Re: [patch] smp-2.3.30-A1, mb(), wmb(), rmb()

Jamie Lokier (lkd@tantalophile.demon.co.uk)
Fri, 26 Nov 1999 12:34:24 +0100

Linus Torvalds wrote:
> #define mb() do { \
> int __dummy; \
> asm volatile("movl %%eax,%0":"=m" (&dummy): :"memory"); \
> } while (0)

Possible tweak: Use %ebp instead of %eax because %ebp isn't written as
often therefore the mb() instruction can sometimes retire sooner...

-- Jamie

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