linux-kernel - Re: [PATCH net-next 2/4] net: ipa: introduce dma_addr

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Date:   Wed, 17 Mar 2021 16:00:33 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Alex Elder <elder@...e.org>, Alex Elder <elder@...aro.org>,
        davem@...emloft.net, kuba@...nel.org
Cc:     bjorn.andersson@...aro.org, evgreen@...omium.org,
        cpratapa@...eaurora.org, subashab@...eaurora.org, elder@...nel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next 2/4] net: ipa: introduce dma_addr_high32()



On 3/17/2021 3:49 PM, Alex Elder wrote:
> On 3/17/21 5:47 PM, Florian Fainelli wrote:
>>> +/* Encapsulate extracting high-order 32 bits of DMA address */
>>> +static u32 dma_addr_high32(dma_addr_t addr)
>>> +{
>>> +#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
>>> +    return (u32)(addr >> 32);
>> You can probably use upper_32bits() here...
> 
> Where is that defined?  I'd be glad to use it.    -Alex

include/linux/kernel.h, and it is upper_32_bits() and lower_32_bits()
sorry about the missing space.
-- 
Florian