mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-05-14 06:30:20 -04:00
20c9ccffcc
__maps__fixup_overlap_and_insert may split or directly insert a map, when doing this the map may need to have a kmap set up for the sake of the kmaps. The missing kmap set up fails the check_invariants test in maps, later "Internal error" reports from map__kmap and ultimately causes segfaults. Similar fixes were added in commite0e4e0b8b7("perf maps: Add missing map__set_kmap_maps() when replacing a kernel map") and commit25d9c0301d("perf maps: Set the kmaps for newly created/added kernel maps") but they missed cases. To try to reduce the risk of this, update the kmap directly following any manual insert. This identified another problem in maps__copy_from. Fixes:e0e4e0b8b7("perf maps: Add missing map__set_kmap_maps() when replacing a kernel map") Fixes:25d9c0301d("perf maps: Set the kmaps for newly created/added kernel maps") Signed-off-by: Ian Rogers <irogers@google.com> Signed-off-by: Namhyung Kim <namhyung@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 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.