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    SubjectRe: Userspace visible of 3 include/asm/ headers
    On Fri, Aug 04, 2006 at 12:14:02AM +0400, Alexey Dobriyan wrote:
    > On Thu, Aug 03, 2006 at 03:44:10PM -0400, Dave Jones wrote:
    > > On Thu, Aug 03, 2006 at 09:39:52PM +0200, Adrian Bunk wrote:
    > > > Could anyone help me regarding the desired userspace visibility of the
    > > > following three headers under include/asm/?
    > > >
    > > > Header : cpufeature.h
    > > > Architectures : i386, x86_64
    > > > Is there any reason why this header is exported to userspace?
    > >
    > > Probably not. The only apps I've seen that care about feature bits
    > > define them theirselves rather than use these.
    >
    > Feature bits are only (indirectly) visible via /proc/cpuinfo.
    > struct cpuinfo_x86, AFAICS, is never copied to userspace. So, it's safe
    > to remove this header.

    Most of the bits (all but the linux specific ones), are the same bits you
    can get from /dev/cpu/0/cpuid, or from calling the cpuid instruction by hand.

    Dave

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