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    Subject[tip:sched/core] sched/wait: Change the wait_exclusive control flow
    Commit-ID:  bb632bc44970f75b66df102e831a4fc0692e9159
    Gitweb: http://git.kernel.org/tip/bb632bc44970f75b66df102e831a4fc0692e9159
    Author: Peter Zijlstra <peterz@infradead.org>
    AuthorDate: Wed, 2 Oct 2013 11:22:20 +0200
    Committer: Ingo Molnar <mingo@kernel.org>
    CommitDate: Fri, 4 Oct 2013 10:14:45 +0200

    sched/wait: Change the wait_exclusive control flow

    Purely a preparatory patch; it changes the control flow to match what
    will soon be generated by generic code so that that patch can be a
    unity transform.

    Reviewed-by: Oleg Nesterov <oleg@redhat.com>
    Signed-off-by: Peter Zijlstra <peterz@infradead.org>
    Link: http://lkml.kernel.org/r/20131002092528.107994763@infradead.org
    Signed-off-by: Ingo Molnar <mingo@kernel.org>
    ---
    include/linux/wait.h | 9 +++++----
    1 file changed, 5 insertions(+), 4 deletions(-)

    diff --git a/include/linux/wait.h b/include/linux/wait.h
    index b2afd66..7d7819d 100644
    --- a/include/linux/wait.h
    +++ b/include/linux/wait.h
    @@ -428,23 +428,24 @@ do { \

    #define __wait_event_interruptible_exclusive(wq, condition, ret) \
    do { \
    + __label__ __out; \
    DEFINE_WAIT(__wait); \
    \
    for (;;) { \
    prepare_to_wait_exclusive(&wq, &__wait, \
    TASK_INTERRUPTIBLE); \
    - if (condition) { \
    - finish_wait(&wq, &__wait); \
    + if (condition) \
    break; \
    - } \
    if (signal_pending(current)) { \
    ret = -ERESTARTSYS; \
    abort_exclusive_wait(&wq, &__wait, \
    TASK_INTERRUPTIBLE, NULL); \
    - break; \
    + goto __out; \
    } \
    schedule(); \
    } \
    + finish_wait(&wq, &__wait); \
    +__out: ; \
    } while (0)

    #define wait_event_interruptible_exclusive(wq, condition) \

    \
     
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