[PATCH 0/6] sched, wait: Collapse __wait_event macros -v4

[Peter Zijlstra <peterz@infradead.org>]

While poking at the cpu hotplug implementation I had a desire to use
wait_event() with schedule_preempt_disabled() and found the rediculous
amount of duplication in linux/wait.h.

These patches attempt to cure some of this while also making it
'trivial' to generate new variants.

Compile and boot tested on x86_64.

Changes since -v3:
 - added LKML to the CC (D'0h!!)
 - introduced ___wait_cond_timeout() to avoid double evalutation of 'condition'

Changes since -v2:
 - removed ___wait_cmd_lock_irq(), ___wait_cmd_lock_irq_timo()
 - renamed ___wait_cmd_test_timeout() to ___wait_test_timeout()
 - renamed ___wait_cmd_schedule_timeout() to ___wait_sched_timeout()
 - fixed schedule_timeout() invocations in patch 6; don't restart a
   schedule_timeout() at the total timeout; rather continue where we
   left off for a total fixed timeout.
 - use 'long' return type for ___wait_event() so that timeout values
   for schedule_timeout() fit.
 - fix wait_event_interruptible_lock_irq_timeout() and use long return type.


---
 arch/mips/kernel/rtlx.c         |   19 +-
 include/linux/tty.h             |   28 +---
 include/linux/wait.h            |  268 +++++++++++++---------------------------
 net/irda/af_irda.c              |    5 
 net/netfilter/ipvs/ip_vs_sync.c |    7 -
 5 files changed, 108 insertions(+), 219 deletions(-)