1 files changed, 7 insertions, 93 deletions

diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 3610e9958b4c..9a5e4f5f3122 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -50,7 +50,7 @@
 #define CIFS_MAGIC_NUMBER 0xFF534D42    /* the first four bytes of SMB PDUs */
 
 #ifdef CONFIG_CIFS_QUOTA
-static struct quotactl_ops cifs_quotactl_ops;
+static const struct quotactl_ops cifs_quotactl_ops;
 #endif /* QUOTA */
 
 int cifsFYI = 0;
@@ -64,9 +64,6 @@ unsigned int multiuser_mount = 0;
 unsigned int extended_security = CIFSSEC_DEF;
 /* unsigned int ntlmv2_support = 0; */
 unsigned int sign_CIFS_PDUs = 1;
-extern struct task_struct *oplockThread; /* remove sparse warning */
-struct task_struct *oplockThread = NULL;
-/* extern struct task_struct * dnotifyThread; remove sparse warning */
 static const struct super_operations cifs_super_ops;
 unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE;
 module_param(CIFSMaxBufSize, int, 0);
@@ -185,8 +182,7 @@ out_mount_failed:
                         cifs_sb->mountdata = NULL;
                 }
 #endif
-                if (cifs_sb->local_nls)
-                        unload_nls(cifs_sb->local_nls);
+                unload_nls(cifs_sb->local_nls);
                 kfree(cifs_sb);
         }
         return rc;
@@ -517,7 +513,7 @@ int cifs_xstate_get(struct super_block *sb, struct fs_quota_stat *qstats)
         return rc;
 }
 
-static struct quotactl_ops cifs_quotactl_ops = {
+static const struct quotactl_ops cifs_quotactl_ops = {
         .set_xquota     = cifs_xquota_set,
         .get_xquota     = cifs_xquota_get,
         .set_xstate     = cifs_xstate_set,
@@ -973,89 +969,12 @@ cifs_destroy_mids(void)
         kmem_cache_destroy(cifs_oplock_cachep);
 }
 
-static int cifs_oplock_thread(void *dummyarg)
-{
-        struct oplock_q_entry *oplock_item;
-        struct cifsTconInfo *pTcon;
-        struct inode *inode;
-        __u16  netfid;
-        int rc, waitrc = 0;
-
-        set_freezable();
-        do {
-                if (try_to_freeze())
-                        continue;
-
-                spin_lock(&cifs_oplock_lock);
-                if (list_empty(&cifs_oplock_list)) {
-                        spin_unlock(&cifs_oplock_lock);
-                        set_current_state(TASK_INTERRUPTIBLE);
-                        schedule_timeout(39*HZ);
-                } else {
-                        oplock_item = list_entry(cifs_oplock_list.next,
-                                                struct oplock_q_entry, qhead);
-                        cFYI(1, ("found oplock item to write out"));
-                        pTcon = oplock_item->tcon;
-                        inode = oplock_item->pinode;
-                        netfid = oplock_item->netfid;
-                        spin_unlock(&cifs_oplock_lock);
-                        DeleteOplockQEntry(oplock_item);
-                        /* can not grab inode sem here since it would
-                                deadlock when oplock received on delete
-                                since vfs_unlink holds the i_mutex across
-                                the call */
-                        /* mutex_lock(&inode->i_mutex);*/
-                        if (S_ISREG(inode->i_mode)) {
-#ifdef CONFIG_CIFS_EXPERIMENTAL
-                                if (CIFS_I(inode)->clientCanCacheAll == 0)
-                                        break_lease(inode, FMODE_READ);
-                                else if (CIFS_I(inode)->clientCanCacheRead == 0)
-                                        break_lease(inode, FMODE_WRITE);
-#endif
-                                rc = filemap_fdatawrite(inode->i_mapping);
-                                if (CIFS_I(inode)->clientCanCacheRead == 0) {
-                                        waitrc = filemap_fdatawait(
-                                                              inode->i_mapping);
-                                        invalidate_remote_inode(inode);
-                                }
-                                if (rc == 0)
-                                        rc = waitrc;
-                        } else
-                                rc = 0;
-                        /* mutex_unlock(&inode->i_mutex);*/
-                        if (rc)
-                                CIFS_I(inode)->write_behind_rc = rc;
-                        cFYI(1, ("Oplock flush inode %p rc %d",
-                                inode, rc));
-
-                                /* releasing stale oplock after recent reconnect
-                                of smb session using a now incorrect file
-                                handle is not a data integrity issue but do
-                                not bother sending an oplock release if session
-                                to server still is disconnected since oplock
-                                already released by the server in that case */
-                        if (!pTcon->need_reconnect) {
-                                rc = CIFSSMBLock(0, pTcon, netfid,
-                                                0 /* len */ , 0 /* offset */, 0,
-                                                0, LOCKING_ANDX_OPLOCK_RELEASE,
-                                                false /* wait flag */);
-                                cFYI(1, ("Oplock release rc = %d", rc));
-                        }
-                        set_current_state(TASK_INTERRUPTIBLE);
-                        schedule_timeout(1);  /* yield in case q were corrupt */
-                }
-        } while (!kthread_should_stop());
-
-        return 0;
-}
-
 static int __init
 init_cifs(void)
 {
         int rc = 0;
         cifs_proc_init();
         INIT_LIST_HEAD(&cifs_tcp_ses_list);
-        INIT_LIST_HEAD(&cifs_oplock_list);
 #ifdef CONFIG_CIFS_EXPERIMENTAL
         INIT_LIST_HEAD(&GlobalDnotifyReqList);
         INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
@@ -1084,7 +1003,6 @@ init_cifs(void)
         rwlock_init(&GlobalSMBSeslock);
         rwlock_init(&cifs_tcp_ses_lock);
         spin_lock_init(&GlobalMid_Lock);
-        spin_lock_init(&cifs_oplock_lock);
 
         if (cifs_max_pending < 2) {
                 cifs_max_pending = 2;
@@ -1119,16 +1037,13 @@ init_cifs(void)
         if (rc)
                 goto out_unregister_key_type;
 #endif
-        oplockThread = kthread_run(cifs_oplock_thread, NULL, "cifsoplockd");
-        if (IS_ERR(oplockThread)) {
-                rc = PTR_ERR(oplockThread);
-                cERROR(1, ("error %d create oplock thread", rc));
-                goto out_unregister_dfs_key_type;
-        }
+        rc = slow_work_register_user();
+        if (rc)
+                goto out_unregister_resolver_key;
 
         return 0;
 
- out_unregister_dfs_key_type:
+ out_unregister_resolver_key:
 #ifdef CONFIG_CIFS_DFS_UPCALL
         unregister_key_type(&key_type_dns_resolver);
  out_unregister_key_type:
@@ -1165,7 +1080,6 @@ exit_cifs(void)
         cifs_destroy_inodecache();
         cifs_destroy_mids();
         cifs_destroy_request_bufs();
-        kthread_stop(oplockThread);
 }
 
 MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");