Re: [PATCH 201/208] x86/fpu: Clean up xstate feature reservation

[Dave Hansen]

On 05/05/2015 10:58 AM, Ingo Molnar wrote:
>  struct xregs_state {
>  	struct fxregs_state		i387;
>  	struct xstate_header		header;
> -	struct ymmh_struct		ymmh;
> -	struct lwp_struct		lwp;
> -	struct bndreg			bndreg[4];
> -	struct bndcsr			bndcsr;
> -	/* New processor state extensions will go here. */
> +	u8				__reserved[XSTATE_RESERVE];
>  } __attribute__ ((packed, aligned (64)));

Just to reiterate.  The size of 'XSTATE_RESERVE' is completely unknown
at compile time.  It's wrong in the existing kernel, but we should fix
it up instead of mucking with it like this.
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