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authorThomas Gleixner <tglx@linutronix.de>2008-08-31 08:16:57 -0700
committerArjan van de Ven <arjan@linux.intel.com>2008-09-05 21:34:59 -0700
commitb773ad40aca5bd755ba886620842f16e8fef6d75 (patch)
tree7065661f6559aff70244f2805ced48f894c9b38c /include/linux/poll.h
parentdf0cc0539b4127bd02f64de2c335b4af1fdb3845 (diff)
downloadop-kernel-dev-b773ad40aca5bd755ba886620842f16e8fef6d75.zip
op-kernel-dev-b773ad40aca5bd755ba886620842f16e8fef6d75.tar.gz
select: add poll_select_set_timeout() and poll_select_copy_remaining() helpers
This patch adds 2 helpers that will be used for the hrtimer based select/poll: poll_select_set_timeout() is a helper that takes a timeout (as a second, nanosecond pair) and turns that into a "struct timespec" that represents the absolute end time. This is a common operation in the many select() and poll() variants and needs various, common, sanity checks. poll_select_copy_remaining() is a helper that takes care of copying the remaining time to userspace, as select(), pselect() and ppoll() do. This function comes in both a natural and a compat implementation (due to datastructure differences). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Diffstat (limited to 'include/linux/poll.h')
-rw-r--r--include/linux/poll.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/poll.h b/include/linux/poll.h
index ef45382..f65de51 100644
--- a/include/linux/poll.h
+++ b/include/linux/poll.h
@@ -120,6 +120,8 @@ extern int do_sys_poll(struct pollfd __user * ufds, unsigned int nfds,
extern int core_sys_select(int n, fd_set __user *inp, fd_set __user *outp,
fd_set __user *exp, s64 *timeout);
+extern int poll_select_set_timeout(struct timespec *to, long sec, long nsec);
+
#endif /* KERNEL */
#endif /* _LINUX_POLL_H */
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