From: Kevin Hao Date: Sun, 14 Jul 2013 09:02:05 +0000 (+0800) Subject: powerpc: Make flush_fp_to_thread() nop when CONFIG_PPC_FPU is disabled X-Git-Tag: v3.12-rc1~123^2~65 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=037f0eed57c3f35367ac32275e45f24e297549e9;p=pandora-kernel.git powerpc: Make flush_fp_to_thread() nop when CONFIG_PPC_FPU is disabled 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: Kevin Hao Signed-off-by: Benjamin Herrenschmidt --- Reading git-diff-tree failed