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Niklas Schnelle 485b1c02b5 s390: enable HAVE_IOREMAP_PROT [ Upstream commit `d460bb6c64` ] In commit `b02002cc4c` ("s390/pci: Implement ioremap_wc/prot() with MIO") we implemented both ioremap_wc() and ioremap_prot() however until now we had not set HAVE_IOREMAP_PROT in Kconfig, do so now. This also requires implementing pte_pgprot() as this is used in the generic_access_phys() code enabled by CONFIG_HAVE_IOREMAP_PROT. As with ioremap_wc() we need to take the MMIO Write Back bit index into account. Moreover since the pgprot value returned from pte_pgprot() is to be used for mappings into kernel address space we must make sure that it uses appropriate kernel page table protection bits. In particular a pgprot value originally coming from userspace could have the _PAGE_PROTECT bit set to enable fault based dirty bit accounting which would then make the mapping inaccessible when used in kernel address space. Fixes: `b02002cc4c` ("s390/pci: Implement ioremap_wc/prot() with MIO") Reviewed-by: Gerald Schaefer <gerald.schaefer@linux.ibm.com> Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-07-14 16:56:42 +02:00
arch	s390: enable HAVE_IOREMAP_PROT	2021-07-14 16:56:42 +02:00
block	blk-mq: update hctx->dispatch_busy in case of real scheduler	2021-07-14 16:56:13 +02:00
certs	certs: Add ability to preload revocation certs	2021-06-30 08:47:30 -04:00
crypto	crypto: sm2 - fix a memory leak in sm2	2021-07-14 16:56:06 +02:00
Documentation	mm/debug_vm_pgtable/basic: add validation for dirtiness after write protect	2021-07-14 16:56:13 +02:00
drivers	iommu/amd: Fix extended features logging	2021-07-14 16:56:41 +02:00
fs	writeback: fix obtain a reference to a freeing memcg css	2021-07-14 16:56:31 +02:00
include	iio: cros_ec_sensors: Fix alignment of buffer in iio_push_to_buffers_with_timestamp()	2021-07-14 16:56:37 +02:00
init	sched/core: Initialize the idle task with preemption disabled	2021-07-14 16:55:50 +02:00
ipc
kernel	rcu: Invoke rcu_spawn_core_kthreads() from rcu_spawn_gp_kthread()	2021-07-14 16:56:33 +02:00
lib	lockdep/selftests: Fix selftests vs PROVE_RAW_LOCK_NESTING	2021-07-14 16:56:10 +02:00
LICENSES
mm	mm/page_alloc: fix counting of managed_pages	2021-07-14 16:56:14 +02:00
net	net: tipc: fix FB_MTU eat two pages	2021-07-14 16:56:32 +02:00
samples	samples/bpf: Fix the error return code of xdp_redirect's main()	2021-07-14 16:56:23 +02:00
scripts	kbuild: Fix objtool dependency for 'OBJECT_FILES_NON_STANDARD_<obj> := n'	2021-07-14 16:56:04 +02:00
security	evm: fix writing <securityfs>/evm overflow	2021-07-14 16:56:04 +02:00
sound	ASoC: rsnd: tidyup loop on rsnd_adg_clk_query()	2021-07-14 16:56:38 +02:00
tools	perf scripting python: Fix tuple_set_u64()	2021-07-14 16:56:38 +02:00
usr
virt	KVM: do not allow mapping valid but non-reference-counted pages	2021-06-30 08:47:25 -04:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS
Makefile	Makefile: fix GDB warning with CONFIG_RELR	2021-07-14 16:55:53 +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.