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Heiko Carstens 49aa499521 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>
History 2023-03-10 09:39:50 +01:00
..
alpha alpha/boot/tools/objstrip: fix the check for ELF header 2023-03-10 09:39:35 +01:00
arc arc: iounmap() arg is volatile 2022-11-03 23:59:15 +09:00
arm ARM: dts: exynos: Use Exynos5420 compatible for the MIPI video phy 2023-03-10 09:39:46 +01:00
arm64 arm64: dts: qcom: pmk8350: Use the correct PON compatible 2023-03-10 09:39:05 +01:00
csky kprobes: treewide: Cleanup the error messages for kprobes 2023-02-22 12:57:00 +01:00
h8300 h8300: Fix build errors from do_exit() to make_task_dead() transition 2023-02-01 08:27:21 +01:00
hexagon hexagon: Fix function name in die() 2023-02-01 08:27:20 +01:00
ia64 ia64: make IA64_MCA_RECOVERY bool instead of tristate 2023-02-01 08:27:21 +01:00
m68k m68k: Check syscall_trace_enter() return code 2023-03-10 09:39:49 +01:00
microblaze exit: Add and use make_task_dead. 2023-02-01 08:27:20 +01:00
mips kprobes: treewide: Cleanup the error messages for kprobes 2023-02-22 12:57:00 +01:00
nds32 exit: Add and use make_task_dead. 2023-02-01 08:27:20 +01:00
nios2 exit: Add and use make_task_dead. 2023-02-01 08:27:20 +01:00
openrisc exit: Add and use make_task_dead. 2023-02-01 08:27:20 +01:00
parisc parisc: Wire up PTRACE_GETREGS/PTRACE_SETREGS for compat case 2023-02-09 11:26:44 +01:00
powerpc powerpc: Remove linker flag from KBUILD_AFLAGS 2023-03-10 09:39:44 +01:00
riscv RISC-V: time: initialize hrtimer based broadcast clock event device 2023-03-10 09:39:16 +01:00
s390 s390/idle: mark arch_cpu_idle() noinstr 2023-03-10 09:39:50 +01:00
sh exit: Add and use make_task_dead. 2023-02-01 08:27:20 +01:00
sparc sparc: allow PM configs for sparc32 COMPILE_TEST 2023-03-10 09:39:33 +01:00
um UM: cpuinfo: Fix a warning for CONFIG_CPUMASK_OFFSTACK 2022-10-26 12:34:23 +02:00
x86 x86/bugs: Reset speculation control settings on init 2023-03-10 09:39:48 +01:00
xtensa exit: Add and use make_task_dead. 2023-02-01 08:27:20 +01:00
.gitignore .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
Kconfig arch: make TRACE_IRQFLAGS_NMI_SUPPORT generic 2022-08-17 14:23:00 +02:00