From mboxrd@z Thu Jan 1 00:00:00 1970 From: will.deacon@arm.com (Will Deacon) Date: Thu, 16 Aug 2018 11:22:20 +0100 Subject: AArch64 boot failure on Hikey960 on latest master after "arm64: insn: Don't fallback on nosync path for general insn patching" In-Reply-To: <462f8ae6-9948-a8e5-7504-623d40344336@iki.fi> References: <462f8ae6-9948-a8e5-7504-623d40344336@iki.fi> Message-ID: <20180816102219.GF31093@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi Tuomas, [+John] On Thu, Aug 16, 2018 at 02:38:51AM +0300, Tuomas Tynkkynen wrote: > Booting Linus's master of today with the usual arm64 defconfig fails for > me on the Hikey960 board. I've bisected it down to: > > commit 693350a7998018391852c48f68956cf0f855b2b9 (HEAD, refs/bisect/bad) > Author: Will Deacon > Date: Tue Jun 19 17:55:28 2018 +0100 > > arm64: insn: Don't fallback on nosync path for general insn patching > > Here's the boot log with earlycon enabled after which the boot hangs: Thanks for the boot log, that's really helpful. Please can you try the diff below? Out of interest -- do you know if Hikey960 is used by any boot-testing farms? The patch above has been in linux-next for ages, but we didn't see any complaints until it hit mainline :( Cheers, Will --->8 diff --git a/arch/arm64/kernel/jump_label.c b/arch/arm64/kernel/jump_label.c index c2dd1ad3e648..e0756416e567 100644 --- a/arch/arm64/kernel/jump_label.c +++ b/arch/arm64/kernel/jump_label.c @@ -36,7 +36,7 @@ void arch_jump_label_transform(struct jump_entry *entry, insn = aarch64_insn_gen_nop(); } - aarch64_insn_patch_text(&addr, &insn, 1); + aarch64_insn_patch_text_nosync(addr, insn); } void arch_jump_label_transform_static(struct jump_entry *entry,