On Thu, Jul 14, 2022 at 04:41:34PM +0800, Huacai Chen wrote: > When CONFIG_CPUMASK_OFFSTACK and CONFIG_DEBUG_PER_CPU_MAPS is selected, > cpu_max_bits_warn() generates a runtime warning similar as below while > we show /proc/cpuinfo. Fix this by using nr_cpu_ids (the runtime limit) > instead of NR_CPUS to iterate CPUs. > > [ 3.052463] ------------[ cut here ]------------ > [ 3.059679] WARNING: CPU: 3 PID: 1 at include/linux/cpumask.h:108 show_cpuinfo+0x5e8/0x5f0 > [ 3.070072] Modules linked in: efivarfs autofs4 > [ 3.076257] CPU: 0 PID: 1 Comm: systemd Not tainted 5.19-rc5+ #1052 > [ 3.084034] Hardware name: Loongson Loongson-3A4000-7A1000-1w-V0.1-CRB/Loongson-LS3A4000-7A1000-1w-EVB-V1.21, BIOS Loongson-UDK2018-V2.0.04082-beta7 04/27 > [ 3.099465] Stack : 9000000100157b08 9000000000f18530 9000000000cf846c 9000000100154000 > [ 3.109127] 9000000100157a50 0000000000000000 9000000100157a58 9000000000ef7430 > [ 3.118774] 90000001001578e8 0000000000000040 0000000000000020 ffffffffffffffff > [ 3.128412] 0000000000aaaaaa 1ab25f00eec96a37 900000010021de80 900000000101c890 > [ 3.138056] 0000000000000000 0000000000000000 0000000000000000 0000000000aaaaaa > [ 3.147711] ffff8000339dc220 0000000000000001 0000000006ab4000 0000000000000000 > [ 3.157364] 900000000101c998 0000000000000004 9000000000ef7430 0000000000000000 > [ 3.167012] 0000000000000009 000000000000006c 0000000000000000 0000000000000000 > [ 3.176641] 9000000000d3de08 9000000001639390 90000000002086d8 00007ffff0080286 > [ 3.186260] 00000000000000b0 0000000000000004 0000000000000000 0000000000071c1c > [ 3.195868] ... > [ 3.199917] Call Trace: > [ 3.203941] [<98000000002086d8>] show_stack+0x38/0x14c > [ 3.210666] [<9800000000cf846c>] dump_stack_lvl+0x60/0x88 > [ 3.217625] [<980000000023d268>] __warn+0xd0/0x100 > [ 3.223958] [<9800000000cf3c90>] warn_slowpath_fmt+0x7c/0xcc > [ 3.231150] [<9800000000210220>] show_cpuinfo+0x5e8/0x5f0 > [ 3.238080] [<98000000004f578c>] seq_read_iter+0x354/0x4b4 > [ 3.245098] [<98000000004c2e90>] new_sync_read+0x17c/0x1c4 > [ 3.252114] [<98000000004c5174>] vfs_read+0x138/0x1d0 > [ 3.258694] [<98000000004c55f8>] ksys_read+0x70/0x100 > [ 3.265265] [<9800000000cfde9c>] do_syscall+0x7c/0x94 > [ 3.271820] [<9800000000202fe4>] handle_syscall+0xc4/0x160 > [ 3.281824] ---[ end trace 8b484262b4b8c24c ]--- > > Cc: stable@xxxxxxxxxxxxxxx > Signed-off-by: Huacai Chen <chenhuacai@xxxxxxxxxxx> > --- > arch/mips/kernel/proc.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) applied to mips-next. Thomas. -- Crap can work. Given enough thrust pigs will fly, but it's not necessarily a good idea. [ RFC1925, 2.3 ]
