linux-stable/net/x25/Kconfig
Arnd Bergmann 6de5bd128d BKL: introduce CONFIG_BKL.
With all the patches we have queued in the BKL removal tree, only a
few dozen modules are left that actually rely on the BKL, and even
there are lots of low-hanging fruit. We need to decide what to do
about them, this patch illustrates one of the options:

Every user of the BKL is marked as 'depends on BKL' in Kconfig,
and the CONFIG_BKL becomes a user-visible option. If it gets
disabled, no BKL using module can be built any more and the BKL
code itself is compiled out.

The one exception is file locking, which is practically always
enabled and does a 'select BKL' instead. This effectively forces
CONFIG_BKL to be enabled until we have solved the fs/lockd
mess and can apply the patch that removes the BKL from fs/locks.c.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2010-10-21 15:44:13 +02:00

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1.6 KiB
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#
# CCITT X.25 Packet Layer
#
config X25
tristate "CCITT X.25 Packet Layer (EXPERIMENTAL)"
depends on EXPERIMENTAL
depends on BKL # should be fixable
---help---
X.25 is a set of standardized network protocols, similar in scope to
frame relay; the one physical line from your box to the X.25 network
entry point can carry several logical point-to-point connections
(called "virtual circuits") to other computers connected to the X.25
network. Governments, banks, and other organizations tend to use it
to connect to each other or to form Wide Area Networks (WANs). Many
countries have public X.25 networks. X.25 consists of two
protocols: the higher level Packet Layer Protocol (PLP) (say Y here
if you want that) and the lower level data link layer protocol LAPB
(say Y to "LAPB Data Link Driver" below if you want that).
You can read more about X.25 at <http://www.sangoma.com/x25.htm> and
<http://www.cisco.com/univercd/cc/td/doc/product/software/ios11/cbook/cx25.htm>.
Information about X.25 for Linux is contained in the files
<file:Documentation/networking/x25.txt> and
<file:Documentation/networking/x25-iface.txt>.
One connects to an X.25 network either with a dedicated network card
using the X.21 protocol (not yet supported by Linux) or one can do
X.25 over a standard telephone line using an ordinary modem (say Y
to "X.25 async driver" below) or over Ethernet using an ordinary
Ethernet card and the LAPB over Ethernet (say Y to "LAPB Data Link
Driver" and "LAPB over Ethernet driver" below).
To compile this driver as a module, choose M here: the module
will be called x25. If unsure, say N.