Re: [PATCH v2 1/2] ARM: Fix some check warnings of tool sparse

From: Leizhen (ThunderTown)
Date: Mon Oct 10 2022 - 22:14:36 EST

On 2022/10/11 0:05, Russell King (Oracle) wrote:
> On Mon, Oct 10, 2022 at 05:53:45PM +0800, Zhen Lei wrote:
>> Fix the following warnings:
>> warning: incorrect type in initializer (different address spaces)
>> expected unsigned short [noderef] __user *register __p
>> got unsigned short [usertype] *
>> warning: cast removes address space '__user' of expression
> I have a general principle that not all warnings should be fixed,
> especially when it comes to sparse.

OK, I got it.

> The aim is not to get to zero warnings - it's to get to a point where
> the code is correct, and plastering the code with __force casts means
> it isn't correct - you're just masking the warning.
> So no, I really don't like this. And I really don't like seeing
> __force being used in open code in casts.

OK, I will clear only the first warning and leave the second warning.


Zhen Lei