1. 30 11月, 2012 1 次提交
    • L
      wait: add wait_event_lock_irq() interface · eed8c02e
      Lukas Czerner 提交于
      New wait_event{_interruptible}_lock_irq{_cmd} macros added. This commit
      moves the private wait_event_lock_irq() macro from MD to regular wait
      includes, introduces new macro wait_event_lock_irq_cmd() instead of using
      the old method with omitting cmd parameter which is ugly and makes a use
      of new macros in the MD. It also introduces the _interruptible_ variant.
      
      The use of new interface is when one have a special lock to protect data
      structures used in the condition, or one also needs to invoke "cmd"
      before putting it to sleep.
      
      All new macros are expected to be called with the lock taken. The lock
      is released before sleep and is reacquired afterwards. We will leave the
      macro with the lock held.
      
      Note to DM: IMO this should also fix theoretical race on waitqueue while
      using simultaneously wait_event_lock_irq() and wait_event() because of
      lack of locking around current state setting and wait queue removal.
      Signed-off-by: NLukas Czerner <lczerner@redhat.com>
      Cc: Neil Brown <neilb@suse.de>
      Cc: David Howells <dhowells@redhat.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Signed-off-by: NJens Axboe <axboe@kernel.dk>
      eed8c02e
  2. 23 11月, 2012 5 次提交
  3. 13 11月, 2012 1 次提交
  4. 09 11月, 2012 33 次提交