net: Remove BKL from tun
authorThomas Gleixner <tglx@linutronix.de>
Wed, 14 Oct 2009 08:19:46 +0000 (01:19 -0700)
committerDavid S. Miller <davem@davemloft.net>
Wed, 14 Oct 2009 08:19:46 +0000 (01:19 -0700)
commitdeed49fbb68d7d07ec6c3dfd06bffc74e9abc6fa
treee9cb9de1f67f7cdd47f57237b4fa6c1d51ab9941
parent421355de876b9f3fcc7e4cb6026e416fb12a5068
net: Remove BKL from tun

The lock_kernel/unlock_kernel() in cycle_kernel_lock() which is called
in tun_chr_open() is not serializing against anything and safe to
remove.

tun_chr_fasync() is serialized by get/put_tun() and fasync_helper()
has no dependency on BKL. The modification of tun->flags is racy with
and without the BKL so removing it does not make it worse.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/tun.c