Thread (305 messages) 305 messages, 27 authors, 2007-09-11

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

From: Herbert Xu <herbert@gondor.apana.org.au>
Date: 2007-08-15 12:06:01
Also in: linux-arch, lkml

On Wed, Aug 15, 2007 at 12:35:31PM +0200, Stefan Richter wrote:
LDD3 says on page 125:  "The following operations are defined for the
type [atomic_t] and are guaranteed to be atomic with respect to all
processors of an SMP computer."

Doesn't "atomic WRT all processors" require volatility?
Not at all.  We also require this to be atomic without any
hint of volatility.

	extern int foo;
	foo = 4;

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} [off-list ref]
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
Keyboard shortcuts
hback out one level
jnext message in thread
kprevious message in thread
ldrill in
Escclose help / fold thread tree
?toggle this help