6c54312f96
It was pointed out[1] that using folio_test_hwpoison() is wrong as we need to check the indiviual page that has poison. folio_test_hwpoison() only checks the head page so go back to using PageHWPoison(). User-visible effects include existing hwpoison-inject tests possibly failing as unpoisoning a single subpage could lead to unpoisoning an entire folio. Memory unpoisoning could also not work as expected as the function will break early due to only checking the head page and not the actually poisoned subpage. [1]: https://lore.kernel.org/lkml/ZLIbZygG7LqSI9xe@casper.infradead.org/ Link: https://lkml.kernel.org/r/20230717181812.167757-1-sidhartha.kumar@oracle.com Fixes: a6fddef49eef ("mm/memory-failure: convert unpoison_memory() to folios") Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com> Reported-by: Matthew Wilcox (Oracle) <willy@infradead.org> Acked-by: Naoya Horiguchi <naoya.horiguchi@nec.com> Reviewed-by: Miaohe Lin <linmiaohe@huawei.com> Cc: <stable@vger.kernel.org> 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 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.