FYI, we noticed the below changes on
https://git.kernel.org/pub/scm/linux/kernel/git/luto/linux.git x86/pcid
commit d9da2c95d77fd14360cd902ff1bc3859452bb5bc ("x86/mm: If INVPCID is available, use it to flush global mappings")
[ 0.000000] BRK [0x0355d000, 0x0355dfff] PGTABLE
[ 0.000000] BRK [0x0355e000, 0x0355efff] PGTABLE
[ 0.000000] ------------[ cut here ]------------
[ 0.000000] WARNING: CPU: 0 PID: 0 at arch/x86/kernel/cpu/common.c:1498 warn_pre_alternatives+0x1c/0x1e()
[ 0.000000] You're using static_cpu_has before alternatives have run!
[ 0.000000] Modules linked in:
[ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 4.4.0-rc5-00003-gd9da2c9 #1
[ 0.000000] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014
[ 0.000000] 0000000000000000 ffffffff81a03c80 ffffffff81267ba8 ffffffff81a03cb8
[ 0.000000] ffffffff81057366 ffffffff8100eb09 ffff88000355cff8 0000007fc0000000
[ 0.000000] 0000000000100000 0000008000000000 ffffffff81a03d20 ffffffff810573c2
[ 0.000000] Call Trace:
[ 0.000000] [<ffffffff81267ba8>] dump_stack+0x19/0x1b
[ 0.000000] [<ffffffff81057366>] warn_slowpath_common+0x89/0xa2
[ 0.000000] [<ffffffff8100eb09>] ? warn_pre_alternatives+0x1c/0x1e
[ 0.000000] [<ffffffff810573c2>] warn_slowpath_fmt+0x43/0x4b
[ 0.000000] [<ffffffff8100eb09>] warn_pre_alternatives+0x1c/0x1e
[ 0.000000] [<ffffffff8102cd04>] native_flush_tlb_global+0x31/0x5e
[ 0.000000] [<ffffffff814d5f89>] ? _raw_spin_unlock+0x22/0x2b
[ 0.000000] [<ffffffff814ceeae>] phys_pud_init+0x287/0x2af
[ 0.000000] [<ffffffff814cf0a2>] kernel_physical_mapping_init+0x10b/0x1bd
[ 0.000000] [<ffffffff814ccbb7>] init_memory_mapping+0x24b/0x2e8
[ 0.000000] [<ffffffff81add18a>] init_mem_mapping+0x118/0x21f
[ 0.000000] [<ffffffff81acf10f>] setup_arch+0x65a/0xb6a
[ 0.000000] [<ffffffff812685f1>] ? idr_init+0x27/0x29
[ 0.000000] [<ffffffff81acbb86>] start_kernel+0xce/0x42e
[ 0.000000] [<ffffffff81acb120>] ? early_idt_handler_array+0x120/0x120
[ 0.000000] [<ffffffff81acb315>] x86_64_start_reservations+0x2a/0x2c
[ 0.000000] [<ffffffff81acb3fc>] x86_64_start_kernel+0xe5/0xf2
[ 0.000000] ---[ end trace 44e73404887f7749 ]---
[ 0.000000] ------------[ cut here ]------------
Thanks,
Kernel Test Robot