lkml.org 
[lkml]   [2010]   [Jun]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    SubjectRe: [RFC][PATCH] irq_work -v2
    From
    Date
    On Fri, 2010-06-25 at 21:30 +0200, Andi Kleen wrote:
    > > + entry->next = next_flags(NULL, IRQ_WORK_BUSY);
    > > + entry->func(entry);
    >
    > Needs compiler memory barrier here I think.
    >
    > > + /*
    > > + * Clear the BUSY bit and return to the free state if
    > > + * no-one else claimed it meanwhile.
    > > + */
    > > + cmpxchg(&entry->next, next_flags(NULL, IRQ_WORK_BUSY), NULL);
    > > + }

    Both the (indirect) function call and the cmpxchg imply a compiler
    barrier.


    \
     
     \ /
      Last update: 2010-06-25 21:49    [W:0.020 / U:90.960 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site