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Date:	Fri, 12 Oct 2012 23:33:24 +0800
From:	Ming Lei <>
To:	Oliver Neukum <>
Cc:	Alan Stern <>,
	"David S. Miller" <>,
	Greg Kroah-Hartman <>,,,
Subject: Re: [PATCH 01/12] usbnet: introduce usbnet 3 command helpers

On Fri, Oct 12, 2012 at 11:17 PM, Ming Lei <> wrote:

> Suppose mutex_lock(A) is called in pre_reset(), one solution is that
> always calling tsk_set_allowd_gfp(~GFP_IOFS) before each mutex_lock(A).
> We can do it only for devices with storage interface in current
> configuration.

The problem will become quite complicated if a 3rd, even 4th,... context
is involved in the task dependency.

But I am wondering if there are such practical examples wrt. usb
mass storage.

Ming Lei
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