fcntl spinlock in Linux?

[Volker Lendecke]

On Thu, Jan 24, 2013 at 02:05:00PM +0100, Stefan (metze) Metzmacher wrote:
> Reading through
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=blob;f=Documentation/DocBook/kernel-locking.tmpl
> indicates to me that this could be solved using RCU to protect the
> global lock list.

From that link:

523         Avoid holding spinlock for more than 5 lines of code and
524         across any function call (except accessors like
525         <function>readb</function>).

Well, to me this looks not strictly followed in this
case....

Volker

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