040e123c0b
Rearrange the allocation of the mm_struct registration to avoid allocating underneath the i915->mm_lock, so that we avoid tainting the lock (and in turn many other locks that may be held as i915->mm_lock is taken, and those locks we may want on the free [shrinker] paths). In doing so, we convert the lookup to be RCU protected by courtesy of converting the free-worker to be an rcu_work. v2: Remember to use hash_rcu variants to protect the list iteration from concurrent add/del. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200619194038.5088-1-chris@chris-wilson.co.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.