linux-kernel - Re: [PATCH] btrfs: memset cur_trans->delayed

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Message-ID: <20150907140122.GX11834@suse.cz>
Date:	Mon, 7 Sep 2015 16:01:22 +0200
From:	David Sterba <dsterba@...e.cz>
To:	Alexandru Moise <00moses.alexander00@...il.com>
Cc:	clm@...com, jbacik@...com, linux-btrfs@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] btrfs: memset cur_trans->delayed_refs to zero

So, updated patches should mention that in the subject eg:

[PATCH v2] btrfs: memset cur_trans->delayed_refs to zero

On Mon, Sep 07, 2015 at 04:45:02PM +0300, Alexandru Moise wrote:
> Use memset() to null out the btrfs_delayed_ref_root of
> btrfs_transaction instead of setting all the members to 0 by hand.
> 
> Signed-off-by: Alexandru Moise <00moses.alexander00@...il.com>
> ---

And in this section (ie. after the first ---) put a brief description of
the changes.

>  fs/btrfs/transaction.c | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
> index 8f259b3..0581fb4 100644
> --- a/fs/btrfs/transaction.c
> +++ b/fs/btrfs/transaction.c
> @@ -224,15 +224,15 @@ loop:
>  	cur_trans->start_time = get_seconds();
>  	cur_trans->dirty_bg_run = 0;
>  
> +	memset(&cur_trans->delayed_refs, 0, sizeof(cur_trans->delayed_refs));
> +
> +	/*
> +	 * For now RB_ROOT means set to NULL but this could change in
> +	 * the future
> +	 */

I don't think such comment necessary, the code is clear enough without
it.

>  	cur_trans->delayed_refs.href_root = RB_ROOT;
>  	cur_trans->delayed_refs.dirty_extent_root = RB_ROOT;

.
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