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KCSAN reports a data race on mm_cluster.hiwater_rss, which can be accessed concurrently from various paths like page migration and memory unmapping without synchronization. Since hiwater_rss is a statistical field for accounting purposes, this data race is benign. Annotate both the read and write accesses with data_race() to make KCSAN happy. Link: https://lkml.kernel.org/r/20250926092426.43312-1-lance.yang@linux.dev Signed-off-by: Lance Yang <lance.yang@linux.dev> Reported-by: syzbot+60192c8877d0bc92a92b@syzkaller.appspotmail.com Closes: https://lore.kernel.org/linux-mm/68d6364e.050a0220.3390a8.000d.GAE@google.com Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: David Hildenbrand <david@redhat.com> Cc: Jann Horn <jannh@google.com> Cc: Liam Howlett <liam.howlett@oracle.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Marco Elver <elver@google.com> Cc: Rik van Riel <riel@surriel.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.