From: arnd@arndb.de (Arnd Bergmann)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 2/2] serial: fsl_lpuart: add DMA support
Date: Thu, 16 Jan 2014 11:47:12 +0100 [thread overview]
Message-ID: <201401161147.13522.arnd@arndb.de> (raw)
In-Reply-To: <4a519c52821b4ceb841cbefcf2a0432b@BL2PR03MB338.namprd03.prod.outlook.com>
On Thursday 16 January 2014, Yao Yuan wrote:
> > This part will result in a slight increase in data size even if dma
> > support is turned off at compile time.
> >
>
> Yes, someone also want me define a independent struct for dma and allocate the memory when dma be use.
> But I think this way will add a more memory access time, like a->b->c and a->c. And the variable
> about dma is just a few bytes but used frequently. So I think I'd better define the variable about dma in lpuart_port struct.
I agree. Just leave it unconditionally in here to make the code simpler.
Arnd
next prev parent reply other threads:[~2014-01-16 10:47 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-15 5:21 [PATCH v3 1/2] ARM: dts: vf610: lpuart: Add eDMA support Yuan Yao
2014-01-15 5:21 ` [PATCH v3 2/2] serial: fsl_lpuart: add DMA support Yuan Yao
2014-01-15 9:25 ` Arnd Bergmann
2014-01-16 6:02 ` Yao Yuan
2014-01-16 8:19 ` Yao Yuan
2014-01-16 10:47 ` Arnd Bergmann [this message]
2014-01-15 11:05 ` Mark Rutland
2014-01-15 11:17 ` Arnd Bergmann
2014-01-15 13:50 ` Mark Rutland
2014-01-16 6:54 ` Yao Yuan
2014-01-22 3:41 ` Yao Yuan
-- strict thread matches above, loose matches on Subject: below --
2014-01-15 5:24 [PATCH v3 0/2] " Yuan Yao
2014-01-15 5:24 ` [PATCH v3 2/2] " Yuan Yao
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