From b5e618181a927210f8be1d3d2249d31904ba358d Mon Sep 17 00:00:00 2001 From: Pavel Emelianov Date: Tue, 8 May 2007 00:30:19 -0700 Subject: Introduce a handy list_first_entry macro There are many places in the kernel where the construction like foo = list_entry(head->next, struct foo_struct, list); are used. The code might look more descriptive and neat if using the macro list_first_entry(head, type, member) \ list_entry((head)->next, type, member) Here is the macro itself and the examples of its usage in the generic code. If it will turn out to be useful, I can prepare the set of patches to inject in into arch-specific code, drivers, networking, etc. Signed-off-by: Pavel Emelianov Signed-off-by: Kirill Korotaev Cc: Randy Dunlap Cc: Andi Kleen Cc: Zach Brown Cc: Davide Libenzi Cc: John McCutchan Cc: Thomas Gleixner Cc: Ingo Molnar Cc: john stultz Cc: Ram Pai Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/eventpoll.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'fs/eventpoll.c') diff --git a/fs/eventpoll.c b/fs/eventpoll.c index d0b86060cc1..b5c7ca58493 100644 --- a/fs/eventpoll.c +++ b/fs/eventpoll.c @@ -453,7 +453,7 @@ void eventpoll_release_file(struct file *file) mutex_lock(&epmutex); while (!list_empty(lsthead)) { - epi = list_entry(lsthead->next, struct epitem, fllink); + epi = list_first_entry(lsthead, struct epitem, fllink); ep = epi->ep; list_del_init(&epi->fllink); @@ -1143,7 +1143,7 @@ static void ep_unregister_pollwait(struct eventpoll *ep, struct epitem *epi) if (nwait) { while (!list_empty(lsthead)) { - pwq = list_entry(lsthead->next, struct eppoll_entry, llink); + pwq = list_first_entry(lsthead, struct eppoll_entry, llink); list_del_init(&pwq->llink); remove_wait_queue(pwq->whead, &pwq->wait); @@ -1359,7 +1359,7 @@ static int ep_send_events(struct eventpoll *ep, struct list_head *txlist, * read. */ for (eventcnt = 0; !list_empty(txlist) && eventcnt < maxevents;) { - epi = list_entry(txlist->next, struct epitem, rdllink); + epi = list_first_entry(txlist, struct epitem, rdllink); prefetch(epi->rdllink.next); /* -- cgit v1.2.3