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SubjectRe: [PATCH 1/2] KVM: MMU: fix SMAP virtualization
>> This breaks older compilers that can't initialize anon structures.
>
> How old ? Even gcc 3.1 says you can use unnamed struct/union fields and
> 3.2 is the minimum version required to compile the kernel as mentioned
> in the README.
>
> We could simply just name the structure, but I doubt this is the
> only place in the kernel code where it's being used this way :)

This appears to be GCC bug #10676, see <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=10676>
Says it was fixed in 4.6, but I believe the kernel supports GCCs much older
than that (back to 3.2). I personally hit it on 4.4.7, the version shipped
with RHEL6.6.
So I think the kernel code has to change, probably by naming the structure.


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