Re: Build regressions/improvements in v3.4-rc7

[John David Anglin]

On 16-May-12, at 10:46 AM, James Bottomley wrote:

> Wow, lib/mpi/ is a complete horror: it's full of hand crafted asm  
> code.
> The error in this case appears to be that umul_ppm() is implemented as
> an xmpyu instruction.  That's a floating point instruction.  We
> deliberately compile the kernel with floating point disabled because  
> we
> don't want to save and restore the floating point register file on  
> each
> context switch, hence the operand constraints are unsatisfiable.

I haven't tried this but I think the parisc implementation of umul_ppmm
can be deleted.  There is a generic version in the file.

Dave
--
John David Anglin	dave.anglin@xxxxxxxx



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