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Date: Fri, 29 Apr 2011 15:47:19 +0530 From: viresh kumar <viresh.kumar@...com> To: Russell King - ARM Linux <linux@....linux.org.uk> Cc: Shiraz HASHIM <shiraz.hashim@...com>, "vinod.koul@...el.com" <vinod.koul@...el.com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Armando VISCONTI <armando.visconti@...com>, "viresh.linux@...il.com" <viresh.linux@...il.com>, "dan.j.williams@...el.com" <dan.j.williams@...el.com>, "linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org> Subject: Re: [PATCH V3 2/7] dmaengine/dw_dmac: Replace spin_lock* with irqsave variants On 04/29/2011 02:45 PM, Russell King - ARM Linux wrote: > BTW, how this gets handled in other drivers is basically as follows in > the tasklet: > > tasklet() > { > LIST_HEAD(completed); > > spin_lock_irqsave(lock, flags); > for each txd(txd) { > if (completed(txd)) > list_move_tail(&txd->node, &completed); > } > try to start new txd(); > spin_unlock_irqrestore(lock, flags); > > for each list entry safe(txd, &completed) { > void (*callback)(void *) = txd->callback; > void *param = txd->callback_param; > > free_txd(txd); > > if (callback) > callback(param); > } > } > > I'm not sure how easy it is to move dw_dmac to that kind of structure, I will check that. -- viresh -- 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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