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Subject: Re: [PATCH] Fix the cpumask rewrite
From: James Bottomley <James.Bottomley@steeleye.com>
To: Linus Torvalds <torvalds@osdl.org>
Cc: Andrew Morton <akpm@osdl.org>, Paul Jackson <pj@sgi.com>,
       PARISC list <parisc-linux@lists.parisc-linux.org>,
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Date: 26 Jun 2004 14:33:55 -0500
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On Sat, 2004-06-26 at 14:11, Linus Torvalds wrote:
> It seems the pa-risc optimizer for gcc is somehow broken. I just checked 
> on x86:
> 
> 	#define test_bit(x,y) \
> 	        (!!((1ul << x) & *(y)))
> 
> 	int test(unsigned long *a)
> 	{
> 	        while (test_bit(0, a));
> 	}

OK, this one definitely compiles to a non reaload loop on parisc.  I
concede we need the volatile.

James