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99edea3005
We've already found the VMA within madvise_walk_vmas() before calling specific madvise behavior functions like madvise_free_single_vma(). So calling walk_page_range() and doing find_vma() again seems unnecessary. It also prevents potential optimizations in those madvise callbacks, particularly the use of dedicated per-VMA locking. [v-songbaohua@oppo.com: revert the walk_page_range_vma change for MADV_GUARD_INSTALL] Link: https://lkml.kernel.org/r/20250609105513.10901-1-21cnbao@gmail.com Link: https://lkml.kernel.org/r/20250605083144.43046-1-21cnbao@gmail.com Signed-off-by: Barry Song <v-songbaohua@oppo.com> Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com> Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Acked-by: David Hildenbrand <david@redhat.com> Reviewed-by: Oscar Salvador <osalvador@suse.de> Reviewed-by: Harry Yoo <harry.yoo@oracle.com> Reviewed-by: Dev Jain <dev.jain@arm.com> Reviewed-by: Vlastimil Babka <vbabka@suse.cz> Reviewed-by: Ryan Roberts <ryan.roberts@arm.com> Tested-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: "Liam R. Howlett" <Liam.Howlett@oracle.com> Cc: Jann Horn <jannh@google.com> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Lokesh Gidra <lokeshgidra@google.com> Cc: Tangquan Zheng <zhengtangquan@oppo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.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 reStructuredText 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.