linux-kernel - Re: [PATCH] dm-raid: do not include dm-core.h

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Message-ID: <afc231d5-6c49-3edf-fde4-3eff376c02bd@huaweicloud.com>
Date: Mon, 21 Jul 2025 14:05:06 +0800
From: Yu Kuai <yukuai1@...weicloud.com>
To: Pavel Tikhomirov <ptikhomirov@...tuozzo.com>,
 Alasdair Kergon <agk@...hat.com>, Mike Snitzer <snitzer@...nel.org>,
 Mikulas Patocka <mpatocka@...hat.com>
Cc: Xiao Ni <xni@...hat.com>, dm-devel@...ts.linux.dev,
 linux-kernel@...r.kernel.org, Konstantin Khorenko <khorenko@...tuozzo.com>,
 Denis Lunev <den@...tuozzo.com>, "yukuai (C)" <yukuai3@...wei.com>
Subject: Re: [PATCH] dm-raid: do not include dm-core.h

在 2025/07/21 11:49, Pavel Tikhomirov 写道:
> In commit 4cc96131afce ("dm: move request-based code out to dm-rq.[hc]")
> we have a note: "DM targets should _never_ include dm-core.h!". And it
> is not used in any DM targets except dm-raid now, so let's remove it
> from dm-raid for consistency, also use special helpers instead of
> accessing dm_table and mapper_device fields directly. This change is
> merely a cleanup and should not affect functionality.
> 
> Fixes: 7168be3c8a6b ("md: record dm-raid gendisk in mddev")
> Signed-off-by: Pavel Tikhomirov <ptikhomirov@...tuozzo.com>
> ---
>   drivers/md/dm-raid.c | 3 +--
>   1 file changed, 1 insertion(+), 2 deletions(-)
> 
Reviewed-by: Yu Kuai <yukuai3@...wei.com>
Thanks

> diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c
> index e8c0a8c6fb51..4fb5ddf50560 100644
> --- a/drivers/md/dm-raid.c
> +++ b/drivers/md/dm-raid.c
> @@ -14,7 +14,6 @@
>   #include "raid5.h"
>   #include "raid10.h"
>   #include "md-bitmap.h"
> -#include "dm-core.h"
>   
>   #include <linux/device-mapper.h>
>   
> @@ -3305,7 +3304,7 @@ static int raid_ctr(struct dm_target *ti, unsigned int argc, char **argv)
>   
>   	/* Disable/enable discard support on raid set. */
>   	configure_discard_support(rs);
> -	rs->md.dm_gendisk = ti->table->md->disk;
> +	rs->md.dm_gendisk = dm_disk(dm_table_get_md(ti->table));
>   
>   	mddev_unlock(&rs->md);
>   	return 0;
>