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

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Date:   Tue, 12 Jul 2022 14:41:21 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Christophe JAILLET <christophe.jaillet@...adoo.fr>
Cc:     Jingoo Han <jingoohan1@...il.com>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        linux-pci@...r.kernel.org,
        Serge Semin <Sergey.Semin@...kalelectronics.ru>
Subject: Re: [PATCH] PCI: dwc: Use the bitmap API to allocate bitmaps

[+cc Serge]

On Sat, Jul 09, 2022 at 04:10:52PM +0200, Christophe JAILLET wrote:
> Use devm_bitmap_zalloc() instead of hand-writing them.
> 
> It is less verbose and it improves the semantic.
> 
> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>

Applied to pci/ctrl/dwc for v5.20, thanks!

> ---
>  drivers/pci/controller/dwc/pcie-designware-ep.c | 12 ++++--------
>  1 file changed, 4 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c
> index fb887495f53e..ad54aaa71a02 100644
> --- a/drivers/pci/controller/dwc/pcie-designware-ep.c
> +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c
> @@ -721,17 +721,13 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
>  	ep->phys_base = res->start;
>  	ep->addr_size = resource_size(res);
>  
> -	ep->ib_window_map = devm_kcalloc(dev,
> -					 BITS_TO_LONGS(pci->num_ib_windows),
> -					 sizeof(long),
> -					 GFP_KERNEL);
> +	ep->ib_window_map = devm_bitmap_zalloc(dev, pci->num_ib_windows,
> +					       GFP_KERNEL);
>  	if (!ep->ib_window_map)
>  		return -ENOMEM;
>  
> -	ep->ob_window_map = devm_kcalloc(dev,
> -					 BITS_TO_LONGS(pci->num_ob_windows),
> -					 sizeof(long),
> -					 GFP_KERNEL);
> +	ep->ob_window_map = devm_bitmap_zalloc(dev, pci->num_ob_windows,
> +					       GFP_KERNEL);
>  	if (!ep->ob_window_map)
>  		return -ENOMEM;
>  
> -- 
> 2.34.1
>