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From: torvalds@transmeta.com (Linus Torvalds)
To: linux-kernel@vger.kernel.org
Subject: Re: Re : [CHECKER] 28 potential interrupt errors
Date: 22 Mar 2001 16:56:59 -0800	[thread overview]
Message-ID: <99e70r$uvg$1@penguin.transmeta.com> (raw)
In-Reply-To: <20010322153641.B13162@bougret.hpl.hp.com>

In article <20010322153641.B13162@bougret.hpl.hp.com>,
Jean Tourrilhes  <jt@bougret.hpl.hp.com> wrote:
>
>	I agree that the IrDA stack is full of irq/locking bugs (there
>is a patch of mine waiting in Dag's mailbox), but this one is not a
>bug, it's a false positive.
>	The restore_flags(flags); will restore the state of the
>interrupt register before the cli happened, so will automatically
>reenable interrupts.

Look closer. The error report is a big bogus, because it points out as
an error the "return" that is _correct_, not the "return" that is buggy.

Their checkers verify that all exists out of a function have the same
characteristics, and they found a case where one exit exists with
interrupts still disabled, while another one exists after having done a
"restore_flags()". 

So it looks like a real bug, it's just that the error is the _earlier_
return value, not the one pointed at.

		Linus

      parent reply	other threads:[~2001-03-23  0:58 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-03-22 23:36 Re : [CHECKER] 28 potential interrupt errors Jean Tourrilhes
2001-03-22 23:49 ` Junfeng Yang
2001-03-22 23:59   ` Jean Tourrilhes
2001-03-23  0:56 ` Linus Torvalds [this message]

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