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7e3811521d
The RISC-V kernel needs a sfence.vma after a page table modification: we used to rely on the vmalloc fault handling to emit an sfence.vma, but commit7d3332be01("riscv: mm: Pre-allocate PGD entries for vmalloc/modules area") got rid of this path for 64-bit kernels, so now we need to explicitly emit a sfence.vma in flush_cache_vmap(). Note that we don't need to implement flush_cache_vunmap() as the generic code should emit a flush tlb after unmapping a vmalloc region. Fixes:7d3332be01("riscv: mm: Pre-allocate PGD entries for vmalloc/modules area") Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com> Link: https://lore.kernel.org/r/20230725132246.817726-1-alexghiti@rivosinc.com Cc: stable@vger.kernel.org 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.