The linux-next commit "ftrace: Rework event_create_dir()” [1] triggers boot warnings for Clang-build (Clang version 8.0.1) kernels (reproduced on both arm64 and powerpc). Reverted it (with trivial conflict fixes) on the top of today’s linux-next fixed the issue.
configs: https://raw.githubusercontent.com/cailca/linux-mm/master/arm64.config https://raw.githubusercontent.com/cailca/linux-mm/master/powerpc.config [1] https://lore.kernel.org/lkml/20191111132458.342979...@infradead.org/ [ 115.799327][ T1] Registered efivars operations [ 115.849770][ T1] clocksource: Switched to clocksource arch_sys_counter [ 115.901145][ T1] Could not initialize trace point events/sys_enter_rt_sigreturn [ 115.908854][ T1] Could not create directory for event sys_enter_rt_sigreturn [ 115.998949][ T1] Could not initialize trace point events/sys_enter_restart_syscall [ 116.006802][ T1] Could not create directory for event sys_enter_restart_syscall [ 116.062702][ T1] Could not initialize trace point events/sys_enter_getpid [ 116.069828][ T1] Could not create directory for event sys_enter_getpid [ 116.078058][ T1] Could not initialize trace point events/sys_enter_gettid [ 116.085181][ T1] Could not create directory for event sys_enter_gettid [ 116.093405][ T1] Could not initialize trace point events/sys_enter_getppid [ 116.100612][ T1] Could not create directory for event sys_enter_getppid [ 116.108989][ T1] Could not initialize trace point events/sys_enter_getuid [ 116.116058][ T1] Could not create directory for event sys_enter_getuid [ 116.124250][ T1] Could not initialize trace point events/sys_enter_geteuid [ 116.131457][ T1] Could not create directory for event sys_enter_geteuid [ 116.139840][ T1] Could not initialize trace point events/sys_enter_getgid [ 116.146908][ T1] Could not create directory for event sys_enter_getgid [ 116.155163][ T1] Could not initialize trace point events/sys_enter_getegid [ 116.162370][ T1] Could not create directory for event sys_enter_getegid [ 116.178015][ T1] Could not initialize trace point events/sys_enter_setsid [ 116.185138][ T1] Could not create directory for event sys_enter_setsid [ 116.269307][ T1] Could not initialize trace point events/sys_enter_sched_yield [ 116.276811][ T1] Could not create directory for event sys_enter_sched_yield [ 116.527652][ T1] Could not initialize trace point events/sys_enter_munlockall [ 116.535126][ T1] Could not create directory for event sys_enter_munlockall [ 116.622096][ T1] Could not initialize trace point events/sys_enter_vhangup [ 116.629307][ T1] Could not create directory for event sys_enter_vhangup [ 116.783867][ T1] Could not initialize trace point events/sys_enter_sync [ 116.790819][ T1] Could not create directory for event sys_enter_sync [ 117.723402][ T1] pnp: PnP ACPI init [ 117.736379][ T1] system 00:00: [mem 0x30000000-0x3fffffff window] could not be reserved [ 126.020353][ T1] pnp: PnP ACPI: found 1 devices [ 126.093919][ T1] NET: Registered protocol family 2 [ 126.180007][ T1] tcp_listen_portaddr_hash hash table entries: 65536 (order: 6, 4718592 bytes, vmalloc) [ 126.206510][ T1] TCP established hash table entries: 524288 (order: 6, 4194304 bytes, vmalloc) [ 126.227766][ T1] TCP bind hash table entries: 65536 (order: 6, 4194304 bytes, vmalloc) [ 126.240146][ T1] TCP: Hash tables configured (established 524288 bind 65536)
