• Arnd Bergmann's avatar
    asm-generic: add a generic unistd.h · e64a1617
    Arnd Bergmann authored
    A new architecture should only define a minimal set of system
    calls while still providing the full functionality. This version
    of unistd.h has gone through intensive review to make sure that
    by default it only enables syscalls that do not already have
    a more featureful replacement.
    
    It is modeled after the x86-64 version of unistd.h, which unifies
    the syscall number definition and the actual system call table
    in a single file, in order to keep them synchronized much more
    easily.
    
    This first version still keeps legacy system call definitions
    around, guarded by various #ifdefs, and with numbers larger
    than 1024. The idea behind this is to make it easier for
    new architectures to transition from a full list to the reduced
    set. In particular, the new microblaze architecture that should
    migrate to using the generic ABI headers can at least use an
    existing uClibc source tree without major rewrites during the
    conversion.
    Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
    e64a1617
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