Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfashe...

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

diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 34f68f3..990c01d 100644 (file)
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -257,25 +257,6 @@ static inline int ep_cmp_ffd(struct epoll_filefd *p1,
                (p1->file < p2->file ? -1 : p1->fd - p2->fd));
 }
 
-/* Special initialization for the RB tree node to detect linkage */
-static inline void ep_rb_initnode(struct rb_node *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);
-       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 rb_parent(n) != n;
-}
-
 /* Tells us if the item is currently linked */
 static inline int ep_is_linked(struct list_head *p)
 {
@@ -283,13 +264,13 @@ static inline int ep_is_linked(struct list_head *p)
 }
 
 /* Get the "struct epitem" from a wait queue pointer */
-static inline struct epitem * ep_item_from_wait(wait_queue_t *p)
+static inline struct epitem *ep_item_from_wait(wait_queue_t *p)
 {
        return container_of(p, struct eppoll_entry, wait)->base;
 }
 
 /* Get the "struct epitem" from an epoll queue wrapper */
-static inline struct epitem * ep_item_from_epqueue(poll_table *p)
+static inline struct epitem *ep_item_from_epqueue(poll_table *p)
 {
        return container_of(p, struct ep_pqueue, pt)->epi;
 }
@@ -353,7 +334,7 @@ static void ep_poll_safewake(struct poll_safewake *psw, wait_queue_head_t *wq)
        spin_unlock_irqrestore(&psw->lock, flags);
 
        /* Do really wake up now */
-       wake_up(wq);
+       wake_up_nested(wq, 1 + wake_nests);
 
        /* Remove the current task from the list */
        spin_lock_irqsave(&psw->lock, flags);
@@ -411,8 +392,7 @@ static int ep_remove(struct eventpoll *ep, struct epitem *epi)
                list_del_init(&epi->fllink);
        spin_unlock(&file->f_ep_lock);
 
-       if (ep_rb_linked(&epi->rbn))
-               ep_rb_erase(&epi->rbn, &ep->rbr);
+       rb_erase(&epi->rbn, &ep->rbr);
 
        spin_lock_irqsave(&ep->lock, flags);
        if (ep_is_linked(&epi->rdllink))
@@ -656,8 +636,7 @@ is_linked:
         * wait list.
         */
        if (waitqueue_active(&ep->wq))
-               __wake_up_locked(&ep->wq, TASK_UNINTERRUPTIBLE |
-                                TASK_INTERRUPTIBLE);
+               wake_up_locked(&ep->wq);
        if (waitqueue_active(&ep->poll_wait))
                pwake++;
 
@@ -729,7 +708,6 @@ static int ep_insert(struct eventpoll *ep, struct epoll_event *event,
                goto error_return;
 
        /* Item initialization follow here ... */
-       ep_rb_initnode(&epi->rbn);
        INIT_LIST_HEAD(&epi->rdllink);
        INIT_LIST_HEAD(&epi->fllink);
        INIT_LIST_HEAD(&epi->pwqlist);
@@ -780,7 +758,7 @@ 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_locked(&ep->wq, TASK_UNINTERRUPTIBLE | TASK_INTERRUPTIBLE);
+                       wake_up_locked(&ep->wq);
                if (waitqueue_active(&ep->poll_wait))
                        pwake++;
        }
@@ -854,8 +832,7 @@ 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_locked(&ep->wq, TASK_UNINTERRUPTIBLE |
-                                                TASK_INTERRUPTIBLE);
+                               wake_up_locked(&ep->wq);
                        if (waitqueue_active(&ep->poll_wait))
                                pwake++;
                }
@@ -978,8 +955,7 @@ errxit:
                 * wait list (delayed after we release the lock).
                 */
                if (waitqueue_active(&ep->wq))
-                       __wake_up_locked(&ep->wq, TASK_UNINTERRUPTIBLE |
-                                        TASK_INTERRUPTIBLE);
+                       wake_up_locked(&ep->wq);
                if (waitqueue_active(&ep->poll_wait))
                        pwake++;
        }
@@ -1074,8 +1050,6 @@ asmlinkage long sys_epoll_create(int size)
 {
        int error, fd = -1;
        struct eventpoll *ep;
-       struct inode *inode;
-       struct file *file;
 
        DNPRINTK(3, (KERN_INFO "[%p] eventpoll: sys_epoll_create(%d)\n",
                     current, size));
@@ -1085,29 +1059,24 @@ asmlinkage long sys_epoll_create(int size)
         * structure ( "struct eventpoll" ).
         */
        error = -EINVAL;
-       if (size <= 0 || (error = ep_alloc(&ep)) != 0)
+       if (size <= 0 || (error = ep_alloc(&ep)) < 0) {
+               fd = error;
                goto error_return;
+       }
 
        /*
         * Creates all the items needed to setup an eventpoll file. That is,
-        * a file structure, and inode and a free file descriptor.
+        * a file structure and a free file descriptor.
         */
-       error = anon_inode_getfd(&fd, &inode, &file, "[eventpoll]",
-                                &eventpoll_fops, ep);
-       if (error)
-               goto error_free;
+       fd = anon_inode_getfd("[eventpoll]", &eventpoll_fops, ep);
+       if (fd < 0)
+               ep_free(ep);
 
+error_return:
        DNPRINTK(3, (KERN_INFO "[%p] eventpoll: sys_epoll_create(%d) = %d\n",
                     current, size, fd));
 
        return fd;
-
-error_free:
-       ep_free(ep);
-error_return:
-       DNPRINTK(3, (KERN_INFO "[%p] eventpoll: sys_epoll_create(%d) = %d\n",
-                    current, size, error));
-       return error;
 }
 
 /*
@@ -1265,7 +1234,7 @@ error_return:
        return error;
 }
 
-#ifdef TIF_RESTORE_SIGMASK
+#ifdef HAVE_SET_RESTORE_SIGMASK
 
 /*
  * Implement the event wait interface for the eventpoll file. It is the kernel
@@ -1303,7 +1272,7 @@ asmlinkage long sys_epoll_pwait(int epfd, struct epoll_event __user *events,
                if (error == -EINTR) {
                        memcpy(&current->saved_sigmask, &sigsaved,
                               sizeof(sigsaved));
-                       set_thread_flag(TIF_RESTORE_SIGMASK);
+                       set_restore_sigmask();
                } else
                        sigprocmask(SIG_SETMASK, &sigsaved, NULL);
        }
@@ -1311,7 +1280,7 @@ asmlinkage long sys_epoll_pwait(int epfd, struct epoll_event __user *events,
        return error;
 }
 
-#endif /* #ifdef TIF_RESTORE_SIGMASK */
+#endif /* HAVE_SET_RESTORE_SIGMASK */
 
 static int __init eventpoll_init(void)
 {
@@ -1333,4 +1302,3 @@ static int __init eventpoll_init(void)
        return 0;
 }
 fs_initcall(eventpoll_init);
-