tree 12a7142ffa81a65da204384dfa26365d30803735
parent 914dcaa84c53f2c3efa6016efcae13fd92a8a17c
author Rusty Russell <rusty@rustcorp.com.au> 1281589459 -0600
committer Rusty Russell <rusty@rustcorp.com.au> 1281533660 +0930

param: locking for kernel parameters

There may be cases (most obviously, sysfs-writable charp parameters) where
a module needs to prevent sysfs access to parameters.

Rather than express this in terms of a big lock, the functions are
expressed in terms of what they protect against.  This is clearer, esp.
if the implementation changes to a module-level or even param-level lock.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Tested-by: Phil Carmody <ext-phil.2.carmody@nokia.com>