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From: Carlos O'Donell <carlos@baldric.uwo.ca>
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Subject: Re: [parisc-linux] warning: minor abi change
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> > I can't really come up with a scenario where userspace passes a function
> > pointer to the kernel and has the kernel call or compare the function
> > pointer?
> 
> One example is sigaction.

Fixable, I can stick a sigaction wrapper in userspace. Should we though?

c.