Directory “/proc/sys/net/bridge” missing

[Martinx - ジェームズ]

Guys,

 I upgraded my Trusty to Linux 3.19 (package: linux-generic-lts-vivid) and
the directory "/proc/sys/net/bridge" disappeared.

 What's going on?

 My bridge exist, I can see it through "brctl show" but, where is the
directory under /proc? If I return to Linux 3.13, the
"/proc/sys/net/bridge" appears again.

 What am I missing?

 AskUbuntu:
https://askubuntu.com/questions/645638/directory-proc-sys-net-bridge-missing

Thanks!
Thiago
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