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Arnd Bergmann cdb775fce4 UPSTREAM: kasan: fix kasan_check_read/write definitions 
(Upstream commit bcf6f55a0d).

Building little-endian allmodconfig kernels on arm64 started failing
with the generated atomic.h implementation, since we now try to call
kasan helpers from the EFI stub:

  aarch64-linux-gnu-ld: drivers/firmware/efi/libstub/arm-stub.stub.o: in function `atomic_set':
  include/generated/atomic-instrumented.h:44: undefined reference to `__efistub_kasan_check_write'

I suspect that we get similar problems in other files that explicitly
disable KASAN for some reason but call atomic_t based helper functions.

We can fix this by checking the predefined __SANITIZE_ADDRESS__ macro
that the compiler sets instead of checking CONFIG_KASAN, but this in
turn requires a small hack in mm/kasan/common.c so we do see the extern
declaration there instead of the inline function.

Link: http://lkml.kernel.org/r/20181211133453.2835077-1-arnd@arndb.de
Fixes: b1864b828644 ("locking/atomics: build atomic headers as required")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reported-by: Anders Roxell <anders.roxell@linaro.org>
Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Andrey Konovalov <andreyknvl@google.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>,
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Bug: 128674696
Change-Id: Ib6836f63fc9dfe594cd8ce4e99f2ad4489c98a53
2019-09-24 17:44:15 -07:00
arch BACKPORT: kasan: remove use after scope bugs detection. 2019-09-24 17:44:15 -07:00
block This is the 4.19.73 stable release 2019-09-16 09:35:02 +02:00
certs export.h: remove VMLINUX_SYMBOL() and VMLINUX_SYMBOL_STR() 2018-08-22 23:21:44 +09:00
crypto This is the 4.19.61 stable release 2019-07-26 10:31:53 +02:00
Documentation UPSTREAM: kasan: update documentation 2019-09-24 17:44:13 -07:00
drivers This is the 4.19.75 stable release 2019-09-21 07:55:26 +02:00
firmware kbuild: remove all dummy assignments to obj- 2017-11-18 11:46:06 +09:00
fs This is the 4.19.75 stable release 2019-09-21 07:55:26 +02:00
include UPSTREAM: kasan: fix kasan_check_read/write definitions 2019-09-24 17:44:15 -07:00
init ANDROID: net: enable wireless core features with GKI_LEGACY_WEXT_ALLCONFIG 2019-09-20 19:17:14 +00:00
ipc This is the 4.19.65 stable release 2019-08-06 20:08:18 +02:00
kernel This is the 4.19.75 stable release 2019-09-21 07:55:26 +02:00
lib BACKPORT: kasan: remove use after scope bugs detection. 2019-09-24 17:44:15 -07:00
LICENSES LICENSES: Remove CC-BY-SA-4.0 license text 2018-10-18 11:28:50 +02:00
mm UPSTREAM: kasan: fix kasan_check_read/write definitions 2019-09-24 17:44:15 -07:00
net This is the 4.19.75 stable release 2019-09-21 07:55:26 +02:00
samples samples, bpf: suppress compiler warning 2019-07-14 08:11:04 +02:00
scripts BACKPORT: kasan: remove use after scope bugs detection. 2019-09-24 17:44:15 -07:00
security BACKPORT: kasan: remove use after scope bugs detection. 2019-09-24 17:44:15 -07:00
sound UPSTREAM: ALSA: pcm: add support for 352.8KHz and 384KHz sample rate 2019-09-18 20:34:13 +00:00
tools This is the 4.19.75 stable release 2019-09-21 07:55:26 +02:00
usr initramfs: move gen_initramfs_list.sh from scripts/ to usr/ 2018-08-22 23:21:44 +09:00
virt KVM: coalesced_mmio: add bounds checking 2019-09-21 07:16:44 +02:00
.clang-format clang-format: Set IndentWrappedFunctionNames false 2018-08-01 18:38:51 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore
.gitattributes .gitattributes: set git diff driver for C source code files 2016-10-07 18:46:30 -07:00
.gitignore Kbuild updates for v4.17 (2nd) 2018-04-15 17:21:30 -07:00
.mailmap libnvdimm-for-4.19_misc 2018-08-25 18:13:10 -07:00
abi_gki_aarch64.xml ANDROID: enable CONFIG_ION_SYSTEM_HEAP for GKI 2019-09-23 23:26:20 -07:00
build.config.gki.aarch64 Adding GKI Ramdisk to gki config 2019-08-14 18:17:18 +00:00
build.config.gki.x86_64 Adding GKI Ramdisk to gki config 2019-08-14 18:17:18 +00:00
COPYING COPYING: use the new text with points to the license files 2018-03-23 12:41:45 -06:00
CREDITS 9p: remove Ron Minnich from MAINTAINERS 2018-08-17 16:20:26 -07:00
Kbuild Kbuild updates for v4.15 2017-11-17 17:45:29 -08:00
Kconfig kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt 2018-08-02 08:06:55 +09:00
MAINTAINERS platform/x86: Add Intel AtomISP2 dummy / power-management driver 2019-04-20 09:16:02 +02:00
Makefile This is the 4.19.75 stable release 2019-09-21 07:55:26 +02:00
README Docs: Added a pointer to the formatted docs to README 2018-03-21 09:02:53 -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.
See Documentation/00-INDEX for a list of what is contained in each file.

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.