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Peter Zijlstra 2a9baf5ad4 x86/debug: Fix BTF handling 
The SDM states that #DB clears DEBUGCTLMSR_BTF, this means that when the
bit is set for userspace (TIF_BLOCKSTEP) and a kernel #DB happens first,
the BTF bit meant for userspace execution is lost.

Have the kernel #DB handler restore the BTF bit when it was requested
for userspace.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Kyle Huey <me@kylehuey.com> 
Link: https://lore.kernel.org/r/20201027093607.956147736@infradead.org
2020-10-27 23:15:23 +01:00
arch
x86/debug: Fix BTF handling
2020-10-27 23:15:23 +01:00
block
Merge tag 'block-5.10-2020-10-24' of git://git.kernel.dk/linux-block
2020-10-24 12:46:42 -07:00
certs
.gitignore: add SPDX License Identifier
2020-03-25 11:50:48 +01:00
crypto
Merge tag 'drivers-5.10-2020-10-12' of git://git.kernel.dk/linux-block
2020-10-13 13:04:41 -07:00
Documentation
dt-bindings: Another round of adding missing 'additionalProperties/unevalutatedProperties'
2020-10-26 16:13:56 -05:00
drivers
Merge tag 'x86-urgent-2020-10-27' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2020-10-27 14:39:29 -07:00
fs
cachefiles: Handle readpage error correctly
2020-10-26 10:42:54 -07:00
include
vmlinux.lds.h: Keep .ctors.* with .ctors
2020-10-27 11:13:41 -07:00
init
Merge tag 'linux-kselftest-kunit-5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
2020-10-18 14:45:59 -07:00
ipc
ipc: adjust proc_ipc_sem_dointvec definition to match prototype
2020-09-05 12:14:29 -07:00
kernel
treewide: Convert macro and uses of __section(foo) to __section("foo")
2020-10-25 14:51:49 -07:00
lib
Merge tag '20201024-v4-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/wtarreau/prandom
2020-10-25 10:40:08 -07:00
LICENSES
LICENSES/deprecated: add Zlib license text
2020-09-16 14:33:49 +02:00
mm
mm/process_vm_access: Add missing #include <linux/compat.h>
2020-10-27 12:41:29 -07:00
net
mm: remove kzfree() compatibility definition
2020-10-25 11:39:02 -07:00
samples
bpf, libbpf: Guard bpf inline asm from bpf_tail_call_static
2020-10-22 01:46:52 +02:00
scripts
treewide: Convert macro and uses of __section(foo) to __section("foo")
2020-10-25 14:51:49 -07:00
security
Merge tag 'safesetid-5.10' of git://github.com/micah-morton/linux
2020-10-25 10:45:26 -07:00
sound
Merge tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
2020-10-24 10:33:08 -07:00
tools
treewide: Convert macro and uses of __section(foo) to __section("foo")
2020-10-25 14:51:49 -07:00
usr
Merge branch 'work.fdpic' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-08-07 13:29:39 -07:00
virt
kvm: x86/mmu: Support dirty logging for the TDP MMU
2020-10-23 03:42:13 -04:00
.clang-format
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma
2020-10-17 11:18:18 -07:00
.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: docs: ignore sphinx_*/ directories
2020-09-10 10:44:31 -06:00
.mailmap
MAINTAINERS: jarkko.sakkinen@linux.intel.com -> jarkko@kernel.org
2020-10-16 11:11:19 -07:00
COPYING
COPYING: state that all contributions really are covered by this file
2020-02-10 13:32:20 -08:00
CREDITS
Merge tag 'net-next-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
2020-10-15 18:42:13 -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 tag 'armsoc-dt' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
2020-10-24 10:44:18 -07:00
Makefile
Linux 5.10-rc1
2020-10-25 15:14:11 -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.
Description
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