• Roland McGrath's avatar
    x86_64 syscall audit fast-path · 86a1c34a
    Roland McGrath authored
    This adds a fast path for 64-bit syscall entry and exit when
    TIF_SYSCALL_AUDIT is set, but no other kind of syscall tracing.
    This path does not need to save and restore all registers as
    the general case of tracing does.  Avoiding the iret return path
    when syscall audit is enabled helps performance a lot.
    Signed-off-by: default avatarRoland McGrath <roland@redhat.com>