linux-kernel - Re: [PATCH 04/14] ubi: fastmap: Add UBI_FM_SB_PRESEEDED

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Message-ID: <20180624145350.11231190@bbrezillon>
Date:   Sun, 24 Jun 2018 14:53:50 +0200
From:   Boris Brezillon <boris.brezillon@...tlin.com>
To:     Richard Weinberger <richard@....at>
Cc:     linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 04/14] ubi: fastmap: Add UBI_FM_SB_PRESEEDED_FLG flag

On Wed, 13 Jun 2018 23:23:34 +0200
Richard Weinberger <richard@....at> wrote:

> This flag indicates that the fastmap was preseeded, which means
> it was created offline by a tool such as ubinize which cannot know
> the whole MTD state such as real size and bad blocks.
> As consequence UBI has to take special care to use that fastmap.
> 
> Signed-off-by: Richard Weinberger <richard@....at>
> ---
>  drivers/mtd/ubi/ubi-media.h | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/mtd/ubi/ubi-media.h b/drivers/mtd/ubi/ubi-media.h
> index 6136a97f4844..be339fb924af 100644
> --- a/drivers/mtd/ubi/ubi-media.h
> +++ b/drivers/mtd/ubi/ubi-media.h
> @@ -390,7 +390,11 @@ struct ubi_vtbl_record {
>  #define UBI_FM_MIN_POOL_SIZE	8
>  #define UBI_FM_MAX_POOL_SIZE	256
>  
> -#define UBI_FM_SB_FLG_MASK	0
> +enum {
> +	UBI_FM_SB_PRESEEDED_FLG	= 0x1,
> +};
> +
> +#define UBI_FM_SB_FLG_MASK (UBI_FM_SB_PRESEEDED_FLG)

You update the def that you use to check when a flag is supported,
still, you do not support this feature yet. Better move this line after
the support is really functional, don't you think?