Huacai Chen 4e32f5998f LoongArch/smp: Call rcutree_report_cpu_starting() earlier ... commit a2ccf46333d7b2cf9658f0d82ac74097c1542fae upstream. rcutree_report_cpu_starting() must be called before cpu_probe() to avoid the following lockdep splat that triggered by calling __alloc_pages() when CONFIG_PROVE_RCU_LIST=y: ============================= WARNING: suspicious RCU usage 6.6.0+ #980 Not tainted ----------------------------- kernel/locking/lockdep.c:3761 RCU-list traversed in non-reader section!! other info that might help us debug this: RCU used illegally from offline CPU! rcu_scheduler_active = 1, debug_locks = 1 1 lock held by swapper/1/0: #0: 900000000c82ef98 (&pcp->lock){+.+.}-{2:2}, at: get_page_from_freelist+0x894/0x1790 CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.6.0+ #980 Stack : 0000000000000001 9000000004f79508 9000000004893670 9000000100310000 90000001003137d0 0000000000000000 90000001003137d8 9000000004f79508 0000000000000000 0000000000000001 0000000000000000 90000000048a3384 203a656d616e2065 ca43677b3687e616 90000001002c3480 0000000000000008 000000000000009d 0000000000000000 0000000000000001 80000000ffffe0b8 000000000000000d 0000000000000033 0000000007ec0000 13bbf50562dad831 9000000005140748 0000000000000000 9000000004f79508 0000000000000004 0000000000000000 9000000005140748 90000001002bad40 0000000000000000 90000001002ba400 0000000000000000 9000000003573ec8 0000000000000000 00000000000000b0 0000000000000004 0000000000000000 0000000000070000 ... Call Trace: [<9000000003573ec8>] show_stack+0x38/0x150 [<9000000004893670>] dump_stack_lvl+0x74/0xa8 [<900000000360d2bc>] lockdep_rcu_suspicious+0x14c/0x190 [<900000000361235c>] __lock_acquire+0xd0c/0x2740 [<90000000036146f4>] lock_acquire+0x104/0x2c0 [<90000000048a955c>] _raw_spin_lock_irqsave+0x5c/0x90 [<900000000381cd5c>] rmqueue_bulk+0x6c/0x950 [<900000000381fc0c>] get_page_from_freelist+0xd4c/0x1790 [<9000000003821c6c>] __alloc_pages+0x1bc/0x3e0 [<9000000003583b40>] tlb_init+0x150/0x2a0 [<90000000035742a0>] per_cpu_trap_init+0xf0/0x110 [<90000000035712fc>] cpu_probe+0x3dc/0x7a0 [<900000000357ed20>] start_secondary+0x40/0xb0 [<9000000004897138>] smpboot_entry+0x54/0x58 raw_smp_processor_id() is required in order to avoid calling into lockdep before RCU has declared the CPU to be watched for readers. See also commit 29368e0939 ("x86/smpboot: Move rcu_cpu_starting() earlier"), commit de5d9dae15 ("s390/smp: move rcu_cpu_starting() earlier") and commit 99f070b623 ("powerpc/smp: Call rcu_cpu_starting() earlier"). Signed-off-by: Huacai Chen <chenhuacai@loongson.cn> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2024-01-31 16:18:57 -08:00
..
alpha	rtc: Add support for configuring the UIP timeout for RTC reads	2024-01-31 16:18:56 -08:00
arc	ARC: fix smatch warning	2024-01-20 11:51:44 +01:00
arm	ARM: dts: qcom: sdx55: fix USB SS wakeup	2024-01-31 16:18:54 -08:00
arm64	arm64: entry: fix ARM64_WORKAROUND_SPECULATIVE_UNPRIV_LOAD	2024-01-31 16:18:55 -08:00
csky	csky: fix arch_jump_label_transform_static override	2024-01-25 15:35:18 -08:00
hexagon	Add x86 shadow stack support	2023-08-31 12:20:12 -07:00
ia64	cpu-hotplug: Provide prototypes for arch CPU registration	2023-10-11 14:27:37 +02:00
loongarch	LoongArch/smp: Call rcutree_report_cpu_starting() earlier	2024-01-31 16:18:57 -08:00
m68k	ata changes for 6.6	2023-09-05 12:37:28 -07:00
microblaze	Microblaze patches for 6.6-rc1	2023-09-05 10:15:22 -07:00
mips	mips: Fix max_mapnr being uninitialized on early stages	2024-01-31 16:18:52 -08:00
nios2	Add x86 shadow stack support	2023-08-31 12:20:12 -07:00
openrisc	OpenRISC updates for 6.6	2023-09-05 10:09:31 -07:00
parisc	parisc/firmware: Fix F-extend for PDC addresses	2024-01-31 16:18:52 -08:00
powerpc	powerpc/ps3_defconfig: Disable PPC64_BIG_ENDIAN_ELF_ABI_V2	2024-01-31 16:18:49 -08:00
riscv	riscv: mm: Fixup compat mode boot failure	2024-01-31 16:18:55 -08:00
s390	crypto: s390/aes - Fix buffer overread in CTR mode	2024-01-31 16:18:50 -08:00
sh	sh: ecovec24: Rename missed backlight field from fbdev to dev	2024-01-31 16:18:48 -08:00
sparc	sparc32: fix a braino in fault handling in csum_and_copy_..._user()	2023-10-27 20:06:06 -04:00
um	um: virt-pci: fix platform map offset	2024-01-25 15:35:50 -08:00
x86	rtc: Extend timeout for waiting for UIP to clear to 1s	2024-01-31 16:18:56 -08:00
xtensa	xtensa: boot/lib: fix function prototypes	2023-09-20 05:03:30 -07:00
.gitignore	…
Kconfig	Add x86 shadow stack support	2023-08-31 12:20:12 -07:00