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5d9176edac
Improves PIO transmission: - Replaces the FIFO filling per character by a filling per blocks of characters, which provides better performances - Replaces the active waiting loop by TX empty interrupt dynamic handling. TXE interrupt is now enabled when data has to be sent (ie when uart_circ is not empty), and inhibited when there is no more data to send (ie when uart_circ is empty). Signed-off-by: Erwan Le Ray <erwan.leray@st.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.
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.