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Date: Tue, 10 Jun 2014 17:04:55 +0200 From: Marek Polacek <polacek@...hat.com> To: Peter Zijlstra <peterz@...radead.org> Cc: Jiri Kosina <jkosina@...e.cz>, Linus Torvalds <torvalds@...ux-foundation.org>, "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>, Andrew Morton <akpm@...ux-foundation.org>, Martin Jambor <mjambor@...e.cz>, Petr Mladek <pmladek@...e.cz>, linux-kernel@...r.kernel.org, gcc@....gnu.org Subject: Re: [PATCH] tell gcc optimizer to never introduce new data races On Tue, Jun 10, 2014 at 04:53:27PM +0200, Peter Zijlstra wrote: > On Tue, Jun 10, 2014 at 03:23:36PM +0200, Jiri Kosina wrote: > > +# Tell gcc to never replace conditional load with a non-conditional one > > +KBUILD_CFLAGS += $(call cc-option,--param allow-store-data-races=0) > > + > > Why do we not want: -fmemory-model=safe? And should we not at the very > least also disable packed-store-data-races? Note that the option does not exist, even though it is mentioned in the documentation. Marek -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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