On Sat, 2019-05-04 at 04:28 +0200, Sebastian Gottschall wrote: > Using fpu code in kernel space in a kernel module is a derived work > of > the kernel itself? > dont get me wrong, but this is absurd. i mean you limit the use of > cpu > instructions. the use > of cpu instructions should be free of any licensing issue. i would > even > argument you are violating > the license of the cpu ower given to the kernel by executing it, by > restricting its use for no reason Using FPU code in kernel space in a kernel module does not require the use of kernel_fpu_begin/end(). The kernel module could simply disable preemption, save the FPU registers, use the FPU, restore the FPU registers, and reenable preemption. However, using kernel_fpu_begin/end() does get that module some nice optimizations that are specific to Linux. -- All Rights Reversed.
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