linux-kernel - Re: [PATCH v2 14/35] PCI: hv: switch hv_get_dom_num() to use atomic find

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Message-ID: <ZW1qcVWfjCvz0JRZ@liuwe-devbox-debian-v2>
Date:   Mon, 4 Dec 2023 05:58:09 +0000
From:   Wei Liu <wei.liu@...nel.org>
To:     Yury Norov <yury.norov@...il.com>
Cc:     linux-kernel@...r.kernel.org,
        "K. Y. Srinivasan" <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Wei Liu <wei.liu@...nel.org>, Dexuan Cui <decui@...rosoft.com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Rob Herring <robh@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        linux-hyperv@...r.kernel.org, linux-pci@...r.kernel.org,
        Jan Kara <jack@...e.cz>,
        Mirsad Todorovac <mirsad.todorovac@....unizg.hr>,
        Matthew Wilcox <willy@...radead.org>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Maxim Kuvyrkov <maxim.kuvyrkov@...aro.org>,
        Alexey Klimov <klimov.linux@...il.com>,
        Bart Van Assche <bvanassche@....org>,
        Sergey Shtylyov <s.shtylyov@....ru>,
        Michael Kelley <mhklinux@...look.com>
Subject: Re: [PATCH v2 14/35] PCI: hv: switch hv_get_dom_num() to use atomic
 find_bit()

On Sun, Dec 03, 2023 at 11:32:46AM -0800, Yury Norov wrote:
> The function traverses bitmap with for_each_clear_bit() just to allocate
> a bit atomically. We can do it better with a dedicated find_and_set_bit().
> 
> Signed-off-by: Yury Norov <yury.norov@...il.com>
> Reviewed-by: Michael Kelley <mhklinux@...look.com>

Acked-by: Wei Liu <wei.liu@...nel.org>