Re: [PATCH 19/19] iomap: remove IOMAP_F_ZONE_APPEND

From: "Darrick J. Wong" <djwong@kernel.org>
To: Christoph Hellwig <hch@lst.de>
Cc: Chris Mason <clm@fb.com>, Josef Bacik <josef@toxicpanda.com>,
	David Sterba <dsterba@suse.com>,
	Damien Le Moal <damien.lemoal@wdc.com>,
	Naohiro Aota <naohiro.aota@wdc.com>,
	Johannes Thumshirn <johannes.thumshirn@wdc.com>,
	Qu Wenruo <wqu@suse.com>, Jens Axboe <axboe@kernel.dk>,
	linux-block@vger.kernel.org, linux-btrfs@vger.kernel.org,
	linux-fsdevel@vger.kernel.org,
	Damien Le Moal <damien.lemoal@opensource.wdc.com>
Subject: Re: [PATCH 19/19] iomap: remove IOMAP_F_ZONE_APPEND
Date: Mon, 21 Nov 2022 09:07:18 -0800	[thread overview]
Message-ID: <Y3uwRr9XQSKzBp1g@magnolia> (raw)
In-Reply-To: <20221120124734.18634-20-hch@lst.de>

On Sun, Nov 20, 2022 at 01:47:34PM +0100, Christoph Hellwig wrote:
> No users left now that btrfs takes REQ_OP_WRITE bios from iomap and
> splits and converts them to REQ_OP_ZONE_APPEND internally.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>

I suspect the flags definition changes will collide with Dave's write
race fix, but otherwise this looks ok,
Reviewed-by: Darrick J. Wong <djwong@kernel.org>

--D

> ---
>  fs/iomap/direct-io.c  | 10 ++--------
>  include/linux/iomap.h |  1 -
>  2 files changed, 2 insertions(+), 9 deletions(-)
> 
> diff --git a/fs/iomap/direct-io.c b/fs/iomap/direct-io.c
> index 4eb559a16c9ed..9e883a9f80388 100644
> --- a/fs/iomap/direct-io.c
> +++ b/fs/iomap/direct-io.c
> @@ -217,16 +217,10 @@ static inline blk_opf_t iomap_dio_bio_opflags(struct iomap_dio *dio,
>  {
>  	blk_opf_t opflags = REQ_SYNC | REQ_IDLE;
>  
> -	if (!(dio->flags & IOMAP_DIO_WRITE)) {
> -		WARN_ON_ONCE(iomap->flags & IOMAP_F_ZONE_APPEND);
> +	if (!(dio->flags & IOMAP_DIO_WRITE))
>  		return REQ_OP_READ;
> -	}
> -
> -	if (iomap->flags & IOMAP_F_ZONE_APPEND)
> -		opflags |= REQ_OP_ZONE_APPEND;
> -	else
> -		opflags |= REQ_OP_WRITE;
>  
> +	opflags |= REQ_OP_WRITE;
>  	if (use_fua)
>  		opflags |= REQ_FUA;
>  	else
> diff --git a/include/linux/iomap.h b/include/linux/iomap.h
> index 238a03087e17e..ee6d511ef29dd 100644
> --- a/include/linux/iomap.h
> +++ b/include/linux/iomap.h
> @@ -55,7 +55,6 @@ struct vm_fault;
>  #define IOMAP_F_SHARED		0x04
>  #define IOMAP_F_MERGED		0x08
>  #define IOMAP_F_BUFFER_HEAD	0x10
> -#define IOMAP_F_ZONE_APPEND	0x20
>  
>  /*
>   * Flags set by the core iomap code during operations:
> -- 
> 2.30.2
> 