linux-kernel - Re: [Patch] video: remove pointless comments in drivers/video/console/vgacon.c

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Date:	Wed, 19 Jan 2011 14:19:56 +0800
From:	Cong Wang <amwang@...hat.com>
To:	Paul Mundt <lethal@...ux-sh.org>
CC:	linux-kernel@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Yannick Heneault <yheneaul@...rox.com>,
	Matthew Garrett <mjg@...hat.com>, open@...ux-sh.org,
	"\"list@...ux-sh.org\"@zmta03.collab.prod.int.phx2.redhat.com:FRAMEBUFFER
	LAYER" <linux-fbdev@...r.kernel.org>
Subject: Re: [Patch] video: remove pointless comments in drivers/video/console/vgacon.c

于 2011年01月19日 14:15, Paul Mundt 写道:
> On Wed, Jan 19, 2011 at 02:08:22PM +0800, Cong Wang wrote:
>> ??? 2011???01???19??? 14:02, Paul Mundt ??????:
>>> On Wed, Jan 19, 2011 at 02:00:02PM +0800, Amerigo Wang wrote:
>>>> Now vgacon_scrollback_startup() uses slab, not bootmem,
>>>> so that comment is obsolete, the rest are useless.
>>>>
>>>> Signed-off-by: WANG Cong<amwang@...hat.com>
>>>>
>>> If you're going to do this then at least follow through and do the rest
>>> of it. The comment is no longer applicable, but then neither is the
>>> __init_refok annotation. Killing off the comment explaining why something
>>> is (or was there) without killing off the thing that is referenced by the
>>> comment is not terribly productive.
>>
>> Isn't __init_refok already a clear sign of "silence modpost"?
>> Why need to comment it again?
>
> __init_refok was to silence what was presumably an alloc_bootmem()
> reference at the time that the slab allocations were not early enough to
> satisfy the allocation, necessitating the use of bootmem. Since kmalloc
> and friends became usable early enough and the bootmem allocation has
> subsequently been dropped, there's no longer any need for the annotation.
>
> ie, alloc_bootmem() itself is __init while vgacon_scrollback_startup() is
> not, hence the modpost complaint.

Ah, I see, will remove '__init_refok' as well.

Thanks!
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