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| author | Kevin Hao <haokexin@gmail.com> | 2013-07-14 17:02:05 +0800 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-08-14 14:59:44 +1000 |
| commit | 037f0eed57c3f35367ac32275e45f24e297549e9 (patch) | |
| tree | 87dbec64efb721dae5fd8b0a5c2b634f882631dd /arch/powerpc/kernel/head_fsl_booke.S | |
| parent | 662499d04b6bc73d0ecab0ab876bacd5bbe7d6a7 (diff) | |
| download | linux-037f0eed57c3f35367ac32275e45f24e297549e9.tar.bz2 | |
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 <haokexin@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/kernel/head_fsl_booke.S')
0 files changed, 0 insertions, 0 deletions