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Heiko Carstens 8110c3c809 s390/idle: mark arch_cpu_idle() noinstr [ Upstream commit `a9cbc1b471` ] linux-next commit ("cpuidle: tracing: Warn about !rcu_is_watching()") adds a new warning which hits on s390's arch_cpu_idle() function: RCU not on for: arch_cpu_idle+0x0/0x28 WARNING: CPU: 2 PID: 0 at include/linux/trace_recursion.h:162 arch_ftrace_ops_list_func+0x24c/0x258 Modules linked in: CPU: 2 PID: 0 Comm: swapper/2 Not tainted 6.2.0-rc6-next-20230202 #4 Hardware name: IBM 8561 T01 703 (z/VM 7.3.0) Krnl PSW : 0404d00180000000 00000000002b55c0 (arch_ftrace_ops_list_func+0x250/0x258) R:0 T:1 IO:0 EX:0 Key:0 M:1 W:0 P:0 AS:3 CC:1 PM:0 RI:0 EA:3 Krnl GPRS: c0000000ffffbfff 0000000080000002 0000000000000026 0000000000000000 0000037ffffe3a28 0000037ffffe3a20 0000000000000000 0000000000000000 0000000000000000 0000000000f4acf6 00000000001044f0 0000037ffffe3cb0 0000000000000000 0000000000000000 00000000002b55bc 0000037ffffe3bb8 Krnl Code: 00000000002b55b0: c02000840051 larl %r2,0000000001335652 00000000002b55b6: c0e5fff512d1 brasl %r14,0000000000157b58 #00000000002b55bc: af000000 mc 0,0 >00000000002b55c0: a7f4ffe7 brc 15,00000000002b558e 00000000002b55c4: 0707 bcr 0,%r7 00000000002b55c6: 0707 bcr 0,%r7 00000000002b55c8: eb6ff0480024 stmg %r6,%r15,72(%r15) 00000000002b55ce: b90400ef lgr %r14,%r15 Call Trace: [<00000000002b55c0>] arch_ftrace_ops_list_func+0x250/0x258 ([<00000000002b55bc>] arch_ftrace_ops_list_func+0x24c/0x258) [<0000000000f5f0fc>] ftrace_common+0x1c/0x20 [<00000000001044f6>] arch_cpu_idle+0x6/0x28 [<0000000000f4acf6>] default_idle_call+0x76/0x128 [<00000000001cc374>] do_idle+0xf4/0x1b0 [<00000000001cc6ce>] cpu_startup_entry+0x36/0x40 [<0000000000119d00>] smp_start_secondary+0x140/0x150 [<0000000000f5d2ae>] restart_int_handler+0x6e/0x90 Mark arch_cpu_idle() noinstr like all other architectures with CONFIG_ARCH_WANTS_NO_INSTR (should) have it to fix this. Reviewed-by: Sven Schnelle <svens@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2023-04-19 18:00:10 +08:00
arch	s390/idle: mark arch_cpu_idle() noinstr	2023-04-19 18:00:10 +08:00
block	blk-iocost: fix divide by 0 error in calc_lcoefs()	2023-04-19 18:00:08 +08:00
certs	certs/blacklist_hashes.c: fix const confusion in certs blacklist	2023-04-19 17:50:34 +08:00
crypto	crypto: rsa-pkcs1pad - Use akcipher_request_complete	2023-04-19 17:59:48 +08:00
Documentation	ASoC: dt-bindings: meson: fix gx-card codec node regex	2023-04-19 17:59:55 +08:00
drivers	net/mlx5: fw_tracer: Fix debug print	2023-04-19 18:00:10 +08:00
fs	coda: Avoid partial allocation of sig_inputArgs	2023-04-19 18:00:10 +08:00
include	uaccess: Add minimum bounds check on kernel buffer size	2023-04-19 18:00:10 +08:00
init	kbuild: Add CONFIG_PAHOLE_VERSION	2023-04-19 17:59:33 +08:00
io_uring	io_uring: ensure that io_init_req() passes in the right issue_flags	2023-04-19 17:59:36 +08:00
ipc	ipc/sem: Fix dangling sem_array access in semtimedop race	2023-04-19 17:56:54 +08:00
kernel	clocksource: Suspend the watchdog temporarily when high read latency detected	2023-04-19 18:00:09 +08:00
lib	kobject: Fix slab-out-of-bounds in fill_kobj_path()	2023-04-19 18:00:00 +08:00
LICENSES	LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes"	2021-07-15 06:31:24 -06:00
mm	mm/filemap: fix page end in filemap_get_read_batch	2023-04-19 17:59:29 +08:00
net	netfilter: nf_tables: NULL pointer dereference in nf_tables_updobj()	2023-04-19 18:00:10 +08:00
samples	samples: vfio-mdev: Fix missing pci_disable_device() in mdpy_fb_probe()	2023-04-19 17:57:46 +08:00
scripts	builddeb: clean generated package content	2023-04-19 18:00:06 +08:00
security	tomoyo: fix broken dependency on *.conf.default	2023-04-19 17:58:50 +08:00
sound	ASoC: tlv320adcx140: fix 'ti,gpio-config' DT property init	2023-04-19 17:59:56 +08:00
tools	tools/power/x86/intel-speed-select: Add Emerald Rapid quirk	2023-04-19 18:00:10 +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: Add support for arch compat vm ioctls	2023-04-19 17:55:40 +08:00
.clang-format	clang-format: Update with the latest for_each macro list	2021-05-12 23:32:39 +02:00
.cocciconfig
.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	kbuild: Add CONFIG_PAHOLE_VERSION	2023-04-19 17:59:33 +08:00
Makefile	Linux 5.15.98	2023-04-19 17:59:36 +08:00
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.