Re: ADI Blackfin patch for kernel 2.6.14

[Bernd Schmidt]

Andrew Morton wrote:

> > +asmlinkage int sys_bfin_spinlock(int *spinlock)
>
>
> Whoa, that's a syscall I never expected to see.  What's it do?

Replaces the TESTSET instruction, which has a few errata that make it 
unreliable.  It's used by the pthreads library to provide atomic operations.

> Shouldn't
> it be using get_user() and put_user()?  Or will this forever be a nommu
> arch?

We currently don't expect that this code will ever support a MMU, but I 
suppose it could use get/put_user for clarity.


Bernd
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