> +struct sgx_encl_page {
> +     unsigned long addr;
> +     unsigned int flags;
> +     void *epc_page;
> +     struct sgx_va_page *va_page;
> +     unsigned int va_offset;
> +     struct list_head list;
> +};

This can be without major streches hoops packed way more. There are 12
bits free for use in the addr field. I can use low three bits for flags
and upper nine bits for va_offset.

I think I can also quite easily union epc_page and va_page fields.

With these changes the struct would shrink to:

struct sgx_encl_page {
        unsigned long addr;
        union {
                void *epc_page;
                struct sgx_va_page *va_page;
        };
        struct list_head list;
};

I can rework this for v7.

/Jarkko

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