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authorTrond Myklebust <Trond.Myklebust@netapp.com>2010-02-20 04:03:21 +0300
committerTrond Myklebust <Trond.Myklebust@netapp.com>2010-03-05 23:44:55 +0300
commitc988950eb6dd6f8e6d98503ca094622729e9aa13 (patch)
tree5a5b34050d4f20909e7378108aa131e615ef52cd
parent2928db1ffeacc9717c2d5c230d450bcc377b3ae9 (diff)
downloadlinux-c988950eb6dd6f8e6d98503ca094622729e9aa13.tar.xz
NFS: Simplify nfs_wb_page_cancel()
In all cases we should be able to just remove the request and call cancel_dirty_page(). Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
-rw-r--r--fs/nfs/write.c39
-rw-r--r--include/linux/nfs_fs.h2
2 files changed, 1 insertions, 40 deletions
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index e40e949598fd..dc7f5e9a23b4 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -540,19 +540,6 @@ static int nfs_wait_on_requests_locked(struct inode *inode, pgoff_t idx_start, u
return res;
}
-static void nfs_cancel_commit_list(struct list_head *head)
-{
- struct nfs_page *req;
-
- while(!list_empty(head)) {
- req = nfs_list_entry(head->next);
- nfs_list_remove_request(req);
- nfs_clear_request_commit(req);
- nfs_inode_remove_request(req);
- nfs_unlock_request(req);
- }
-}
-
#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
static int
nfs_need_commit(struct nfs_inode *nfsi)
@@ -1495,13 +1482,6 @@ long nfs_sync_mapping_wait(struct address_space *mapping, struct writeback_contr
pages = nfs_scan_commit(inode, &head, idx_start, npages);
if (pages == 0)
break;
- if (how & FLUSH_INVALIDATE) {
- spin_unlock(&inode->i_lock);
- nfs_cancel_commit_list(&head);
- ret = pages;
- spin_lock(&inode->i_lock);
- continue;
- }
pages += nfs_scan_commit(inode, &head, 0, 0);
spin_unlock(&inode->i_lock);
ret = nfs_commit_list(inode, &head, how);
@@ -1558,26 +1538,13 @@ int nfs_wb_nocommit(struct inode *inode)
int nfs_wb_page_cancel(struct inode *inode, struct page *page)
{
struct nfs_page *req;
- loff_t range_start = page_offset(page);
- loff_t range_end = range_start + (loff_t)(PAGE_CACHE_SIZE - 1);
- struct writeback_control wbc = {
- .bdi = page->mapping->backing_dev_info,
- .sync_mode = WB_SYNC_ALL,
- .nr_to_write = LONG_MAX,
- .range_start = range_start,
- .range_end = range_end,
- };
int ret = 0;
BUG_ON(!PageLocked(page));
for (;;) {
req = nfs_page_find_request(page);
if (req == NULL)
- goto out;
- if (test_bit(PG_CLEAN, &req->wb_flags)) {
- nfs_release_request(req);
break;
- }
if (nfs_lock_request_dontget(req)) {
nfs_inode_remove_request(req);
/*
@@ -1591,12 +1558,8 @@ int nfs_wb_page_cancel(struct inode *inode, struct page *page)
ret = nfs_wait_on_request(req);
nfs_release_request(req);
if (ret < 0)
- goto out;
+ break;
}
- if (!PagePrivate(page))
- return 0;
- ret = nfs_sync_mapping_wait(page->mapping, &wbc, FLUSH_INVALIDATE);
-out:
return ret;
}
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index 309217f46e28..1083134c02ff 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -34,8 +34,6 @@
#define FLUSH_LOWPRI 8 /* low priority background flush */
#define FLUSH_HIGHPRI 16 /* high priority memory reclaim flush */
#define FLUSH_NOCOMMIT 32 /* Don't send the NFSv3/v4 COMMIT */
-#define FLUSH_INVALIDATE 64 /* Invalidate the page cache */
-#define FLUSH_NOWRITEPAGE 128 /* Don't call writepage() */
#ifdef __KERNEL__