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Christophe Leroy d3a1a36e02 kcsan: Don't expect 64 bits atomic builtins from 32 bits architectures 
[ Upstream commit 353e7300a1 ]

Activating KCSAN on a 32 bits architecture leads to the following
link-time failure:

    LD      .tmp_vmlinux.kallsyms1
  powerpc64-linux-ld: kernel/kcsan/core.o: in function `__tsan_atomic64_load':
  kernel/kcsan/core.c:1273: undefined reference to `__atomic_load_8'
  powerpc64-linux-ld: kernel/kcsan/core.o: in function `__tsan_atomic64_store':
  kernel/kcsan/core.c:1273: undefined reference to `__atomic_store_8'
  powerpc64-linux-ld: kernel/kcsan/core.o: in function `__tsan_atomic64_exchange':
  kernel/kcsan/core.c:1273: undefined reference to `__atomic_exchange_8'
  powerpc64-linux-ld: kernel/kcsan/core.o: in function `__tsan_atomic64_fetch_add':
  kernel/kcsan/core.c:1273: undefined reference to `__atomic_fetch_add_8'
  powerpc64-linux-ld: kernel/kcsan/core.o: in function `__tsan_atomic64_fetch_sub':
  kernel/kcsan/core.c:1273: undefined reference to `__atomic_fetch_sub_8'
  powerpc64-linux-ld: kernel/kcsan/core.o: in function `__tsan_atomic64_fetch_and':
  kernel/kcsan/core.c:1273: undefined reference to `__atomic_fetch_and_8'
  powerpc64-linux-ld: kernel/kcsan/core.o: in function `__tsan_atomic64_fetch_or':
  kernel/kcsan/core.c:1273: undefined reference to `__atomic_fetch_or_8'
  powerpc64-linux-ld: kernel/kcsan/core.o: in function `__tsan_atomic64_fetch_xor':
  kernel/kcsan/core.c:1273: undefined reference to `__atomic_fetch_xor_8'
  powerpc64-linux-ld: kernel/kcsan/core.o: in function `__tsan_atomic64_fetch_nand':
  kernel/kcsan/core.c:1273: undefined reference to `__atomic_fetch_nand_8'
  powerpc64-linux-ld: kernel/kcsan/core.o: in function `__tsan_atomic64_compare_exchange_strong':
  kernel/kcsan/core.c:1273: undefined reference to `__atomic_compare_exchange_8'
  powerpc64-linux-ld: kernel/kcsan/core.o: in function `__tsan_atomic64_compare_exchange_weak':
  kernel/kcsan/core.c:1273: undefined reference to `__atomic_compare_exchange_8'
  powerpc64-linux-ld: kernel/kcsan/core.o: in function `__tsan_atomic64_compare_exchange_val':
  kernel/kcsan/core.c:1273: undefined reference to `__atomic_compare_exchange_8'

32 bits architectures don't have 64 bits atomic builtins. Only
include DEFINE_TSAN_ATOMIC_OPS(64) on 64 bits architectures.

Fixes: 0f8ad5f2e9 ("kcsan: Add support for atomic builtins")
Suggested-by: Marco Elver <elver@google.com>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Reviewed-by: Marco Elver <elver@google.com>
Acked-by: Marco Elver <elver@google.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/d9c6afc28d0855240171a4e0ad9ffcdb9d07fceb.1683892665.git.christophe.leroy@csgroup.eu
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-08-20 15:24:34 +08:00
arch arm64: dts: mediatek: mt8192: Fix CPUs capacity-dmips-mhz 2023-08-20 15:24:32 +08:00
block blk-iocost: use spin_lock_irqsave in adjust_inuse_and_calc_cost 2023-08-20 15:24:15 +08:00
certs certs/blacklist_hashes.c: fix const confusion in certs blacklist 2023-04-19 17:50:34 +08:00
crypto KEYS: asymmetric: Copy sig and digest in public_key_verify_signature() 2023-08-20 15:21:12 +08:00
Documentation Remove DECnet support from kernel 2023-08-20 15:23:42 +08:00
drivers pinctrl: cherryview: Return correct value if pin in push-pull mode 2023-08-20 15:24:34 +08:00
fs ovl: update of dentry revalidate flags after copy up 2023-08-20 15:24:33 +08:00
include PCI: Add pci_clear_master() stub for non-CONFIG_PCI 2023-08-20 15:24:34 +08:00
init kbuild: Add CONFIG_PAHOLE_VERSION 2023-04-19 17:59:33 +08:00
io_uring io_uring/net: disable partial retries for recvmsg with cmsg 2023-08-20 15:23:59 +08:00
ipc ipc/sem: Fix dangling sem_array access in semtimedop race 2023-04-19 17:56:54 +08:00
kernel kcsan: Don't expect 64 bits atomic builtins from 32 bits architectures 2023-08-20 15:24:34 +08:00
lib lib/ts_bm: reset initial match offset for every block of text 2023-08-20 15:24:23 +08:00
LICENSES LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes" 2021-07-15 06:31:24 -06:00
mm mm, hwpoison: when copy-on-write hits poison, take page offline 2023-08-20 15:24:10 +08:00
net netlink: Add __sock_i_ino() for __netlink_diag_dump(). 2023-08-20 15:24:23 +08:00
samples samples/bpf: Fix buffer overflow in tcp_basertt 2023-08-20 15:24:18 +08:00
scripts scripts/tags.sh: Resolve gtags empty index generation 2023-08-20 15:24:11 +08:00
security ima: Fix build warnings 2023-08-20 15:24:17 +08:00
sound ASoC: imx-audmix: check return value of devm_kasprintf() 2023-08-20 15:24:33 +08:00
tools perf bench: Add missing setlocale() call to allow usage of %'d style formatting 2023-08-20 15:24:34 +08:00
usr usr/include/Makefile: add linux/nfc.h to the compile-test coverage 2023-04-19 17:44:58 +08:00
virt KVM: Avoid illegal stage2 mapping on invalid memory slot 2023-08-20 15:23:58 +08:00
.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 Andrej Shadura 2021-10-18 20:22:03 -10:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Move Daniel Drake to credits 2021-09-21 08:34:58 +03:00
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 Remove DECnet support from kernel 2023-08-20 15:23:42 +08:00
Makefile Linux 5.15.120 2023-08-20 15:24:11 +08:00
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.