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Diffstat (limited to 'fs/nfs/pagelist.c')
-rw-r--r--fs/nfs/pagelist.c16
1 files changed, 11 insertions, 5 deletions
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index d53857b148e..106aca388eb 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -85,6 +85,9 @@ nfs_create_request(struct nfs_open_context *ctx, struct inode *inode,
atomic_set(&req->wb_complete, 0);
req->wb_index = page->index;
page_cache_get(page);
+ BUG_ON(PagePrivate(page));
+ BUG_ON(!PageLocked(page));
+ BUG_ON(page->mapping->host != inode);
req->wb_offset = offset;
req->wb_pgbase = offset;
req->wb_bytes = count;
@@ -132,9 +135,11 @@ void nfs_clear_page_writeback(struct nfs_page *req)
{
struct nfs_inode *nfsi = NFS_I(req->wb_context->dentry->d_inode);
- spin_lock(&nfsi->req_lock);
- radix_tree_tag_clear(&nfsi->nfs_page_tree, req->wb_index, NFS_PAGE_TAG_WRITEBACK);
- spin_unlock(&nfsi->req_lock);
+ if (req->wb_page != NULL) {
+ spin_lock(&nfsi->req_lock);
+ radix_tree_tag_clear(&nfsi->nfs_page_tree, req->wb_index, NFS_PAGE_TAG_WRITEBACK);
+ spin_unlock(&nfsi->req_lock);
+ }
nfs_unlock_request(req);
}
@@ -147,8 +152,9 @@ void nfs_clear_page_writeback(struct nfs_page *req)
*/
void nfs_clear_request(struct nfs_page *req)
{
- if (req->wb_page) {
- page_cache_release(req->wb_page);
+ struct page *page = req->wb_page;
+ if (page != NULL) {
+ page_cache_release(page);
req->wb_page = NULL;
}
}