linux-kernel - Re: [PATCH v2 05/14] mm/ksm: use folio in stable_node

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Date: Fri, 22 Mar 2024 15:57:36 +0000
From: Matthew Wilcox <willy@...radead.org>
To: alexs@...nel.org
Cc: Andrea Arcangeli <aarcange@...hat.com>,
	Izik Eidus <izik.eidus@...ellosystems.com>, david@...hat.com,
	Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, Hugh Dickins <hughd@...gle.com>,
	Chris Wright <chrisw@...s-sol.org>
Subject: Re: [PATCH v2 05/14] mm/ksm: use folio in stable_node_dup

On Fri, Mar 22, 2024 at 04:36:52PM +0800, alexs@...nel.org wrote:
> -static struct page *stable_node_dup(struct ksm_stable_node **_stable_node_dup,
> -				    struct ksm_stable_node **_stable_node,
> -				    struct rb_root *root,
> -				    bool prune_stale_stable_nodes)
> +static void *stable_node_dup(struct ksm_stable_node **_stable_node_dup,
> +			     struct ksm_stable_node **_stable_node,
> +			     struct rb_root *root,
> +			     bool prune_stale_stable_nodes)

Do we really have to go through this void * stage?

Also, please stop reindenting the arguments.  I tend to just switch to
two tabs, but lining them up with the opening bracket leads to extra
churn.  Either leave them alone for the entire series or switch _once_.