Qian Cai 6ad326ea7b arm64/smp: Move rcu_cpu_starting() earlier ... [ Upstream commit ce3d31ad3cac765484463b4f5a0b6b1f8f1a963e ] The call to rcu_cpu_starting() in secondary_start_kernel() is not early enough in the CPU-hotplug onlining process, which results in lockdep splats as follows: WARNING: suspicious RCU usage ----------------------------- kernel/locking/lockdep.c:3497 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 no locks held by swapper/1/0. Call trace: dump_backtrace+0x0/0x3c8 show_stack+0x14/0x60 dump_stack+0x14c/0x1c4 lockdep_rcu_suspicious+0x134/0x14c __lock_acquire+0x1c30/0x2600 lock_acquire+0x274/0xc48 _raw_spin_lock+0xc8/0x140 vprintk_emit+0x90/0x3d0 vprintk_default+0x34/0x40 vprintk_func+0x378/0x590 printk+0xa8/0xd4 __cpuinfo_store_cpu+0x71c/0x868 cpuinfo_store_cpu+0x2c/0xc8 secondary_start_kernel+0x244/0x318 This is avoided by moving the call to rcu_cpu_starting up near the beginning of the secondary_start_kernel() function. Signed-off-by: Qian Cai <cai@redhat.com> Acked-by: Paul E. McKenney <paulmck@kernel.org> Link: https://lore.kernel.org/lkml/160223032121.7002.1269740091547117869.tip-bot2@tip-bot2/ Link: https://lore.kernel.org/r/20201028182614.13655-1-cai@redhat.com Signed-off-by: Will Deacon <will@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-03-16 16:40:27 +08:00
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alpha	alpha: fix annotation of io{read,write}{16,32}be()	2021-03-16 16:34:34 +08:00
arc	ARC: perf: redo the pct irq missing in device-tree handling	2021-03-16 16:40:09 +08:00
arm	ARM: dts: sun4i-a10: fix cpu_alert temperature	2021-03-16 16:40:24 +08:00
arm64	arm64/smp: Move rcu_cpu_starting() earlier	2021-03-16 16:40:27 +08:00
c6x	Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces.	2021-03-16 11:01:34 +08:00
csky	csky: Fixup abiv2 syscall_trace break a4 & a5	2021-03-16 16:28:56 +08:00
h8300	Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces.	2021-03-16 11:01:34 +08:00
hexagon	hexagon: define ioremap_uc	2021-03-16 16:27:29 +08:00
ia64	ia64: fix build error with !COREDUMP	2021-03-16 16:40:09 +08:00
m68k	m68k: q40: Fix info-leak in rtc_ioctl	2021-03-16 16:36:33 +08:00
microblaze	Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces.	2021-03-16 11:01:34 +08:00
mips	MIPS: DEC: Restore bootmem reservation for firmware working memory area	2021-03-16 16:40:05 +08:00
nds32	Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces.	2021-03-16 11:01:34 +08:00
nios2	Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces.	2021-03-16 11:01:34 +08:00
openrisc	openrisc: Fix issue with get_user for 64-bit values	2021-03-16 16:39:36 +08:00
parisc	kbuild: fix broken builds because of GZIP,BZIP2,LZOP variables	2021-03-16 16:35:20 +08:00
powerpc	powerpc: Fix undetected data corruption with P9N DD2.1 VSX CI load emulation	2021-03-16 16:40:06 +08:00
riscv	riscv: Define AT_VECTOR_SIZE_ARCH for ARCH_DLINFO	2021-03-16 16:39:46 +08:00
s390	s390/stp: add locking to sysfs functions	2021-03-16 16:40:05 +08:00
sh	sh: landisk: Add missing initialization of sh_io_port_base	2021-03-16 16:34:22 +08:00
sparc	sparc64: remove mm_cpumask clearing to fix kthread_use_mm race	2021-03-16 16:39:40 +08:00
um	um: change sigio_spinlock to a mutex	2021-03-16 16:39:41 +08:00
unicore32	Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces.	2021-03-16 11:01:34 +08:00
x86	x86/kexec: Use up-to-dated screen_info copy to fill boot params	2021-03-16 16:40:24 +08:00
xtensa	xtensa: fix system_call interaction with ptrace	2021-03-16 16:36:42 +08:00
.gitignore	Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces.	2021-03-16 11:01:34 +08:00
Kconfig	mm: fix exec activate_mm vs TLB shootdown and lazy tlb switching race	2021-03-16 16:39:40 +08:00