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Message-ID: <2014bcab0908110757q5b255dcdm497414d04810c281@mail.gmail.com>
Date:	Tue, 11 Aug 2009 23:57:31 +0900
From:	홍신 shin hong <hongshin@...il.com>
To:	netdev@...r.kernel.org
Subject: a question on net_device struct

Hi. I have a question while I read the codes in net/core of Linux 2.6.30.4.

'net_device' struct defined in include/linux/netdevice.h has a field
'operstate'.
Is a 'operstate' field is protected by 'dev_base_lock'?

At set_operstate() in net/core/rtnetlink.c, it seems that dev->operstate
is protected by write_lock_bh(&dev_base_lock).
But, in other codes, the read operations to dev->operstate are not
consistently protected by read_lock_bh(&dev_base_lock).

Thank you.

Sincerely
Shin Hong
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