linux-kernel - Re: [PATCH 0/9] Convert all to the caller hold lock version

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Date:	Mon, 20 May 2013 12:27:37 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Wang YanQing <udknight@...il.com>, jslaby@...e.cz,
	alan@...ux.intel.com, airlied@...hat.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/9] Convert all to the caller hold lock version

On Thu, May 09, 2013 at 02:13:04AM +0800, Wang YanQing wrote:
> After commit 50e244cc793d511b86adea24972f3a7264cae114 
>      (fb: rework locking to fix lock ordering on takeover)
> and 
>      commit e93a9a868792ad71cdd09d75e5a02d8067473c4e
>      (fb: Yet another band-aid for fixing lockdep mess)
> 
> We have two version functions implement almost the same function,
> except the caller/callee hold lock.
> 
> fbcon_takeover vs do_fbcon_takeover
> register_con_driver vs do_register_con_driver
> take_over_console vs do_take_over_console
> unbind_con_driver vs do_unbind_con_driver
> bind_con_driver vs do_bind_con_driver
> unregister_con_driver vs do_unregister_con_driver
> 
> This issue bring us much code duplication,
> like do_fbcon_takeover and fbcon_takeover,
> they have almost the same.
> 
> Although some of them had been re-written 
> as a wrapper for another, but the wrapper
> is so trivial, we can just throw them away.
> 
> Also those two versions of almost the same
> functions will confuse API's user.
> 
> After all, I think this issue is not good
> for long time maintain.
> 
> This series patch convert all to the
> new version which caller hold the lock,
> and then delete the old version away.

Can you also send a patch fixing up the documentation to use the new
functions as well?

thanks,

greg k-h
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