linux-kernel - Re: [PATCH v2 2/2] memory: ti-emif-sram: introduce relocatable suspend/resume handlers

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Date:   Tue, 20 Jun 2017 14:03:35 -0500
From:   Dave Gerlach <d-gerlach@...com>
To:     Russell King - ARM Linux <linux@...linux.org.uk>
CC:     Rob Herring <robh+dt@...nel.org>, Tony Lindgren <tony@...mide.com>,
        Santosh Shilimkar <ssantosh@...nel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-omap@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>, Keerthy J <j-keerthy@...com>
Subject: Re: [PATCH v2 2/2] memory: ti-emif-sram: introduce relocatable
 suspend/resume handlers

Hi,
On 06/20/2017 09:42 AM, Russell King - ARM Linux wrote:
> On Fri, May 19, 2017 at 12:57:08PM -0500, Dave Gerlach wrote:
>> +	.arm
>> +	.align 3
>> +
>> +ENTRY(ti_emif_sram)
> 
> Will you ever want to have any of this code as Thumb?

I cannot see any requirement for that. I will say it is tested and
inter-operates happily with CONFIG_THUMB_KERNEL, but because it's constrained to
am335x and am437x I don't think there are unknown situations where every single
instruction must be THUMB.

> 
>> +extern inline void ti_emif_offsets(void)
>> +{
> 
> "extern inline" is frowned upon in the kernel - any reason this
> can't be "static inline" ?

It should be static.

> 
> Any reason not to provide a stub for when it's not configured,
> and eliminate the ifdef in arch/arm/kernel/asm-offsets.c ?
> 

No, I just was following the ifdef example set by others in the file, a stub
would be cleaner I agree.

Regards,
Dave