Date: Mon, 11 Mar 2002 16:20:45 +0000 From: Nigel Horne <njh@smsltd.demon.co.uk> To: aic7xxx@FreeBSD.ORG Subject: Re: ahc_platform_abort_scbs() Message-ID: <200203111620.g2BGKk004690@njh-1.tadpole.co.uk> In-Reply-To: <200203111615.g2BGFpI11861@aslan.scsiguy.com> References: <200203111615.g2BGFpI11861@aslan.scsiguy.com>
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On Monday 11 March 2002 4:15 pm, Justin T. Gibbs wrote:
> I must be reading different code than you. From the 6.2.5 linux driver:
Let me reword the issue in a different way.
From queue.h:
#define TAILQ_FIRST(head) ((head)->tqh_first)
#define TAILQ_REMOVE(head, elm, field) do { \
if ((TAILQ_NEXT((elm), field)) != NULL) \
TAILQ_NEXT((elm), field)->field.tqe_prev = \
(elm)->field.tqe_prev; \
else \
(head)->tqh_last = (elm)->field.tqe_prev; \
*(elm)->field.tqe_prev = TAILQ_NEXT((elm), field); \
} while (0)
The TAILQ_REMOVE macro does not touch tqh_first, so how can
while((acmd = busyq->tqh_first) != NULL) { // macro written out
possibly stop when the loop does not alter the value busyq->tqh_first?
-Nigel
--
Nigel Horne. Arranger, Composer, Conductor, Typesetter.
http://www.bandsman.co.uk/music.htm ICQ#20252325
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