linux-kernel - Re: block/blk-zoned.c:579:5-24: WARNING: atomic_dec_and_test variation before object free at line 583.

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Message-ID: <e86904d7-bf42-4b38-889e-3978e89358f2@kernel.dk>
Date: Tue, 5 Nov 2024 08:36:33 -0700
From: Jens Axboe <axboe@...nel.dk>
To: Christoph Hellwig <hch@....de>, kernel test robot <lkp@...el.com>
Cc: Damien Le Moal <dlemoal@...nel.org>, oe-kbuild-all@...ts.linux.dev,
 linux-kernel@...r.kernel.org, Hannes Reinecke <hare@...e.de>,
 "Martin K. Petersen" <martin.petersen@...cle.com>,
 Bart Van Assche <bvanassche@....org>
Subject: Re: block/blk-zoned.c:579:5-24: WARNING: atomic_dec_and_test
 variation before object free at line 583.

On 11/5/24 8:34 AM, Christoph Hellwig wrote:
> On Tue, Nov 05, 2024 at 06:52:25AM +0800, kernel test robot wrote:
>>>> block/blk-zoned.c:579:5-24: WARNING: atomic_dec_and_test variation before object free at line 583.
> 
> Does anyone know what this warning is supposed to mean?

It's supposed to mean "use refcount_t for things like this".

-- 
Jens Axboe