diff options
| author | Oleg Nesterov <oleg@tv-sign.ru> | 2007-10-16 23:26:18 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-17 08:42:48 -0700 |
| commit | 9bf084f70ffde6521d113593b89461a5bd2a303b (patch) | |
| tree | ea62a8c9c54d0f702e73e9fa6e6c8699106ab892 /fs/select.c | |
| parent | 252e5725cfb55a89e54888317856903fef9d5031 (diff) | |
| download | lwn-9bf084f70ffde6521d113593b89461a5bd2a303b.tar.gz lwn-9bf084f70ffde6521d113593b89461a5bd2a303b.zip | |
do_poll: return -EINTR when signalled
do_poll() checks signal_pending() but returns 0 when interrupted. This means
the caller has to check signal_pending() again.
Change it to return -EINTR when signal_pending() and count == 0.
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Andi Kleen <ak@suse.de>
Cc: Davide Libenzi <davidel@xmailserver.org>
Cc: Vadim Lobanov <vlobanov@speakeasy.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/select.c')
| -rw-r--r-- | fs/select.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/fs/select.c b/fs/select.c index 41c3571e64ed..e2fd58f8f1db 100644 --- a/fs/select.c +++ b/fs/select.c @@ -586,7 +586,7 @@ static int do_poll(unsigned int nfds, struct poll_list *list, /* Optimise the no-wait case */ if (!(*timeout)) pt = NULL; - + for (;;) { struct poll_list *walk; long __timeout; @@ -616,10 +616,12 @@ static int do_poll(unsigned int nfds, struct poll_list *list, * a poll_table to them on the next loop iteration. */ pt = NULL; - if (count || !*timeout || signal_pending(current)) - break; - count = wait->error; - if (count) + if (!count) { + count = wait->error; + if (signal_pending(current)) + count = -EINTR; + } + if (count || !*timeout) break; if (*timeout < 0) { @@ -689,8 +691,6 @@ int do_sys_poll(struct pollfd __user *ufds, unsigned int nfds, s64 *timeout) poll_initwait(&table); fdcount = do_poll(nfds, head, &table, timeout); - if (!fdcount && signal_pending(current)) - fdcount = -EINTR; poll_freewait(&table); for (walk = head; walk; walk = walk->next) { |