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Christophe Leroy da5a7fbfc5 btrfs: disable build on platforms having page size 256K 
[ Upstream commit b05fbcc36b ]

With a config having PAGE_SIZE set to 256K, BTRFS build fails
with the following message

  include/linux/compiler_types.h:326:38: error: call to
  '__compiletime_assert_791' declared with attribute error:
  BUILD_BUG_ON failed: (BTRFS_MAX_COMPRESSED % PAGE_SIZE) != 0

BTRFS_MAX_COMPRESSED being 128K, BTRFS cannot support platforms with
256K pages at the time being.

There are two platforms that can select 256K pages:
 - hexagon
 - powerpc

Disable BTRFS when 256K page size is selected. Supporting this would
require changes to the subpage mode that's currently being developed.
Given that 256K is many times larger than page sizes commonly used and
for what the algorithms and structures have been tuned, it's out of
scope and disabling build is a reasonable option.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
[ update changelog ]
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2021-07-14 17:06:28 +02:00
arch KVM: PPC: Book3S HV: Fix TLB management on SMT8 POWER9 and POWER10 processors 2021-07-14 17:06:27 +02:00
block block-5.13-2021-05-22 2021-05-22 07:40:34 -10:00
certs Kbuild updates for v5.13 (2nd) 2021-05-08 10:00:11 -07:00
crypto crypto: shash - avoid comparing pointers to exported functions under CFI 2021-07-14 17:06:26 +02:00
Documentation hwmon: (max31790) Fix pwmX_enable attributes 2021-07-14 17:06:27 +02:00
drivers drivers/perf: fix the missed ida_simple_remove() in ddr_perf_probe() 2021-07-14 17:06:27 +02:00
fs btrfs: disable build on platforms having page size 256K 2021-07-14 17:06:28 +02:00
include crypto: shash - avoid comparing pointers to exported functions under CFI 2021-07-14 17:06:26 +02:00
init sched/core: Initialize the idle task with preemption disabled 2021-07-14 17:06:21 +02:00
ipc ipc/mqueue, msg, sem: avoid relying on a stack reference past its expiry 2021-05-22 15:09:07 -10:00
kernel sched/fair: Take thermal pressure into account while estimating energy 2021-07-14 17:06:27 +02:00
lib seq_buf: Make trace_seq_putmem_hex() support data longer than 8 2021-07-14 17:06:17 +02:00
LICENSES LICENSES: Add the CC-BY-4.0 license 2020-12-08 10:33:27 -07:00
mm mm/gup: fix try_grab_compound_head() race with split_huge_page() 2021-07-14 17:06:12 +02:00
net SUNRPC: Should wake up the privileged task firstly. 2021-07-14 17:06:11 +02:00
samples VFIO fixes for v5.13-rc5 2021-06-03 11:52:24 -07:00
scripts Makefile: fix GDB warning with CONFIG_RELR 2021-07-14 17:06:25 +02:00
security ima: Don't remove security.ima if file must not be appraised 2021-07-14 17:06:24 +02:00
sound ALSA: hda/realtek: fix mute led of the HP Pavilion 15-eh1xxx series 2021-07-14 17:06:04 +02:00
tools selftests/resctrl: Fix incorrect parsing of option "-t" 2021-07-14 17:06:16 +02:00
usr .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
virt KVM: do not allow mapping valid but non-reference-counted pages 2021-06-24 11:55:11 -04:00
.clang-format clang-format: Update with the latest for_each macro list 2021-05-12 23:32:39 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.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 mailmap: add Marek's other e-mail address and identity without diacritics 2021-06-24 19:40:54 -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 Merge branch 'akpm' (patches from Andrew) 2021-06-25 11:05:03 -07:00
Makefile Makefile: fix GDB warning with CONFIG_RELR 2021-07-14 17:06:25 +02:00
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.