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611c390217
android_kernel_samsung_sm8650/arch/s390/kernel
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Heiko Carstens 611c390217 s390/idle: mark arch_cpu_idle() noinstr 
[ Upstream commit a9cbc1b471d291c865907542394f1c483b93a811 ]

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>
2023-03-10 09:33:52 +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: Drop '-shared' from KBUILD_CFLAGS_64 2023-03-10 09:33:41 +01:00
.gitignore
abs_lowcore.c s390/smp: rework absolute lowcore access 2022-09-14 16:46:00 +02:00
alternative.c s390/alternatives: remove padding generation code 2022-05-17 15:16:28 +02:00
asm-offsets.c s390/stack: add union to reflect kvm stack slot usages 2022-06-01 12:03:17 +02:00
audit.c audit: add support for the openat2 syscall 2021-10-01 16:52:48 -04:00
audit.h
cache.c s390: raise minimum supported machine generation to z10 2022-03-10 15:58:17 +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 use less confusing names for iov_iter direction initializers 2023-02-09 11:28:04 +01:00
debug.c s390: move from strlcpy with unused retval to strscpy 2022-08-30 22:00:33 +02:00
diag.c s390/extable: move EX_TABLE define to asm-extable.h 2022-03-08 00:33:00 +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
early.c s390/early: fix sclp_early_sccb variable lifetime 2023-03-10 09:32:53 +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: simplify early program check handler 2022-05-25 11:46:02 +02:00
entry.S s390/mcck: isolate SIE instruction when setting CIF_MCCK_GUEST flag 2022-06-01 12:03:16 +02:00
fpu.c s390: convert to generic entry 2021-01-19 12:29:26 +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 2023-03-10 09:32:53 +01:00
idle.c s390/idle: mark arch_cpu_idle() noinstr 2023-03-10 09:33:52 +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/smp: rework absolute lowcore access 2022-09-14 16:46:00 +02:00
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_image.c
kprobes_insn_page.S
kprobes.c s390/kprobes: enable kretprobes framepointer verification 2022-03-27 22:18:39 +02:00
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 2023-01-18 11:58:11 +01:00
machine_kexec_reloc.c
machine_kexec.c s390/smp: rework absolute lowcore access 2022-09-14 16:46:00 +02:00
Makefile Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
mcount.S s390/kprobes: Avoid additional kprobe in kretprobe handling 2022-03-10 15:58:17 +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/boot: fix absolute zero lowcore corruption on boot 2022-09-07 14:04:01 +02:00
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: uninline copy_oldmem_kernel() function 2022-09-14 16:46:01 +02:00
perf_cpum_cf_common.c s390/cpumf: Support for CPU Measurement Facility CSVN 7 2022-01-17 14:13:08 +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 perf: Use sample_flags for raw_data 2022-09-27 22:50:24 +02:00
perf_cpum_sf.c s390/cpum_sf: add READ_ONCE() semantics to compare and swap loops 2023-01-18 11:58:12 +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: Use sample_flags for raw_data 2022-09-27 22:50:24 +02:00
perf_pai_ext.c s390/pai: fix raw data collection for PMU pai_ext 2022-10-26 14:47:31 +02:00
perf_regs.c perf/arch: Remove perf_sample_data::regs_user_copy 2020-11-09 18:12:34 +01:00
process.c treewide: use get_random_{u8,u16}() when possible, part 2 2022-10-11 17:42:58 -06:00
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
runtime_instr.c
setup.c s390: workaround invalid gcc-11 out of bounds read warning 2023-02-06 08:06:33 +01:00
signal.c ptrace: Cleanups for v5.18 2022-03-28 17:29:53 -07:00
smp.c s390/mm: uninline copy_oldmem_kernel() function 2022-09-14 16:46:01 +02:00
stacktrace.c s390: remove invalid email address of Heiko Carstens 2022-02-06 23:31:29 +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/extable: move EX_TABLE define to asm-extable.h 2022-03-08 00:33:00 +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
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: add export before import 2022-07-13 14:42:11 +00:00
vdso.c treewide: use prandom_u32_max() when possible, part 1 2022-10-11 17:42:55 -06:00
vmlinux.lds.S s390: define RUNTIME_DISCARD_EXIT to fix link error with GNU ld < 2.36 2023-02-25 11:25:42 +01:00
vtime.c s390: assume stckf is always present 2022-03-10 15:58:17 +01:00