From: Sergey Senozhatsky <senozhatsky@chromium.org>
To: Andrey Skvortsov <andrej.skvortzov@gmail.com>,
Christophe JAILLET <christophe.jaillet@wanadoo.fr>,
Venkat Rao Bagalkote <venkat88@linux.vnet.ibm.com>,
Minchan Kim <minchan@kernel.org>,
Sergey Senozhatsky <senozhatsky@chromium.org>,
Jens Axboe <axboe@kernel.dk>,
Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, linux-block@vger.kernel.org,
stable@vger.kernel.org
Subject: Re: [PATCH v3] zram: don't free statically defined names
Date: Tue, 24 Sep 2024 14:10:27 +0900 [thread overview]
Message-ID: <20240924051027.GJ38742@google.com> (raw)
In-Reply-To: <ZvHurCYlCoi1ZTCX@skv.local>
On (24/09/24 01:41), Andrey Skvortsov wrote:
[..]
> > > +++ b/drivers/block/zram/zram_drv.c
> > > @@ -2115,8 +2115,10 @@ static void zram_destroy_comps(struct zram *zram)
> > > zram->num_active_comps--;
> > > }
> > > - for (prio = ZRAM_SECONDARY_COMP; prio < ZRAM_MAX_COMPS; prio++) {
> > > - kfree(zram->comp_algs[prio]);
> > > + for (prio = ZRAM_PRIMARY_COMP; prio < ZRAM_MAX_COMPS; prio++) {
> > > + /* Do not free statically defined compression algorithms */
> > > + if (zram->comp_algs[prio] != default_compressor)
> > > + kfree(zram->comp_algs[prio]);
> >
> > Hi,
> >
> > maybe kfree_const() to be more future proof and less verbose?
>
> kfree_const() will not work if zram is built as a module. It works
> only for .rodata for kernel image. [1]
Indeed. It probably shouldn't even be exported; same for
kstrdup_const() [1]
[1] https://lore.kernel.org/linux-mm/20240924050937.697118-1-senozhatsky@chromium.org
next prev parent reply other threads:[~2024-09-24 5:10 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-23 16:48 [PATCH v3] zram: don't free statically defined names Andrey Skvortsov
2024-09-23 17:40 ` Christophe JAILLET
2024-09-23 22:41 ` Andrey Skvortsov
2024-09-24 5:10 ` Sergey Senozhatsky [this message]
2024-09-24 5:21 ` Christophe JAILLET
2024-09-24 5:41 ` Sergey Senozhatsky
2024-09-24 5:49 ` Sergey Senozhatsky
2024-09-24 5:58 ` Sergey Senozhatsky
2024-09-24 6:50 ` Sergey Senozhatsky
2024-09-24 1:46 ` Sergey Senozhatsky
2024-09-24 1:42 ` Sergey Senozhatsky
2024-09-24 5:17 ` Sergey Senozhatsky
2024-09-24 8:15 ` Venkat Rao Bagalkote
2024-09-24 15:56 ` Chris Li
2024-09-24 18:29 ` Chris Li
2024-09-25 0:37 ` Sergey Senozhatsky
2024-09-25 4:04 ` Chris Li
2024-09-27 22:59 ` Chris Li
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