Why Can't I use 'float' inside the kernel?
There are 2 main why you shouldn't use the 'float' or 'double' data
type inside of the kernel.
- The kernel does not save the FPU registers, therefore the FPU is
always in an unknown state.
- Due to percision differences on different platforms the value of a
'float' or 'double' can not be completely trusted to be the same.
Tom
On Tue, 30 Jul 2002, John Levon wrote:
> On Tue, Jul 30, 2002 at 02:27:54PM -0700, Ramprasad wrote:
>
> > I wrote a kernel module by using float data type, I need "float" data type
> > to calculate the frequencies. I am getting errors when I use float data
> > type. How can I use "float" data type in Kernel module?
>
> You can't.
>
> (Who wants to write me an FAQ entry for this too :)
>
> john
>
> --
> "The simpler it is, the harder it is."
> - Tim Van Holder
> --
> Kernelnewbies: Help each other learn about the Linux kernel.
> Archive: http://mail.nl.linux.org/kernelnewbies/
> FAQ: http://kernelnewbies.org/faq/
>
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