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85353e919f
We do need ep->mtx (and we are holding it all along), but that's the lock on the epoll we are inserting into; locking of the epoll being inserted is not needed for most of that work - as the matter of fact, we only need it to provide barriers for the fastpath check (for now). Move taking and releasing it into ep_insert(). The caller (do_epoll_ctl()) doesn't need to bother with that at all. Moreover, that way we kill the kludge in ep_item_poll() - now it's always called with tep unlocked. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.