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Heiko Carstens a9cbc1b471 s390/idle: mark arch_cpu_idle() noinstr 
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>
2023-02-09 20:11:22 +01:00
..
syscalls
arch: syscalls: simplify uapi/kapi directory creation
2022-03-31 12:03:46 +09:00
vdso32
s390/vdso: remove -nostdlib compiler flag
2021-11-16 12:29:19 +01:00
vdso64
s390/vdso: filter out -mstack-guard and -mstack-size
2021-11-16 12:29:19 +01:00
.gitignore
.gitignore: add SPDX License Identifier
2020-03-25 11:50:48 +01:00
abs_lowcore.c
s390/mm: allocate Absolute Lowcore Area in decompressor
2023-01-13 14:15:06 +01:00
alternative.c
s390/alternatives: remove padding generation code
2022-05-17 15:16:28 +02:00
asm-offsets.c
s390/entry: sort out physical vs virtual pointers usage in sie64a
2022-10-26 14:27:41 +02:00
audit.c
audit: add support for the openat2 syscall
2021-10-01 16:52:48 -04:00
audit.h
…
cache.c
s390/cache: change type from unsigned long long to unsigned long
2023-01-25 20:51:09 +01:00
compat_audit.c
audit: add support for the openat2 syscall
2021-10-01 16:52:48 -04:00
compat_linux.c
…
compat_linux.h
s390/compat: cleanup compat_linux.h header file
2022-05-06 20:45:16 +02:00
compat_ptrace.h
…
compat_signal.c
s390/signal: fix typo in comments
2022-03-08 00:33:01 +01:00
cpcmd.c
s390/cpcmd: use physical address for command and response
2021-10-26 15:21:28 +02:00
cpufeature.c
s390/uvdevice: autoload module based on CPU facility
2022-07-19 16:18:49 +02:00
crash_dump.c
iov_iter work; most of that is about getting rid of
2022-12-12 18:29:54 -08:00
debug.c
s390/debug: remove function type cast
2022-11-23 16:24:07 +01:00
diag.c
s390/diag: make __diag8c_tmp_amode31 static
2023-02-06 11:13:54 +01:00
dis.c
s390/disassembler: update opcode table
2021-12-16 19:58:07 +01:00
dumpstack.c
exit: Add and use make_task_dead.
2021-12-13 12:04:45 -06:00
early_printk.c
s390/sclp: remove unused sclp_early_printk_forced
2020-09-21 08:08:44 +02:00
early.c
s390/mm: start kernel with DAT enabled
2023-01-13 14:15:05 +01:00
earlypgm.S
s390: generate register offsets into pt_regs automatically
2022-05-25 11:46:02 +02:00
ebcdic.c
…
entry.h
s390: move __amode31_base declaration to proper header file
2023-01-13 14:15:07 +01:00
entry.S
ARM64:
2022-12-15 11:12:21 -08:00
fpu.c
s390/vx: add vx-insn.h wrapper include file
2022-12-06 16:18:23 +01:00
ftrace.c
ftrace: Remove return value of ftrace_arch_modify_*()
2022-05-26 21:13:00 -04:00
ftrace.h
s390: raise minimum supported machine generation to z10
2022-03-10 15:58:17 +01:00
guarded_storage.c
…
head64.S
s390/early: fix sclp_early_sccb variable lifetime
2023-01-13 14:15:04 +01:00
idle.c
s390/idle: mark arch_cpu_idle() noinstr
2023-02-09 20:11:22 +01:00
ima_arch.c
…
ipl_vmparm.c
s390/cio: remove unused include linux/spinlock.h from cio.h
2021-07-27 09:39:13 +02:00
ipl.c
s390/ipl: add loadparm parameter to eckd ipl/reipl data
2023-02-06 11:13:52 +01:00
irq.c
s390/irq: utilize RCU instead of irq_lock_sparse() in show_msi_interrupt()
2022-04-27 12:53:34 +02:00
jump_label.c
jump_label: make initial NOP patching the special case
2022-06-24 09:48:55 +02:00
kdebugfs.c
…
kexec_elf.c
kexec: Fix file verification on S390
2019-09-10 13:27:51 +01:00
kexec_image.c
…
kprobes_insn_page.S
s390/kprobes: move insn_page to text segment
2020-10-09 23:45:30 +02:00
kprobes.c
s390/kprobes: replace kretprobe with rethook
2023-01-22 18:42:35 +01:00
kprobes.h
s390/kprobes: define insn cache ops within private header file
2022-11-23 16:24:07 +01:00
lgr.c
s390/lgr: use simple assignment instead of memcpy
2022-02-06 23:31:29 +01:00
machine_kexec_file.c
s390/kexec: fix ipl report address for kdump
2023-01-10 14:37:02 +01:00
machine_kexec_reloc.c
s390/kaslr: add support for R_390_JMP_SLOT relocation type
2020-05-20 10:13:27 +02:00
machine_kexec.c
s390/mm: allocate Absolute Lowcore Area in decompressor
2023-01-13 14:15:06 +01:00
Makefile
s390/cpum_cf: merge source files for CPU Measurement counter facility
2023-01-25 20:51:10 +01:00
mcount.S
s390/kprobes: replace kretprobe with rethook
2023-01-22 18:42:35 +01:00
module.c
jump_label: mips: move module NOP patching into arch code
2022-06-24 09:48:55 +02:00
nmi.c
s390/nmi: get rid of private slab cache
2022-12-06 16:18:26 +01:00
nospec-branch.c
s390: raise minimum supported machine generation to z10
2022-03-10 15:58:17 +01:00
nospec-sysfs.c
s390: introduce nospec_uses_trampoline()
2021-10-26 15:21:29 +02:00
numa.c
drivers/base/node: consolidate node device subsystem initialization in node_dev_init()
2022-03-22 15:57:10 -07:00
os_info.c
s390/mm: allocate Absolute Lowcore Area in decompressor
2023-01-13 14:15:06 +01:00
perf_cpum_cf_events.c
s390/cpumf: add new extended counter set for IBM z16
2022-05-16 10:58:33 +02:00
perf_cpum_cf.c
s390/cpum_cf: simplify PMC_INIT and PMC_RELEASE usage
2023-01-25 20:51:10 +01:00
perf_cpum_sf.c
s390/cpum_sf: diagnostic sampling buffer setup to handle virtual addresses
2023-01-22 18:42:35 +01:00
perf_event.c
s390/stack: add union to reflect kvm stack slot usages
2022-06-01 12:03:17 +02:00
perf_pai_crypto.c
Perf events updates for v6.2:
2022-12-12 15:19:38 -08:00
perf_pai_ext.c
s390/cpum_cf: merge source files for CPU Measurement counter facility
2023-01-25 20:51:10 +01:00
perf_regs.c
perf/arch: Remove perf_sample_data::regs_user_copy
2020-11-09 18:12:34 +01:00
process.c
s390/mm: start kernel with DAT enabled
2023-01-13 14:15:05 +01:00
processor.c
s390/cpufeature: rework to allow more than only hwcap bits
2022-07-19 16:18:49 +02:00
ptrace.c
ptrace: Cleanups for v5.18
2022-03-28 17:29:53 -07:00
reipl.S
…
relocate_kernel.S
s390/kexec: set end-of-ipl flag in last diag308 call
2022-04-25 13:54:12 +02:00
rethook.c
s390/rethook: add local rethook header file
2023-02-06 11:13:53 +01:00
rethook.h
s390/rethook: add local rethook header file
2023-02-06 11:13:53 +01:00
runtime_instr.c
s390/runtime_instrumentation: fix storage key handling
2020-08-17 13:17:10 +02:00
setup.c
s390/mem_detect: handle online memory limit just once
2023-02-06 11:13:54 +01:00
signal.c
ptrace: Cleanups for v5.18
2022-03-28 17:29:53 -07:00
smp.c
s390/mm: allocate Absolute Lowcore Area in decompressor
2023-01-13 14:15:06 +01:00
stacktrace.c
s390/kprobes: replace kretprobe with rethook
2023-01-22 18:42:35 +01:00
sthyi.c
s390/sthyi: use register pair instead of register asm
2021-06-18 16:41:22 +02:00
syscall.c
s390: add support for BEAR enhancement facility
2021-10-26 15:21:29 +02:00
sysinfo.c
s390/extable: move EX_TABLE define to asm-extable.h
2022-03-08 00:33:00 +01:00
text_amode31.S
s390/tty3270: add support for diag 8c
2023-01-09 14:33:56 +01:00
time.c
s390/stp: clock_delta should be signed
2022-05-11 14:40:57 +02:00
topology.c
s390: remove invalid email address of Heiko Carstens
2022-02-06 23:31:29 +01:00
trace.c
s390/ftrace: fix potential crashes when switching tracers
2020-04-22 16:20:55 +02:00
traps.c
s390/traps: improve panic message for translation-specification exception
2022-03-27 22:18:38 +02:00
unwind_bc.c
s390/unwind: avoid duplicated unwinding entries for kretprobes
2022-03-27 22:18:39 +02:00
uprobes.c
s390: raise minimum supported machine generation to z10
2022-03-10 15:58:17 +01:00
uv.c
KVM: s390: pv: avoid export before import if possible
2022-11-23 09:06:50 +00:00
vdso.c
Random number generator updates for Linux 6.2-rc1.
2022-12-12 16:22:22 -08:00
vmlinux.lds.S
s390: discard .interp section
2023-01-25 20:51:10 +01:00
vtime.c
s390: assume stckf is always present
2022-03-10 15:58:17 +01:00