linux-kernel - Re: [PATCH v8 03/20] dlb: add resource and device initialization

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Date:   Thu, 7 Jan 2021 20:40:24 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Mike Ximing Chen <mike.ximing.chen@...el.com>
Cc:     linux-kernel@...r.kernel.org, arnd@...db.de,
        dan.j.williams@...el.com, pierre-louis.bossart@...ux.intel.com,
        Gage Eads <gage.eads@...el.com>
Subject: Re: [PATCH v8 03/20] dlb: add resource and device initialization

On Mon, Jan 04, 2021 at 08:58:22PM -0600, Mike Ximing Chen wrote:
> Introduce dlb_bitmap_* functions, a thin convenience layer wrapping the
> Linux bitmap interfaces, used by the bitmaps in the dlb hardware types.

No, you created custom #defines:

> --- a/drivers/misc/dlb/dlb_hw_types.h
> +++ b/drivers/misc/dlb/dlb_hw_types.h
> @@ -5,6 +5,15 @@
>  #define __DLB_HW_TYPES_H
>  
>  #include <linux/io.h>
> +#include <linux/types.h>
> +
> +#include "dlb_bitmap.h"
> +
> +#define BITS_SET(x, val, mask)	(x = ((x) & ~(mask))     \
> +				 | (((val) << (mask##_LOC)) & (mask)))
> +#define BITS_CLR(x, mask)	((x) &= ~(mask))
> +#define BIT_SET(x, mask)        ((x) |= (mask))
> +#define BITS_GET(x, mask)       (((x) & (mask)) >> (mask##_LOC))

We have functions for this, use them, don't create custom macros for
them.  Use the Linux functions please.

thanks,

greg k-h