Re: [PATCH] Fix read-only superblock in case of subvol RO remount

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To: Goldwyn Rodrigues <rgoldwyn@xxxxxxx>
Subject: Re: [PATCH] Fix read-only superblock in case of subvol RO remount
From: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Date: Thu, 10 Feb 2022 19:27:43 +0000
Cc: linux-btrfs@xxxxxxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, dhowells@xxxxxxxxxx, fvogt@xxxxxxxx
In-reply-to: <20220210165142.7zfgotun5qdtx4rq@fiona>

On Thu, Feb 10, 2022 at 10:51:42AM -0600, Goldwyn Rodrigues wrote:
>  	WRITE_ONCE(sb->s_flags, ((sb->s_flags & ~fc->sb_flags_mask) |
> -				 (fc->sb_flags & fc->sb_flags_mask)));
> +				 (sb->s_flags & fc->sb_flags_mask)));
> +

what?

(a & ~b) | (a & b) == a, no?

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  - From: Goldwyn Rodrigues

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