Satyam Sharma wrote:
On 5/11/07, Jonathan Corbet <[email protected]> wrote:
+ - Pointers to data structures in coherent memory which might be
modified
+ by I/O devices can, sometimes, legitimately be volatile. A ring
buffer
+ used by a network adapter, where that adapter changes pointers to
+ indicate which descriptors have been processed, is an example of
this
+ type of situation.
is a legitimate use case for volatile is still not clear to me (I
IMO it is not. We do /not/ want to encourage volatile use in those
cases, and indeed, it's not necessary even if you can rationalize the
use of the English word "volatile" to describe the situation.
Drivers work quite well without volatile in such situations.
Jeff
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