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Tue, 23 Apr 2024 17:29:52 +0000 (UTC) Date: Tue, 23 Apr 2024 19:29:43 +0200 From: Sam Ravnborg To: Dawei Li Cc: davem@davemloft.net, andreas@gaisler.com, sparclinux@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v3 6/6] sparc/leon: Remove on-stack cpumask var Message-ID: <20240423172943.GA903763@ravnborg.org> References: <20240423083043.3735921-1-dawei.li@shingroup.cn> <20240423083043.3735921-7-dawei.li@shingroup.cn> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240423083043.3735921-7-dawei.li@shingroup.cn> 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 Looks fine. Reviewed-by: Sam Ravnborg