linux-kernel - Re: [PATCH] blk-iocost: fix seq_printf compile type mismatch error

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Message-ID: <7044d6b3-a5d1-572d-a755-74f8d4fd31c5@amd.com>
Date:   Tue, 18 Jul 2023 10:37:23 -0500
From:   Carlos Bilbao <carlos.bilbao@....com>
To:     Tejun Heo <tj@...nel.org>
Cc:     josef@...icpanda.com, axboe@...nel.dk, cgroups@...r.kernel.org,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        amd <amd@...alhost.localdomain>
Subject: Re: [PATCH] blk-iocost: fix seq_printf compile type mismatch error

On 7/17/23 13:49, Tejun Heo wrote:
> On Mon, Jul 17, 2023 at 09:18:52AM -0500, Carlos Bilbao wrote:
>> From: amd <amd@...alhost.localdomain>
>>
>> Fix two type mismatch errors encountered while compiling blk-iocost.c with
>> GCC version 13.1.1 that involved constant operator WEIGHT_ONE. Cast the
>> result of the division operation to (unsigned int) to match the expected
>> format specifier %u in two seq_printf invocations.
> 
> Can you detail the warnings? Was that on 32bit compiles?

The concrete error was: "format ‘%u’ expects argument of type ‘unsigned
int’, but argument 3 has type ‘long unsigned int’". If I run:

$ echo | cpp -dM | grep __LP64__
#define __LP64__ 1

which makes me believe it is not 32 bits.

> 
> Thanks.
> 

Thanks,
Carlos