• Kevin Hao's avatar
    powerpc: Make flush_fp_to_thread() nop when CONFIG_PPC_FPU is disabled · 037f0eed
    Kevin Hao authored
    In the current kernel, the function flush_fp_to_thread() is not
    dependent on CONFIG_PPC_FPU. So most invocations of this function
    is not wrapped by CONFIG_PPC_FPU. Even through we don't really
    save the FPRs to the thread struct if CONFIG_PPC_FPU is not enabled,
    but there does have some runtime overhead such as the check for
    tsk->thread.regs and preempt disable and enable. It really make
    no sense to do that. So make it a nop when CONFIG_PPC_FPU is
    disabled. Also remove the wrapped #ifdef CONFIG_PPC_FPU
    when invoking this function.
    Signed-off-by: default avatarKevin Hao <haokexin@gmail.com>
    Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
    037f0eed
switch_to.h 2.18 KB