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authorJonathan Corbet <corbet@lwn.net>2008-05-18 14:27:41 -0600
committerJonathan Corbet <corbet@lwn.net>2008-06-20 14:05:53 -0600
commit0b2806768899dba5967bcd4a3b93eaed9a1dc4f3 (patch)
treec9e7762d9b236883f4a23a170919317a6e7c93c7 /drivers
parent6606470dd1d628878383c96d10b52a77986ddac7 (diff)
Add cycle_kernel_lock()
A number of driver functions are so obviously trivial that they do not need the big kernel lock - at least not overtly. It turns out that the acquisition of the BKL in driver open() functions can perform a sort of poor-hacker's serialization function, delaying the open operation until the driver is certain to have completed its initialization. Add a simple cycle_kernel_lock() function for these cases to make it clear that there is no need to *hold* the BKL, just to be sure that we can acquire it. Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'drivers')
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