netdev - Re: [PATCH v5 2/4] vdpa: Allow for printing negotiated features of a device

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Date:   Wed, 9 Mar 2022 21:58:03 -0700
From:   David Ahern <dsahern@...nel.org>
To:     Eli Cohen <elic@...dia.com>, stephen@...workplumber.org,
        netdev@...r.kernel.org, virtualization@...ts.linux-foundation.org,
        jasowang@...hat.com, si-wei.liu@...cle.com
Cc:     mst@...hat.com, lulu@...hat.com, parav@...dia.com
Subject: Re: [PATCH v5 2/4] vdpa: Allow for printing negotiated features of a
 device

On 3/9/22 9:46 AM, Eli Cohen wrote:
> +static void print_features(struct vdpa *vdpa, uint64_t features, bool mgmtdevf,
> +			   uint16_t dev_id)
> +{
> +	const char * const *feature_strs = NULL;
> +	const char *s;
> +	int i;
> +
> +	if (dev_id < ARRAY_SIZE(dev_to_feature_str))
> +		feature_strs = dev_to_feature_str[dev_id];
> +
> +	if (mgmtdevf)
> +		pr_out_array_start(vdpa, "dev_features");
> +	else
> +		pr_out_array_start(vdpa, "negotiated_features");
> +
> +	for (i = 0; i < 64; i++) {

make that 64 a macro so the magic number has a description. e.g.,

#define BITS_PER_U64 (sizeof(u64) * 8)