6c63ef8001
TLB operations only need to be serialized on machines with the Merced (Stretch) bus. The only machines in this category are L and N class, and they require a 64-bit PA 2.0 kernel. On these machines, we use local TLB purges in the tmpalias routines. We don't need to serialize TLB purges on all other machines. Thus, the lock/unlock code can be removed when CONFIG_PA20 is not defined. Further, when CONFIG_PA20 is not defined, alternative patching converts the TLB purges to local purges when PA 2.0 hardware has been detected. Signed-off-by: John David Anglin <dave.anglin@bell.net> Tested-By: Sven Schnelle <svens@stackframe.org> Signed-off-by: Helge Deller <deller@gmx.de>
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.