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-rw-r--r--fs/select.c31
1 files changed, 13 insertions, 18 deletions
diff --git a/fs/select.c b/fs/select.c
index db14c781335e..2ef72d965036 100644
--- a/fs/select.c
+++ b/fs/select.c
@@ -220,8 +220,7 @@ static void __pollwait(struct file *filp, wait_queue_head_t *wait_address,
220 struct poll_table_entry *entry = poll_get_entry(pwq); 220 struct poll_table_entry *entry = poll_get_entry(pwq);
221 if (!entry) 221 if (!entry)
222 return; 222 return;
223 get_file(filp); 223 entry->filp = get_file(filp);
224 entry->filp = filp;
225 entry->wait_address = wait_address; 224 entry->wait_address = wait_address;
226 entry->key = p->_key; 225 entry->key = p->_key;
227 init_waitqueue_func_entry(&entry->wait, pollwake); 226 init_waitqueue_func_entry(&entry->wait, pollwake);
@@ -429,8 +428,6 @@ int do_select(int n, fd_set_bits *fds, struct timespec *end_time)
429 for (i = 0; i < n; ++rinp, ++routp, ++rexp) { 428 for (i = 0; i < n; ++rinp, ++routp, ++rexp) {
430 unsigned long in, out, ex, all_bits, bit = 1, mask, j; 429 unsigned long in, out, ex, all_bits, bit = 1, mask, j;
431 unsigned long res_in = 0, res_out = 0, res_ex = 0; 430 unsigned long res_in = 0, res_out = 0, res_ex = 0;
432 const struct file_operations *f_op = NULL;
433 struct file *file = NULL;
434 431
435 in = *inp++; out = *outp++; ex = *exp++; 432 in = *inp++; out = *outp++; ex = *exp++;
436 all_bits = in | out | ex; 433 all_bits = in | out | ex;
@@ -440,20 +437,21 @@ int do_select(int n, fd_set_bits *fds, struct timespec *end_time)
440 } 437 }
441 438
442 for (j = 0; j < BITS_PER_LONG; ++j, ++i, bit <<= 1) { 439 for (j = 0; j < BITS_PER_LONG; ++j, ++i, bit <<= 1) {
443 int fput_needed; 440 struct fd f;
444 if (i >= n) 441 if (i >= n)
445 break; 442 break;
446 if (!(bit & all_bits)) 443 if (!(bit & all_bits))
447 continue; 444 continue;
448 file = fget_light(i, &fput_needed); 445 f = fdget(i);
449 if (file) { 446 if (f.file) {
450 f_op = file->f_op; 447 const struct file_operations *f_op;
448 f_op = f.file->f_op;
451 mask = DEFAULT_POLLMASK; 449 mask = DEFAULT_POLLMASK;
452 if (f_op && f_op->poll) { 450 if (f_op && f_op->poll) {
453 wait_key_set(wait, in, out, bit); 451 wait_key_set(wait, in, out, bit);
454 mask = (*f_op->poll)(file, wait); 452 mask = (*f_op->poll)(f.file, wait);
455 } 453 }
456 fput_light(file, fput_needed); 454 fdput(f);
457 if ((mask & POLLIN_SET) && (in & bit)) { 455 if ((mask & POLLIN_SET) && (in & bit)) {
458 res_in |= bit; 456 res_in |= bit;
459 retval++; 457 retval++;
@@ -726,20 +724,17 @@ static inline unsigned int do_pollfd(struct pollfd *pollfd, poll_table *pwait)
726 mask = 0; 724 mask = 0;
727 fd = pollfd->fd; 725 fd = pollfd->fd;
728 if (fd >= 0) { 726 if (fd >= 0) {
729 int fput_needed; 727 struct fd f = fdget(fd);
730 struct file * file;
731
732 file = fget_light(fd, &fput_needed);
733 mask = POLLNVAL; 728 mask = POLLNVAL;
734 if (file != NULL) { 729 if (f.file) {
735 mask = DEFAULT_POLLMASK; 730 mask = DEFAULT_POLLMASK;
736 if (file->f_op && file->f_op->poll) { 731 if (f.file->f_op && f.file->f_op->poll) {
737 pwait->_key = pollfd->events|POLLERR|POLLHUP; 732 pwait->_key = pollfd->events|POLLERR|POLLHUP;
738 mask = file->f_op->poll(file, pwait); 733 mask = f.file->f_op->poll(f.file, pwait);
739 } 734 }
740 /* Mask out unneeded events. */ 735 /* Mask out unneeded events. */
741 mask &= pollfd->events | POLLERR | POLLHUP; 736 mask &= pollfd->events | POLLERR | POLLHUP;
742 fput_light(file, fput_needed); 737 fdput(f);
743 } 738 }
744 } 739 }
745 pollfd->revents = mask; 740 pollfd->revents = mask;