• Arnd Bergmann's avatar
    ARM: always use ARM_UNWIND for thumb2 kernels · 89bace65
    Arnd Bergmann authored
    Thumb2 kernels cannot be built with frame pointers, but can use the
    ARM_UNWIND feature for unwinding instead. This makes sure that all
    features that rely on unwinding includeing CONFIG_LATENCYTOP and
    FAULT_INJECTION_STACKTRACE_FILTER do not enable frame pointers
    when the unwinder is already selected, and we always build with
    the unwinder when we want a thumb2 kernel, to make sure we do not
    get the frame pointers instead.
    
    A different option would be to redefine the CONFIG_FRAME_POINTERS
    option on ARM to mean builing with either frame pointers or
    the unwinder, and then select which one to use based on the
    CPU architecture or another user option. That would still allow
    building thumb2 kernels without the unwinder but would also be
    more confusing.
    Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
    89bace65
Kconfig 58.7 KB