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OpenRISC only supports hardware instructions that perform 4 byte atomic operations. For enabling qrwlocks for upcoming SMP support 1 and 2 byte implementations are needed. To do this we leverage the 4 byte atomic operations and shift/mask the 1 and 2 byte areas as needed. This heavily borrows ideas and routines from sh and mips, which do something similar. Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Stafford Horne <shorne@gmail.com> |
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| README | ||
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. 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.