Re: [2.6 PATCH] Exporting mmu_cr4_features again for i386 & x86_64

[Andi Kleen]

On Thursday 29 June 2006 01:01, Milena Milenkovic wrote:
> Hi all,
> 
> The mmu_cr4_features variable was "unexported" in 2.6.12 kernel
> (A patch submitted by Adrian Bunk, [2.6 patch] unexport mmu_cr4_features).

Normal policy is to unexport symbols that are not used in the core 
kernel.

However I think there is a deprecation policy with prior 
warning that might not have been followed here.

> However, this variable is needed if a loadable kernel module wants to 
> enable
> access to performance counters from user space.

Ok I guess it's a reasonable request (although we will likely
eventually add a standard API for this and then it might 
be removed again) 


-Andi
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