lkml.org 
[lkml]   [2022]   [Apr]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [PATCH 1/4] scsi: core: constify pointer to scsi_host_template
From
On 08/04/2022 13:32, Krzysztof Kozlowski wrote:
> On 08/04/2022 14:14, John Garry wrote:
>> On 08/04/2022 11:30, Krzysztof Kozlowski wrote:
>>> Several pointers to 'struct scsi_host_template' do not modify it, so
>>> made them const for safety.
>>>
>> Is this standard practice? What is so special here?
> This is standard practice and there is nothing special here. Pointers to
> const are preferred because:
> 1. They add safety if data is actually const. This is not yet the case,
> but scsi_host_template allocation could be made const with some effort.

To me this seems better, but I think that some drivers might modify
their scsi_host_template (so not possible)

> 2. The more const variables, the easier function contents and its impact
> is to understand. This is actually the biggest benefit when dealing with
> code touching different structures.
>
> In general, constifying is a common practice everywhere in the kernel.

Thanks,
John

\
 
 \ /
  Last update: 2022-04-08 14:58    [W:0.072 / U:0.072 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site