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    SubjectRe: [PATCH v4 0/5] x86: Cleanup and simplify cpu-specific data
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    On 28 February 2012 04:31, H. Peter Anvin <hpa@zytor.com> wrote:
    > Better yet, fix the problem...
    >

    It appears that some attempts have been made at fixing this problem already:

    https://lkml.org/lkml/2011/7/6/6
    https://lkml.org/lkml/2011/7/7/480

    So perhaps I can just turn off that config setting for now. I'm going
    away for a few days, but I'll try to fix up the patch series next
    week.


    > Ingo Molnar <mingo@elte.hu> wrote:
    >
    >>
    >>* H. Peter Anvin <hpa@zytor.com> wrote:
    >>
    >>> >In function ‘copy_from_user’,
    >>> >     inlined from ‘pktgen_if_write’ at net/core/pktgen.c:877:20:
    >>>
    >>>/home/kevin/linux/linux-2.6/arch/x86/include/asm/uaccess_32.h:211:26:
    >>> >error: call to ‘copy_from_user_overflow’ declared with attribute
    >>> >error: copy_from_user() buffer size is not provably correct
    >>> >make[2]: *** [net/core/pktgen.o] Error 1
    >>> >
    >>> >On:
    >>> >
    >>> >gcc (GCC) 4.6.2 20120120 (prerelease)
    >>> >
    >>> >Is that my fault, or something else?
    >>> >
    >>> >Kevin
    >>> >
    >>>
    >>> That comes from compiling with warnings as errors.  Not that someone
    >>> shouldn't look at that kind of problem.
    >>
    >>Can probably be worked around by disabling:
    >>
    >>CONFIG_DEBUG_STRICT_USER_COPY_CHECKS
    >>
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