linux-kernel - Re: [PATCH v3 6/6] sparc/leon: Remove on-stack cpumask var

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Date: Tue, 23 Apr 2024 19:29:43 +0200
From: Sam Ravnborg <sam@...nborg.org>
To: Dawei Li <dawei.li@...ngroup.cn>
Cc: davem@...emloft.net, andreas@...sler.com, sparclinux@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 6/6] sparc/leon: Remove on-stack cpumask var

On Tue, Apr 23, 2024 at 04:30:43PM +0800, Dawei Li wrote:
> In general it's preferable to avoid placing cpumasks on the stack, as
> for large values of NR_CPUS these can consume significant amounts of
> stack space and make stack overflows more likely.
> 
> Use cpumask_subset() and cpumask_first_and() to avoid the need for a
> temporary cpumask on the stack.
> 
> Signed-off-by: Dawei Li <dawei.li@...ngroup.cn>
Looks fine.

Reviewed-by: Sam Ravnborg <sam@...nborg.org>