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The current retry logic, to wait when a 'dying' object is found, spans multiple functions. The process is attached to a waitqueue and set TASK_UNINTERRUPTIBLE in htable_lookup, and this status is passed back through lu_object_find_try() to lu_object_find_at() where schedule() is called and the process is removed from the queue. This can be simplified by moving all the logic (including hashtable locking) inside htable_lookup(), which now never returns EAGAIN. Note that htable_lookup() is called with the hash bucket lock held, and will drop and retake it if it needs to schedule. I made this a 'goto' loop rather than a 'while(1)' loop as the diff is easier to read. Signed-off-by: NeilBrown <neilb@suse.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.