linux-kernel - Re: [PATCH 1/3] usbhid: Driver for microsoft natural ergonomic keyboard 4000

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Message-ID: <44C80D3E.5090706@ccoss.com.cn>
Date:	Thu, 27 Jul 2006 08:47:58 +0800
From:	liyu <liyu@...ss.com.cn>
To:	Josef Sipek <jsipek@....cs.sunysb.edu>
CC:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/3] usbhid: Driver for microsoft natural ergonomic keyboard
 4000

Josef Sipek wrote:
> +#define map_key(c) \
> +       do { \
> +               usage->code = c; \
> +               usage->type = EV_KEY; \
> +               set_bit(c,input->keybit); \
> +       } while (0)
>
> I'm not quite sure where usage is coming from. Some magical global variable?
> Eeek.
>
> Josef "Jeff" Sipek.
>
>   
These macroes like map_key() only use in nek4k_setup_usage() and
ne4k_clear_usage(), so the
variable "usage" is coming from their parameter.

PS: these macroes are modifed from hid-input.c

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