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SubjectRe: [PATCH 2/4] Convert epoll to a bitlock
On Mon,  2 Feb 2009 11:20:09 -0700
Jonathan Corbet <corbet@lwn.net> wrote:

> Matt Mackall suggested converting epoll's ep_lock to a bitlock as a way of
> saving space in struct file. This patch makes that change.

hrm. bit_spin_lock() makes people upset (large penguiny people). iirc
it doesn't have all the correct/well-understood memory/compiler
ordering semantics which spinlocks have. And lockdep doesn't know about
it.



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