From: "Russell King (Oracle)" <linux@armlinux.org.uk>
To: Zhen Lei <thunder.leizhen@huawei.com>
Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 1/2] ARM: Fix some check warnings of tool sparse
Date: Mon, 10 Oct 2022 17:05:47 +0100 [thread overview]
Message-ID: <Y0RC213QSASPZekQ@shell.armlinux.org.uk> (raw)
In-Reply-To: <20221010095346.1957-2-thunder.leizhen@huawei.com>
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.
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.
--
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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next prev parent reply other threads:[~2022-10-10 16:06 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-10 9:53 [PATCH v2 0/2] ARM: Make the dumped instructions are consistent with the disassembled ones Zhen Lei
2022-10-10 9:53 ` [PATCH v2 1/2] ARM: Fix some check warnings of tool sparse Zhen Lei
2022-10-10 10:20 ` Ard Biesheuvel
2022-10-10 10:58 ` Leizhen (ThunderTown)
2022-10-10 11:06 ` Ard Biesheuvel
2022-10-10 16:08 ` Russell King (Oracle)
2022-10-10 16:14 ` Ard Biesheuvel
2022-10-10 16:17 ` Russell King (Oracle)
2022-10-11 2:29 ` Leizhen (ThunderTown)
2022-10-13 10:51 ` Russell King (Oracle)
2022-10-13 11:34 ` Leizhen (ThunderTown)
2022-11-28 8:39 ` Leizhen (ThunderTown)
2022-10-10 16:05 ` Russell King (Oracle) [this message]
2022-10-11 2:13 ` Leizhen (ThunderTown)
2022-10-13 1:28 ` Leizhen (ThunderTown)
2022-10-10 9:53 ` [PATCH v2 2/2] ARM: Make the dumped instructions are consistent with the disassembled ones Zhen Lei
2022-10-10 10:10 ` Ard Biesheuvel
2022-10-10 10:46 ` Leizhen (ThunderTown)
2022-10-10 11:07 ` Ard Biesheuvel
2022-10-10 11:29 ` Leizhen (ThunderTown)
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