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authorGlenn Elliott <gelliott@cs.unc.edu>2012-03-04 19:47:13 -0500
committerGlenn Elliott <gelliott@cs.unc.edu>2012-03-04 19:47:13 -0500
commitc71c03bda1e86c9d5198c5d83f712e695c4f2a1e (patch)
treeecb166cb3e2b7e2adb3b5e292245fefd23381ac8 /fs/ceph/pagelist.c
parentea53c912f8a86a8567697115b6a0d8152beee5c8 (diff)
parent6a00f206debf8a5c8899055726ad127dbeeed098 (diff)
Merge branch 'mpi-master' into wip-k-fmlpwip-k-fmlp
Conflicts: litmus/sched_cedf.c
Diffstat (limited to 'fs/ceph/pagelist.c')
-rw-r--r--fs/ceph/pagelist.c63
1 files changed, 0 insertions, 63 deletions
diff --git a/fs/ceph/pagelist.c b/fs/ceph/pagelist.c
deleted file mode 100644
index 46a368b6dce5..000000000000
--- a/fs/ceph/pagelist.c
+++ /dev/null
@@ -1,63 +0,0 @@
1
2#include <linux/gfp.h>
3#include <linux/pagemap.h>
4#include <linux/highmem.h>
5
6#include "pagelist.h"
7
8static void ceph_pagelist_unmap_tail(struct ceph_pagelist *pl)
9{
10 struct page *page = list_entry(pl->head.prev, struct page,
11 lru);
12 kunmap(page);
13}
14
15int ceph_pagelist_release(struct ceph_pagelist *pl)
16{
17 if (pl->mapped_tail)
18 ceph_pagelist_unmap_tail(pl);
19
20 while (!list_empty(&pl->head)) {
21 struct page *page = list_first_entry(&pl->head, struct page,
22 lru);
23 list_del(&page->lru);
24 __free_page(page);
25 }
26 return 0;
27}
28
29static int ceph_pagelist_addpage(struct ceph_pagelist *pl)
30{
31 struct page *page = __page_cache_alloc(GFP_NOFS);
32 if (!page)
33 return -ENOMEM;
34 pl->room += PAGE_SIZE;
35 list_add_tail(&page->lru, &pl->head);
36 if (pl->mapped_tail)
37 ceph_pagelist_unmap_tail(pl);
38 pl->mapped_tail = kmap(page);
39 return 0;
40}
41
42int ceph_pagelist_append(struct ceph_pagelist *pl, void *buf, size_t len)
43{
44 while (pl->room < len) {
45 size_t bit = pl->room;
46 int ret;
47
48 memcpy(pl->mapped_tail + (pl->length & ~PAGE_CACHE_MASK),
49 buf, bit);
50 pl->length += bit;
51 pl->room -= bit;
52 buf += bit;
53 len -= bit;
54 ret = ceph_pagelist_addpage(pl);
55 if (ret)
56 return ret;
57 }
58
59 memcpy(pl->mapped_tail + (pl->length & ~PAGE_CACHE_MASK), buf, len);
60 pl->length += len;
61 pl->room -= len;
62 return 0;
63}