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    Subject[PATCH-RT] preempt.h: Fix implicit declaration of 'preempt_check_resched_rt'
    Date
    When building a non-preempt kernel where CONFIG_PREEMPT_COUNT is not
    defined the following build break occurs.

    /home/jkacur/linux-rt/block/blk-softirq.c: In function ‘trigger_softirq’:
    /home/jkacur/linux-rt/block/blk-softirq.c:54: error: implicit declaration of function ‘preempt_check_resched_rt’
    make[2]: *** [block/blk-softirq.o] Error 1
    make[1]: *** [block/blk-softirq.o] Error 2
    make: *** [sub-make] Error 2

    This patch fixes the build error by adding a define to the
    !CONFIG_PREEMPT_COUNT section.

    Signed-off-by: Clark Williams <williams@redhat.com>
    Signed-off-by: John Kacur <jkacur@redhat.com>
    ---
    include/linux/preempt.h | 1 +
    1 files changed, 1 insertions(+), 0 deletions(-)

    diff --git a/include/linux/preempt.h b/include/linux/preempt.h
    index fa40695..58d8982 100644
    --- a/include/linux/preempt.h
    +++ b/include/linux/preempt.h
    @@ -107,6 +107,7 @@ do { \
    #define preempt_disable_notrace() do { } while (0)
    #define preempt_enable_no_resched_notrace() do { } while (0)
    #define preempt_enable_notrace() do { } while (0)
    +#define preempt_check_resched_rt() do { } while (0)

    #endif /* CONFIG_PREEMPT_COUNT */

    --
    1.7.2.3
    --
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