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Alexandre Ghiti <alexghiti@rivosinc.com> says: This series is a follow-up for riscv of a recent series from Ryan [1] which converts all direct dereferences of pte_t into a ptet_get() access. The goal here for riscv is to use READ_ONCE()/WRITE_ONCE() for all page table entries accesses to avoid any compiler transformation when the hardware can concurrently modify the page tables entries (A/D bits for example). I went a bit further and added pud/p4d/pgd_get() helpers as such concurrent modifications can happen too at those levels. [1] https://lore.kernel.org/all/20230612151545.3317766-1-ryan.roberts@arm.com/ * b4-shazam-merge: riscv: Use accessors to page table entries instead of direct dereference riscv: mm: Only compile pgtable.c if MMU mm: Introduce pudp/p4dp/pgdp_get() functions riscv: Use WRITE_ONCE() when setting page table entries Link: https://lore.kernel.org/r/20231213203001.179237-1-alexghiti@rivosinc.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
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.