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

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

From: Satyam Sharma <hidden>
Date: 2007-08-18 01:28:56
Also in: lkml, netdev


On Fri, 17 Aug 2007, Christoph Lameter wrote:
On Fri, 17 Aug 2007, Paul E. McKenney wrote:
quoted
On Sat, Aug 18, 2007 at 08:09:13AM +0800, Herbert Xu wrote:
quoted
On Fri, Aug 17, 2007 at 04:59:12PM -0700, Paul E. McKenney wrote:
quoted
gcc bugzilla bug #33102, for whatever that ends up being worth.  ;-)
I had totally forgotten that I'd already filed that bug more
than six years ago until they just closed yours as a duplicate
of mine :)

Good luck in getting it fixed!
Well, just got done re-opening it for the third time.  And a local
gcc community member advised me not to give up too easily.  But I
must admit that I am impressed with the speed that it was identified
as duplicate.

Should be entertaining!  ;-)
Right. ROTFL... volatile actually breaks atomic_t instead of making it 
safe. x++ becomes a register load, increment and a register store. Without 
volatile we can increment the memory directly.
No code does (or would do, or should do):

	x.counter++;

on an "atomic_t x;" anyway.
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