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Linus Torvalds b6fd9e2594 arm: ioremap: don't abuse pfn_valid() to check if pfn is in RAM 
The semantics of pfn_valid() is to check presence of the memory map for a
 PFN and not whether a PFN is in RAM. The memory map may be present for a
 hole in the physical memory and if such hole corresponds to an MMIO range,
 __arm_ioremap_pfn_caller() will produce a WARN() and fail:
 
 Use memblock_is_map_memory() instead of pfn_valid() to check if a PFN is in
 RAM or not.
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Merge tag 'fixes-2021-07-09' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock

Pull memblock fix from Mike Rapoport:
 "This is a fix for the rework of ARM's pfn_valid() implementation
  merged during this merge window.

  Don't abuse pfn_valid() to check if pfn is in RAM

  The semantics of pfn_valid() is to check presence of the memory map
  for a PFN and not whether a PFN is in RAM. The memory map may be
  present for a hole in the physical memory and if such hole corresponds
  to an MMIO range, __arm_ioremap_pfn_caller() will produce a WARN() and
  fail.

  Use memblock_is_map_memory() instead of pfn_valid() to check if a PFN
  is in RAM or not"

* tag 'fixes-2021-07-09' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock:
  arm: ioremap: don't abuse pfn_valid() to check if pfn is in RAM
2021-07-10 09:17:13 -07:00
arch arm: ioremap: don't abuse pfn_valid() to check if pfn is in RAM 2021-07-10 09:17:13 -07:00
block block-5.14-2021-07-08 2021-07-09 12:05:33 -07:00
certs Kbuild updates for v5.13 (2nd) 2021-05-08 10:00:11 -07:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2021-07-09 11:00:44 -07:00
Documentation f2fs-for-5.14-rc1 2021-07-09 09:37:56 -07:00
drivers block-5.14-2021-07-08 2021-07-09 12:05:33 -07:00
fs io_uring-5.14-2021-07-09 2021-07-09 12:17:38 -07:00
include block-5.14-2021-07-08 2021-07-09 12:05:33 -07:00
init buildid: stash away kernels build ID on init 2021-07-08 11:48:22 -07:00
ipc Merge branch 'akpm' (patches from Andrew) 2021-07-02 12:08:10 -07:00
kernel Tracing fix for histograms and a clean up in ftrace 2021-07-09 11:15:09 -07:00
lib This pull request contains the following changes for UML: 2021-07-09 10:19:13 -07:00
LICENSES LICENSES: Add the CC-BY-4.0 license 2020-12-08 10:33:27 -07:00
mm Merge branch 'for-5.14-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu 2021-07-10 09:06:41 -07:00
net We have new filesystem client metrics for reporting I/O sizes from 2021-07-09 09:52:13 -07:00
samples VFIO update for v5.14-rc1 2021-07-03 11:49:33 -07:00
scripts scripts/decode_stacktrace.sh: indicate 'auto' can be used for base path 2021-07-08 11:48:22 -07:00
security asm-generic/unaligned: Unify asm/unaligned.h around struct helper 2021-07-02 12:43:40 -07:00
sound sound fixes for 5.14-rc1 2021-07-09 11:40:26 -07:00
tools Tracing fix for histograms and a clean up in ftrace 2021-07-09 11:15:09 -07:00
usr .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
virt Merge branch 'akpm' (patches from Andrew) 2021-06-29 17:29:11 -07:00
.clang-format clang-format: Update with the latest for_each macro list 2021-05-12 23:32:39 +02:00
.cocciconfig
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore .gitignore: ignore only top-level modules.builtin 2021-05-02 00:43:35 +09:00
.mailmap m68k updates for v5.14 2021-06-28 14:01:03 -07:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: move Murali Karicheri to credits 2021-04-29 15:47:30 -07:00
Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS f2fs-for-5.14-rc1 2021-07-09 09:37:56 -07:00
Makefile arm64 updates for 5.14 2021-06-28 14:04:24 -07:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

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.