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    SubjectRe: [PATCH 2/2] jump label: disable due to compiler bug
    On 10/29/2010 10:33 AM, Steven Rostedt wrote:
    > On Fri, 2010-10-29 at 10:18 -0700, David Daney wrote:
    >
    >> I hate to continue beating a dead horse, but RTH just committed the GCC
    >> patch, and it will be part of GCC-4.5.2 and later.
    >
    > Great!
    >
    >>
    >> Should this knowledge be builtin to the jump label enabling calculus?
    >
    > No, because we can't trust versions. We never know what home grown gcc a
    > kernel developer is using (and what has been backported or not). Thus
    > the only option is to have a builtin test we can do at compile time to
    > determine if the bug exists or not and decide then.
    >

    The test case is in the GCC bug report, and is quite small:

    http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46226

    Perhaps it could be integrated with the current checks for the presence
    of 'asm goto'

    > Note, I'm currently running my last set of patches through ktest. When
    > it finishes (presumably with no issues), I'll post a pull request.
    >
    > -- Steve
    >
    >



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