0a8afd9f02
Now we have a separate path for sock_def_write_space() and can go one step further. When it's called from sock_wfree() we know that there is a preceding atomic for putting down ->sk_wmem_alloc. We can use it to replace to replace smb_mb() with a less expensive smp_mb__after_atomic(). It also removes an extra RCU read lock/unlock as a small bonus. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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.