Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6

[pandora-kernel.git] / fs / eventpoll.c

diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index a0f682c..9c677bb 100644 (file)
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -1,6 +1,6 @@
 /*
  *  fs/eventpoll.c ( Efficent event polling implementation )
- *  Copyright (C) 2001,...,2003         Davide Libenzi
+ *  Copyright (C) 2001,...,2006         Davide Libenzi
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -268,9 +268,9 @@ static int ep_poll(struct eventpoll *ep, struct epoll_event __user *events,
                   int maxevents, long timeout);
 static int eventpollfs_delete_dentry(struct dentry *dentry);
 static struct inode *ep_eventpoll_inode(void);
-static struct super_block *eventpollfs_get_sb(struct file_system_type *fs_type,
-                                             int flags, const char *dev_name,
-                                             void *data);
+static int eventpollfs_get_sb(struct file_system_type *fs_type,
+                             int flags, const char *dev_name,
+                             void *data, struct vfsmount *mnt);
 
 /*
  * This semaphore is used to serialize ep_free() and eventpoll_release_file().
@@ -281,16 +281,16 @@ static struct mutex epmutex;
 static struct poll_safewake psw;
 
 /* Slab cache used to allocate "struct epitem" */
-static kmem_cache_t *epi_cache;
+static kmem_cache_t *epi_cache __read_mostly;
 
 /* Slab cache used to allocate "struct eppoll_entry" */
-static kmem_cache_t *pwq_cache;
+static kmem_cache_t *pwq_cache __read_mostly;
 
 /* Virtual fs used to allocate inodes for eventpoll files */
-static struct vfsmount *eventpoll_mnt;
+static struct vfsmount *eventpoll_mnt __read_mostly;
 
 /* File callbacks that implement the eventpoll file behaviour */
-static struct file_operations eventpoll_fops = {
+static const struct file_operations eventpoll_fops = {
        .release        = ep_eventpoll_close,
        .poll           = ep_eventpoll_poll
 };
@@ -337,20 +337,20 @@ static inline int ep_cmp_ffd(struct epoll_filefd *p1,
 /* Special initialization for the rb-tree node to detect linkage */
 static inline void ep_rb_initnode(struct rb_node *n)
 {
-       n->rb_parent = n;
+       rb_set_parent(n, n);
 }
 
 /* Removes a node from the rb-tree and marks it for a fast is-linked check */
 static inline void ep_rb_erase(struct rb_node *n, struct rb_root *r)
 {
        rb_erase(n, r);
-       n->rb_parent = n;
+       rb_set_parent(n, n);
 }
 
 /* Fast check to verify that the item is linked to the main rb-tree */
 static inline int ep_rb_linked(struct rb_node *n)
 {
-       return n->rb_parent != n;
+       return rb_parent(n) != n;
 }
 
 /*
@@ -599,7 +599,7 @@ sys_epoll_ctl(int epfd, int op, int fd, struct epoll_event __user *event)
        switch (op) {
        case EPOLL_CTL_ADD:
                if (!epi) {
-                       epds.events |= POLLERR | POLLHUP | POLLRDHUP;
+                       epds.events |= POLLERR | POLLHUP;
 
                        error = ep_insert(ep, &epds, tfile, fd);
                } else
@@ -613,7 +613,7 @@ sys_epoll_ctl(int epfd, int op, int fd, struct epoll_event __user *event)
                break;
        case EPOLL_CTL_MOD:
                if (epi) {
-                       epds.events |= POLLERR | POLLHUP | POLLRDHUP;
+                       epds.events |= POLLERR | POLLHUP;
                        error = ep_modify(ep, epi, &epds);
                } else
                        error = -ENOENT;
@@ -1004,7 +1004,7 @@ static int ep_insert(struct eventpoll *ep, struct epoll_event *event,
 
                /* Notify waiting tasks that events are available */
                if (waitqueue_active(&ep->wq))
-                       wake_up(&ep->wq);
+                       __wake_up_locked(&ep->wq, TASK_UNINTERRUPTIBLE | TASK_INTERRUPTIBLE);
                if (waitqueue_active(&ep->poll_wait))
                        pwake++;
        }
@@ -1083,7 +1083,8 @@ static int ep_modify(struct eventpoll *ep, struct epitem *epi, struct epoll_even
 
                                /* Notify waiting tasks that events are available */
                                if (waitqueue_active(&ep->wq))
-                                       wake_up(&ep->wq);
+                                       __wake_up_locked(&ep->wq, TASK_UNINTERRUPTIBLE |
+                                                        TASK_INTERRUPTIBLE);
                                if (waitqueue_active(&ep->poll_wait))
                                        pwake++;
                        }
@@ -1260,7 +1261,8 @@ is_linked:
         * wait list.
         */
        if (waitqueue_active(&ep->wq))
-               wake_up(&ep->wq);
+               __wake_up_locked(&ep->wq, TASK_UNINTERRUPTIBLE |
+                                TASK_INTERRUPTIBLE);
        if (waitqueue_active(&ep->poll_wait))
                pwake++;
 
@@ -1444,7 +1446,8 @@ static void ep_reinject_items(struct eventpoll *ep, struct list_head *txlist)
                 * wait list.
                 */
                if (waitqueue_active(&ep->wq))
-                       wake_up(&ep->wq);
+                       __wake_up_locked(&ep->wq, TASK_UNINTERRUPTIBLE |
+                                        TASK_INTERRUPTIBLE);
                if (waitqueue_active(&ep->poll_wait))
                        pwake++;
        }
@@ -1516,7 +1519,7 @@ retry:
                 * ep_poll_callback() when events will become available.
                 */
                init_waitqueue_entry(&wait, current);
-               add_wait_queue(&ep->wq, &wait);
+               __add_wait_queue(&ep->wq, &wait);
 
                for (;;) {
                        /*
@@ -1536,7 +1539,7 @@ retry:
                        jtimeout = schedule_timeout(jtimeout);
                        write_lock_irqsave(&ep->lock, flags);
                }
-               remove_wait_queue(&ep->wq, &wait);
+               __remove_wait_queue(&ep->wq, &wait);
 
                set_current_state(TASK_RUNNING);
        }
@@ -1595,11 +1598,12 @@ eexit_1:
 }
 
 
-static struct super_block *
+static int
 eventpollfs_get_sb(struct file_system_type *fs_type, int flags,
-                  const char *dev_name, void *data)
+                  const char *dev_name, void *data, struct vfsmount *mnt)
 {
-       return get_sb_pseudo(fs_type, "eventpoll:", NULL, EVENTPOLLFS_MAGIC);
+       return get_sb_pseudo(fs_type, "eventpoll:", NULL, EVENTPOLLFS_MAGIC,
+                            mnt);
 }