From: Ralf Baechle <ralf@linux-mips.org>
To: Kip Walker <kwalker@broadcom.com>
Cc: linux-mips@linux-mips.org
Subject: Re: __volatile__ for asms in unaligned.c
Date: Fri, 21 Feb 2003 02:09:51 +0100 [thread overview]
Message-ID: <20030221020950.E6463@linux-mips.org> (raw)
In-Reply-To: <3E555A2E.5920F387@broadcom.com>; from kwalker@broadcom.com on Thu, Feb 20, 2003 at 02:43:58PM -0800
On Thu, Feb 20, 2003 at 02:43:58PM -0800, Kip Walker wrote:
> Anyway, is there a reason these aren't marked as volatile? The gcc docs
> have the scary comment "You can prevent an `asm' instruction from being
> deleted, MOVED SIGNIFICANTLY, or combined, by writing the keyword
> `volatile' after the`asm'."
It's a valid code movement by gcc's no longer really new basic block
reordering thing. I admit I'm pretty surprised this wasn't found before.
So I just added the volatiles.
Ralf
prev parent reply other threads:[~2003-02-21 1:10 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-02-20 22:43 __volatile__ for asms in unaligned.c Kip Walker
2003-02-21 1:09 ` Ralf Baechle [this message]
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