• Benjamin Herrenschmidt's avatar
    [PATCH] ppc32: Tell userland about lack of standard TB · d8e998c5
    Benjamin Herrenschmidt authored
    Glibc is about to get some new high precision timer stuff that relies on
    the standard timebase of the PPC architecture.
    
    However, some (rare & old) CPUs do not have such timebase and it is a
    bit annoying to have your stuff just crash because you are running on
    the wrong CPU...
    
    This exposes to userland a CPU feature bit that tells that the current
    processor doesn't have a standard timebase.  It's negative logic so that
    glibc will still "just work" on older kernels (it will just be unhappy
    on those old CPUs but that doesn't really matter as distro tend to
    update glibc & kernel at the same time).
    Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
    d8e998c5
cputable.h 3.43 KB