / PAGE_CACHE_SIZE,
.state = 0,
.capabilities = BDI_CAP_MAP_COPY,
.unplug_io_fn = default_unplug_io_fn,