Re: set_bit() is broken on i386?

[Andreas Schwab]

Trond Myklebust <trond.myklebust@xxxxxxxxxx> writes:

> On Fri, 2006-01-20 at 19:53 -0500, Chuck Ebbert wrote:
>
>> #define ADDR (*(volatile long *) addr)
>> static inline void set_bit(int nr, volatile unsigned long * addr)
>> {
>> 	__asm__ __volatile__( "lock ; "
>> 		"btsl %1,%0"
>> 		:"=m" (ADDR)
>> 		:"Ir" (nr));
>> }
>
> The asm needs a memory clobber in order to avoid reordering with the
> assignment to b[1]:

Check out 2.6.16-rc1, this has already been fixed.

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@xxxxxxx
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
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