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Filename Latest commit message Latest commit date
Muchun Song 662b70a45b dax: fix cache flush on PMD-mapped pages 
[ Upstream commit e583b5c472bd23d450e06f148dc1f37be74f7666 ]

The flush_cache_page() only remove a PAGE_SIZE sized range from the cache.
However, it does not cover the full pages in a THP except a head page.
Replace it with flush_cache_range() to fix this issue.  This is just a
documentation issue with the respect to properly documenting the expected
usage of cache flushing before modifying the pmd.  However, in practice
this is not a problem due to the fact that DAX is not available on
architectures with virtually indexed caches per:

  commit d92576f116 ("dax: does not work correctly with virtual aliasing caches")

Link: https://lkml.kernel.org/r/20220403053957.10770-3-songmuchun@bytedance.com
Fixes: f729c8c9b2 ("dax: wrprotect pmd_t in dax_mapping_entry_mkclean")
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Hugh Dickins <hughd@google.com>
Cc: Jan Kara <jack@suse.cz>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: Ross Zwisler <zwisler@kernel.org>
Cc: Xiongchun Duan <duanxiongchun@bytedance.com>
Cc: Xiyu Yang <xiyuyang19@fudan.edu.cn>
Cc: Yang Shi <shy828301@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-06-14 18:11:41 +02:00
arch powerpc/fadump: fix PT_LOAD segment for boot memory area 2022-06-14 18:11:40 +02:00
block
certs
crypto crypto: ecrdsa - Fix incorrect use of vli_cmp 2022-06-06 08:33:50 +02:00
Documentation hwmon: Make chip parameter for with_info API mandatory 2022-06-14 18:11:29 +02:00
drivers drivers/base/node.c: fix compaction sysfs file leak 2022-06-14 18:11:41 +02:00
fs dax: fix cache flush on PMD-mapped pages 2022-06-14 18:11:41 +02:00
include scsi: fcoe: Fix Wstringop-overflow warnings in fcoe_wwn_from_mac() 2022-06-14 18:11:40 +02:00
init
ipc
kernel sched/fair: Fix cfs_rq_clock_pelt() for throttled cfs_rq 2022-06-14 18:11:33 +02:00
lib assoc_array: Fix BUG_ON during garbage collect 2022-06-06 08:33:50 +02:00
LICENSES
mm zsmalloc: fix races between asynchronous zspage free and page migration 2022-06-06 08:33:50 +02:00
net net/smc: postpone sk_refcnt increment in connect() 2022-06-14 18:11:39 +02:00
samples
scripts scripts/faddr2line: Fix overlapping text section failures 2022-06-14 18:11:37 +02:00
security lockdown: also lock down previous kgdb use 2022-06-06 08:33:48 +02:00
sound ASoC: wm2000: fix missing clk_disable_unprepare() on error in wm2000_anc_transition() 2022-06-14 18:11:38 +02:00
tools perf tools: Add missing headers needed by util/data.h 2022-06-14 18:11:34 +02:00
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virt
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Makefile Linux 5.4.197 2022-06-06 08:33:51 +02:00
README

README 

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.