Re: 2.6-test2: gcc-3.3.1 warning.

[Richard Henderson]

On Tue, Jul 29, 2003 at 08:35:07AM -0700, Randy.Dunlap wrote:
> I really hate to get this back to the original problem, but is
> the reported warning a gcc 3.3.x problem?  I don't see the assembly
> problem here.
> 
> | arch/i386/kernel/reboot.c: In function `machine_restart':
> | arch/i386/kernel/reboot.c:261: warning: use of memory input without
> | lvalue in asm operand 0 is deprecated


	static long no_idt[2];
	...
	__asm__ __volatile__("lidt %0": :"m" (no_idt));

Notice that no_idt is an array.  Therefore its identifier decays
into a pointer.  Therefore, what this statement is really asking
for is

	{
	  long *tmp = no_idt;
	  asm volatile ("lidt %0" : : "m" (*&tmp));
	}

which is clearly not what was intended.

Fixed by doing

	__asm__ __volatile__("lidt %0": :"m" (*no_idt));



r~
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