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Mike Kravetz
4ddb4d91b8
As an optimization for loops sequentially processing hugetlb address ranges, huge_pmd_unshare would update a passed address if it unshared a pmd. Updating a loop control variable outside the loop like this is generally a bad idea. These loops are now using hugetlb_mask_last_page to optimize scanning when non-present ptes are discovered. The same can be done when huge_pmd_unshare returns 1 indicating a pmd was unshared. Remove address update from huge_pmd_unshare. Change the passed argument type and update all callers. In loops sequentially processing addresses use hugetlb_mask_last_page to update address if pmd is unshared. [[email protected]: fix an unused variable warning/error] Link: https://lkml.kernel.org/r/[email protected] Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Mike Kravetz <[email protected]> Signed-off-by: Stephen Rothwell <[email protected]> Acked-by: Muchun Song <[email protected]> Reviewed-by: Baolin Wang <[email protected]> Cc: "Aneesh Kumar K.V" <[email protected]> Cc: Anshuman Khandual <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Christian Borntraeger <[email protected]> Cc: David Hildenbrand <[email protected]> Cc: James Houghton <[email protected]> Cc: kernel test robot <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Mina Almasry <[email protected]> Cc: Naoya Horiguchi <[email protected]> Cc: Paul Walmsley <[email protected]> Cc: Peter Xu <[email protected]> Cc: Rolf Eike Beer <[email protected]> Cc: Will Deacon <[email protected]> Cc: Stephen Rothwell <[email protected]> Signed-off-by: Andrew Morton <[email protected]>
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.