Re: [PATCHv9 1/5] arm64: io: Use asm-generic high level MMIO accessors

From: Sai Prakash Ranjan <quic_saipraka@quicinc.com>
To: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
	Marc Zyngier <maz@kernel.org>,
	Steven Rostedt <rostedt@goodmis.org>,
	gregkh <gregkh@linuxfoundation.org>, <quic_psodagud@quicinc.com>,
	Trilok Soni <quic_tsoni@quicinc.com>,
	<linux-kernel@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-arm-msm@vger.kernel.org>
Subject: Re: [PATCHv9 1/5] arm64: io: Use asm-generic high level MMIO accessors
Date: Thu, 10 Feb 2022 13:06:41 +0530	[thread overview]
Message-ID: <a64cefd2-7dfa-c86c-f1aa-461699253b62@quicinc.com> (raw)
In-Reply-To: <YgQNiXsh4hC+5+O5@arm.com>

On 2/10/2022 12:22 AM, Catalin Marinas wrote:
> On Mon, Jan 24, 2022 at 12:03:30PM +0530, Sai Prakash Ranjan wrote:
>> Remove custom arm64 MMIO accessors read{b,w,l,q} and their relaxed
>> versions in support to use asm-generic defined accessors. Also define
>> one set of IO barriers (ar/bw version) used by asm-generic code to
>> override the arm64 specific variants.
>>
>> Suggested-by: Arnd Bergmann <arnd@arndb.de>
>> Signed-off-by: Sai Prakash Ranjan <quic_saipraka@quicinc.com>
> I'm fine with this patch:
>
> Acked-by: Catalin Marinas <catalin.marinas@arm.com>

Thanks!

>> diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h
>> index 7fd836bea7eb..1b436810d779 100644
>> --- a/arch/arm64/include/asm/io.h
>> +++ b/arch/arm64/include/asm/io.h
> [...]
>> +/* arm64-specific, don't use in portable drivers */
>> +#define __iormb(v)		__io_ar(v)
>> +#define __iowmb()		__io_bw()
>> +#define __iomb()		dma_mb()
> However, I'd like to see a few subsequent patches that get rid of the
> __io*mb() uses in drivers/ (there don't seem to be that many).
>

Sure, I will do these in next version of this series. Hoping to get 
reviews on other patches
as well so I can include all the changes in the next version.

Thanks,
Sai