fs: cachefiles: use add_to_page_cache_lru()

This code used to have its own lru cache pagevec up until a0b8cab3 ("mm:
remove lru parameter from __pagevec_lru_add and remove parts of pagevec
API").  Now it's just add_to_page_cache() followed by lru_cache_add(),
might as well use add_to_page_cache_lru() directly.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Rik van Riel <riel@redhat.com>
Reviewed-by: Minchan Kim <minchan@kernel.org>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Bob Liu <bob.liu@oracle.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Jan Kara <jack@suse.cz>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Luigi Semenzato <semenzato@google.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Metin Doslu <metin@citusdata.com>
Cc: Michel Lespinasse <walken@google.com>
Cc: Ozgun Erdogan <ozgun@citusdata.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Roman Gushchin <klamm@yandex-team.ru>
Cc: Ryan Mallon <rmallon@gmail.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 13 insertions, 20 deletions

diff --git a/fs/cachefiles/rdwr.c b/fs/cachefiles/rdwr.c
index ebaff368120d..4b1fb5ca65b8 100644
--- a/fs/cachefiles/rdwr.c
+++ b/fs/cachefiles/rdwr.c
@@ -265,24 +265,22 @@ static int cachefiles_read_backing_file_one(struct cachefiles_object *object,
                                 goto nomem_monitor;
                 }
 
-                ret = add_to_page_cache(newpage, bmapping,
-                                        netpage->index, cachefiles_gfp);
+                ret = add_to_page_cache_lru(newpage, bmapping,
+                                            netpage->index, cachefiles_gfp);
                 if (ret == 0)
                         goto installed_new_backing_page;
                 if (ret != -EEXIST)
                         goto nomem_page;
         }
 
-        /* we've installed a new backing page, so now we need to add it
-         * to the LRU list and start it reading */
+        /* we've installed a new backing page, so now we need to start
+         * it reading */
 installed_new_backing_page:
         _debug("- new %p", newpage);
 
         backpage = newpage;
         newpage = NULL;
 
-        lru_cache_add_file(backpage);
-
 read_backing_page:
         ret = bmapping->a_ops->readpage(NULL, backpage);
         if (ret < 0)
@@ -510,24 +508,23 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object,
                                         goto nomem;
                         }
 
-                        ret = add_to_page_cache(newpage, bmapping,
-                                                netpage->index, cachefiles_gfp);
+                        ret = add_to_page_cache_lru(newpage, bmapping,
+                                                    netpage->index,
+                                                    cachefiles_gfp);
                         if (ret == 0)
                                 goto installed_new_backing_page;
                         if (ret != -EEXIST)
                                 goto nomem;
                 }
 
-                /* we've installed a new backing page, so now we need to add it
-                 * to the LRU list and start it reading */
+                /* we've installed a new backing page, so now we need
+                 * to start it reading */
         installed_new_backing_page:
                 _debug("- new %p", newpage);
 
                 backpage = newpage;
                 newpage = NULL;
 
-                lru_cache_add_file(backpage);
-
         reread_backing_page:
                 ret = bmapping->a_ops->readpage(NULL, backpage);
                 if (ret < 0)
@@ -538,8 +535,8 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object,
         monitor_backing_page:
                 _debug("- monitor add");
 
-                ret = add_to_page_cache(netpage, op->mapping, netpage->index,
-                                        cachefiles_gfp);
+                ret = add_to_page_cache_lru(netpage, op->mapping,
+                                            netpage->index, cachefiles_gfp);
                 if (ret < 0) {
                         if (ret == -EEXIST) {
                                 page_cache_release(netpage);
@@ -549,8 +546,6 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object,
                         goto nomem;
                 }
 
-                lru_cache_add_file(netpage);
-
                 /* install a monitor */
                 page_cache_get(netpage);
                 monitor->netfs_page = netpage;
@@ -613,8 +608,8 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object,
         backing_page_already_uptodate:
                 _debug("- uptodate");
 
-                ret = add_to_page_cache(netpage, op->mapping, netpage->index,
-                                        cachefiles_gfp);
+                ret = add_to_page_cache_lru(netpage, op->mapping,
+                                            netpage->index, cachefiles_gfp);
                 if (ret < 0) {
                         if (ret == -EEXIST) {
                                 page_cache_release(netpage);
@@ -631,8 +626,6 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object,
 
                 fscache_mark_page_cached(op, netpage);
 
-                lru_cache_add_file(netpage);
-
                 /* the netpage is unlocked and marked up to date here */
                 fscache_end_io(op, netpage, 0);
                 page_cache_release(netpage);