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select: switch select() and poll() over to hrtimers

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With lots of help, input and cleanups from Thomas Gleixner

This patch switches select() and poll() over to hrtimers.

The core of the patch is replacing the "s64 timeout" with a
"struct timespec end_time" in all the plumbing.

But most of the diffstat comes from using the just introduced helpers:
	poll_select_set_timeout
	poll_select_copy_remaining
	timespec_add_safe
which make manipulating the timespec easier and less error-prone.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Arjan van de Ven 2008-08-31 08:26:40 -07:00
parent be5dad20a5
commit 8ff3e8e85f
3 changed files with 111 additions and 294 deletions
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6
include/linux/poll.h
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@ -114,11 +114,11 @@ void zero_fd_set(unsigned long nr, unsigned long *fdset)
#define MAX_INT64_SECONDS (((s64)(~((u64)0)>>1)/HZ)-1)
extern int do_select(int n, fd_set_bits *fds, s64 *timeout);
extern int do_select(int n, fd_set_bits *fds, struct timespec *end_time);
extern int do_sys_poll(struct pollfd __user * ufds, unsigned int nfds,
s64 *timeout);
struct timespec *end_time);
extern int core_sys_select(int n, fd_set __user *inp, fd_set __user *outp,
fd_set __user *exp, s64 *timeout);
fd_set __user *exp, struct timespec *end_time);
extern int poll_select_set_timeout(struct timespec *to, long sec, long nsec);