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    SubjectRe: 2.6.23-rc3-mm1
    On Wed, 22 Aug 2007 11:03:48 -0700
    Randy Dunlap <randy.dunlap@oracle.com> wrote:

    > On Wed, 22 Aug 2007 02:06:48 -0700 Andrew Morton wrote:
    >
    > >
    > > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.23-rc3/2.6.23-rc3-mm1/
    >
    > allyesconfig on x86_64 says:
    >
    > kernel/unwind.c:1016:31: error: undefined identifier '__builtin_labs'
    > kernel/unwind.c:1232:25: error: undefined identifier '__builtin_labs'
    >

    One wonders why x86_64-mm-unwinder.patch has an open-coded call to
    __builtin_labs(), when include/linux/kernel.h:abs() should do a fine job.

    And what's this stuff, anyway?

    +typedef unsigned long uleb128_t;
    +typedef signed long sleb128_t;
    +#define sleb128abs __builtin_labs

    unsigned and signed little-endian 128-bit types? Nope, they're 32-bit or
    64-bit. All very mysterious.
    -
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