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6477c3886a
pte_mkdirty() creates dirty states both in SW and HW bits, which is really not required, either in pte_wrprotect() or pte_modify() for preserving the HW dirty state. Because pte_mkdirty() sets PTE_DIRTY and clears PTE_RDONLY as pte_write() always evaluates to be true - otherwise pte_hw_dirty() will not test out in the first place. Clearing PTE_RDONLY again is not required here because the pte is already in pte_hw_dirty() but might soon loose its dirty state thus requiring preservation in SW dirty bit i.e PTE_DIRTY. Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Reviewed-by: David Hildenbrand <david@redhat.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Link: https://lore.kernel.org/r/20230713071518.628440-1-anshuman.khandual@arm.com Signed-off-by: Will Deacon <will@kernel.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.