lkml.org 
[lkml]   [2007]   [Aug]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH 0/24] make atomic_read() behave consistently across all architectures
    Herbert Xu writes:

    > Can you find an actual atomic_read code snippet there that is
    > broken without the volatile modifier?

    There are some in arch-specific code, for example line 1073 of
    arch/mips/kernel/smtc.c. On mips, cpu_relax() is just barrier(), so
    the empty loop body is ok provided that atomic_read actually does the
    load each time around the loop.

    Paul.
    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2007-08-17 07:27    [W:0.020 / U:0.184 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site