1 files changed, 33 insertions, 16 deletions

diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 4cfada2cc09f..b383fdd3a15c 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -98,11 +98,10 @@ struct nfs_write_data *nfs_commit_alloc(unsigned int pagecount)
         if (p) {
                 memset(p, 0, sizeof(*p));
                 INIT_LIST_HEAD(&p->pages);
-                if (pagecount < NFS_PAGEVEC_SIZE)
-                        p->pagevec = &p->page_array[0];
+                if (pagecount <= ARRAY_SIZE(p->page_array))
+                        p->pagevec = p->page_array;
                 else {
-                        size_t size = ++pagecount * sizeof(struct page *);
-                        p->pagevec = kzalloc(size, GFP_NOFS);
+                        p->pagevec = kcalloc(pagecount, sizeof(struct page *), GFP_NOFS);
                         if (!p->pagevec) {
                                 mempool_free(p, nfs_commit_mempool);
                                 p = NULL;
@@ -126,14 +125,11 @@ struct nfs_write_data *nfs_writedata_alloc(unsigned int pagecount)
         if (p) {
                 memset(p, 0, sizeof(*p));
                 INIT_LIST_HEAD(&p->pages);
-                if (pagecount < NFS_PAGEVEC_SIZE)
-                        p->pagevec = &p->page_array[0];
+                if (pagecount <= ARRAY_SIZE(p->page_array))
+                        p->pagevec = p->page_array;
                 else {
-                        size_t size = ++pagecount * sizeof(struct page *);
-                        p->pagevec = kmalloc(size, GFP_NOFS);
-                        if (p->pagevec) {
-                                memset(p->pagevec, 0, size);
-                        } else {
+                        p->pagevec = kcalloc(pagecount, sizeof(struct page *), GFP_NOFS);
+                        if (!p->pagevec) {
                                 mempool_free(p, nfs_wdata_mempool);
                                 p = NULL;
                         }
@@ -583,6 +579,17 @@ static int nfs_wait_on_requests(struct inode *inode, unsigned long idx_start, un
         return ret;
 }
 
+static void nfs_cancel_requests(struct list_head *head)
+{
+        struct nfs_page *req;
+        while(!list_empty(head)) {
+                req = nfs_list_entry(head->next);
+                nfs_list_remove_request(req);
+                nfs_inode_remove_request(req);
+                nfs_clear_page_writeback(req);
+        }
+}
+
 /*
  * nfs_scan_dirty - Scan an inode for dirty requests
  * @inode: NFS inode to scan
@@ -627,7 +634,7 @@ nfs_scan_commit(struct inode *inode, struct list_head *dst, unsigned long idx_st
         int res = 0;
 
         if (nfsi->ncommit != 0) {
-                res = nfs_scan_list(&nfsi->commit, dst, idx_start, npages);
+                res = nfs_scan_list(nfsi, &nfsi->commit, dst, idx_start, npages);
                 nfsi->ncommit -= res;
                 if ((nfsi->ncommit == 0) != list_empty(&nfsi->commit))
                         printk(KERN_ERR "NFS: desynchronized value of nfs_i.ncommit.\n");
@@ -1495,15 +1502,25 @@ int nfs_sync_inode_wait(struct inode *inode, unsigned long idx_start,
                 pages = nfs_scan_dirty(inode, &head, idx_start, npages);
                 if (pages != 0) {
                         spin_unlock(&nfsi->req_lock);
-                        ret = nfs_flush_list(inode, &head, pages, how);
+                        if (how & FLUSH_INVALIDATE)
+                                nfs_cancel_requests(&head);
+                        else
+                                ret = nfs_flush_list(inode, &head, pages, how);
                         spin_lock(&nfsi->req_lock);
                         continue;
                 }
                 if (nocommit)
                         break;
-                pages = nfs_scan_commit(inode, &head, 0, 0);
+                pages = nfs_scan_commit(inode, &head, idx_start, npages);
                 if (pages == 0)
                         break;
+                if (how & FLUSH_INVALIDATE) {
+                        spin_unlock(&nfsi->req_lock);
+                        nfs_cancel_requests(&head);
+                        spin_lock(&nfsi->req_lock);
+                        continue;
+                }
+                pages += nfs_scan_commit(inode, &head, 0, 0);
                 spin_unlock(&nfsi->req_lock);
                 ret = nfs_commit_list(inode, &head, how);
                 spin_lock(&nfsi->req_lock);
@@ -1512,7 +1529,7 @@ int nfs_sync_inode_wait(struct inode *inode, unsigned long idx_start,
         return ret;
 }
 
-int nfs_init_writepagecache(void)
+int __init nfs_init_writepagecache(void)
 {
         nfs_wdata_cachep = kmem_cache_create("nfs_write_data",
                                              sizeof(struct nfs_write_data),
@@ -1534,7 +1551,7 @@ int nfs_init_writepagecache(void)
         return 0;
 }
 
-void nfs_destroy_writepagecache(void)
+void __exit nfs_destroy_writepagecache(void)
 {
         mempool_destroy(nfs_commit_mempool);
         mempool_destroy(nfs_wdata_mempool);