linux-kernel - Re: [PATCH] PCI: iproc: Use the bitmap API to allocate bitmaps

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Message-ID: <745e96ba-0632-141e-ae11-a59c00f63ab7@broadcom.com>
Date:   Mon, 4 Jul 2022 10:28:10 -0700
From:   Ray Jui <ray.jui@...adcom.com>
To:     Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        Broadcom internal kernel review list 
        <bcm-kernel-feedback-list@...adcom.com>
Cc:     linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        linux-pci@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] PCI: iproc: Use the bitmap API to allocate bitmaps



On 7/4/2022 6:15 AM, Christophe JAILLET wrote:
> Use bitmap_zalloc()/bitmap_free() instead of hand-writing them.
> 
> It is less verbose and it improves the semantic.
> 
> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
> ---
>  drivers/pci/controller/pcie-iproc-msi.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/pci/controller/pcie-iproc-msi.c b/drivers/pci/controller/pcie-iproc-msi.c
> index 757b7fbcdc59..fee036b07cd4 100644
> --- a/drivers/pci/controller/pcie-iproc-msi.c
> +++ b/drivers/pci/controller/pcie-iproc-msi.c
> @@ -589,8 +589,8 @@ int iproc_msi_init(struct iproc_pcie *pcie, struct device_node *node)
>  		msi->has_inten_reg = true;
>  
>  	msi->nr_msi_vecs = msi->nr_irqs * EQ_LEN;
> -	msi->bitmap = devm_kcalloc(pcie->dev, BITS_TO_LONGS(msi->nr_msi_vecs),
> -				   sizeof(*msi->bitmap), GFP_KERNEL);
> +	msi->bitmap = devm_bitmap_zalloc(pcie->dev, msi->nr_msi_vecs,
> +					 GFP_KERNEL);
>  	if (!msi->bitmap)
>  		return -ENOMEM;
>  

Improvement looks fine to me. Thanks.

Acked-by: Ray Jui <ray.jui@...adcom.com>

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