+/**
+ * nfs_revalidate_mapping - Revalidate the pagecache
+ * @inode - pointer to host inode
+ * @mapping - pointer to mapping
+ */
+void nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
+{
+ struct nfs_inode *nfsi = NFS_I(inode);
+
+ if (nfsi->cache_validity & NFS_INO_INVALID_DATA) {
+ if (S_ISREG(inode->i_mode)) {
+ if (filemap_fdatawrite(mapping) == 0)
+ filemap_fdatawait(mapping);
+ nfs_wb_all(inode);
+ }
+ invalidate_inode_pages2(mapping);
+
+ spin_lock(&inode->i_lock);
+ nfsi->cache_validity &= ~NFS_INO_INVALID_DATA;
+ if (S_ISDIR(inode->i_mode)) {
+ memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
+ /* This ensures we revalidate child dentries */
+ nfsi->cache_change_attribute++;
+ }
+ spin_unlock(&inode->i_lock);
+
+ dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n",
+ inode->i_sb->s_id,
+ (long long)NFS_FILEID(inode));
+ }
+}
+