>I read the code of laze FPU state saving and confirmed that
>if the function does not generate exception than
>'kernel_fpu_begin/end()' should assure fpu safe inside kernel.
>
>However, it is not enough where exception could rise, as Takahashi
>mentioned.
I had prototyped an exception safe kfpu framework, but then I didn't have the time to submit/cleanup it.
http://www.colorfullife.com/~manfred/linux-2.5/sse/patch-kfpu
Have you tried SSE based copy_to_user? With SSE, you can just save the affected registers, without unexpected sideeffects.
-- Manfred- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Sat Nov 23 2002 - 22:00:28 EST