From: Andi Kleen <ak@suse.de>
Date: 19 Oct 2002 02:07:41 +0200
> -/* Enable FXSR and company _before_ testing for FP problems. */
> - /*
> - * Verify that the FXSAVE/FXRSTOR data will be 16-byte aligned.
> - */
> - if (offsetof(struct task_struct, thread.i387.fxsave) & 15) {
> - extern void __buggy_fxsr_alignment(void);
> - __buggy_fxsr_alignment();
> - }
Why does that not work? IMHO it is legal ISO-C
Depending upon the compiler to optimize away the non-existent function
reference is not ISO-C :-) Although the fact the Intel compiler isn't
doing this is amusing.
-
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