diff options
| author | Al Viro | 2020-08-31 13:16:39 -0400 |
|---|---|---|
| committer | Al Viro | 2020-10-25 20:01:58 -0400 |
| commit | 1ec09974d845bdf827028aa7deb96378f54bcd06 (patch) | |
| tree | 02bbed249a6ef721a4abeb8856d1730cacb22b27 /fs/eventpoll.c | |
| parent | db502f8a3b0bb5188f92d9d6a68aed223892689b (diff) | |
lift the calls of ep_read_events_proc() into the callers
Expand the calls of ep_scan_ready_list() that get ep_read_events_proc().
As a side benefit we can pass depth to ep_read_events_proc() by value
and not by address - the latter used to be forced by the signature
expected from ep_scan_ready_list() callback.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/eventpoll.c')
| -rw-r--r-- | fs/eventpoll.c | 24 |
1 files changed, 14 insertions, 10 deletions
diff --git a/fs/eventpoll.c b/fs/eventpoll.c index eb012fdc152e..9b9e29e0c85f 100644 --- a/fs/eventpoll.c +++ b/fs/eventpoll.c @@ -774,7 +774,7 @@ static int ep_eventpoll_release(struct inode *inode, struct file *file) } static __poll_t ep_read_events_proc(struct eventpoll *ep, struct list_head *head, - void *priv); + int depth); static void ep_ptable_queue_proc(struct file *file, wait_queue_head_t *whead, poll_table *pt); @@ -787,6 +787,8 @@ static __poll_t ep_item_poll(const struct epitem *epi, poll_table *pt, int depth) { struct eventpoll *ep; + LIST_HEAD(txlist); + __poll_t res; bool locked; pt->_key = epi->event.events; @@ -797,20 +799,19 @@ static __poll_t ep_item_poll(const struct epitem *epi, poll_table *pt, poll_wait(epi->ffd.file, &ep->poll_wait, pt); locked = pt && (pt->_qproc == ep_ptable_queue_proc); - return ep_scan_ready_list(epi->ffd.file->private_data, - ep_read_events_proc, &depth, depth, - locked) & epi->event.events; + ep_start_scan(ep, depth, locked, &txlist); + res = ep_read_events_proc(ep, &txlist, depth + 1); + ep_done_scan(ep, depth, locked, &txlist); + return res & epi->event.events; } static __poll_t ep_read_events_proc(struct eventpoll *ep, struct list_head *head, - void *priv) + int depth) { struct epitem *epi, *tmp; poll_table pt; - int depth = *(int *)priv; init_poll_funcptr(&pt, NULL); - depth++; list_for_each_entry_safe(epi, tmp, head, rdllink) { if (ep_item_poll(epi, &pt, depth)) { @@ -832,7 +833,8 @@ static __poll_t ep_read_events_proc(struct eventpoll *ep, struct list_head *head static __poll_t ep_eventpoll_poll(struct file *file, poll_table *wait) { struct eventpoll *ep = file->private_data; - int depth = 0; + LIST_HEAD(txlist); + __poll_t res; /* Insert inside our poll wait queue */ poll_wait(file, &ep->poll_wait, wait); @@ -841,8 +843,10 @@ static __poll_t ep_eventpoll_poll(struct file *file, poll_table *wait) * Proceed to find out if wanted events are really available inside * the ready list. */ - return ep_scan_ready_list(ep, ep_read_events_proc, - &depth, depth, false); + ep_start_scan(ep, 0, false, &txlist); + res = ep_read_events_proc(ep, &txlist, 1); + ep_done_scan(ep, 0, false, &txlist); + return res; } #ifdef CONFIG_PROC_FS |