Re: [PATCH 0/24] make atomic_read() behave consistently across all architectures

Herbert Xu wrote:

On Wed, Aug 15, 2007 at 08:05:38PM +0530, Satyam Sharma wrote:

quoted

quoted

I don't know if this here is affected:

[...something like]
	b = atomic_read(a);
	for (i = 0; i < 4; i++) {
		msleep_interruptible(63);
		c = atomic_read(a);
		if (c != b) {
			b = c;
			i = 0;
		}
	}

Nope, we're calling schedule which is a rather heavy-weight
barrier.

How does the compiler know that msleep() has got barrier()s?
-- 
Stefan Richter
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http://arcgraph.de/sr/