Will Deacon b4aecf7808 arm64: hibernate: Avoid sending cross-calling with interrupts disabled ... Since commit 3b8c9f1cdf ("arm64: IPI each CPU after invalidating the I-cache for kernel mappings"), a call to flush_icache_range() will use an IPI to cross-call other online CPUs so that any stale instructions are flushed from their pipelines. This triggers a WARN during the hibernation resume path, where flush_icache_range() is called with interrupts disabled and is therefore prone to deadlock: | Disabling non-boot CPUs ... | CPU1: shutdown | psci: CPU1 killed. | CPU2: shutdown | psci: CPU2 killed. | CPU3: shutdown | psci: CPU3 killed. | WARNING: CPU: 0 PID: 1 at ../kernel/smp.c:416 smp_call_function_many+0xd4/0x350 | Modules linked in: | CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.20.0-rc4 #1 Since all secondary CPUs have been taken offline prior to invalidating the I-cache, there's actually no need for an IPI and we can simply call __flush_icache_range() instead. Cc: <stable@vger.kernel.org> Fixes: 3b8c9f1cdf ("arm64: IPI each CPU after invalidating the I-cache for kernel mappings") Reported-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com> Tested-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com> Tested-by: James Morse <james.morse@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>		2018-12-07 15:52:39 +00:00
..
boot	Removal of vdd_log regulator on rk960 to fix a stability issue	2018-11-30 11:50:14 -08:00
configs	arm64: defconfig: Enable some IPMI configs	2018-11-02 11:39:50 -07:00
crypto	crypto: arm64/aes-blk - ensure XTS mask is always loaded	2018-10-12 14:20:45 +08:00
include	arm64: ftrace: Fix to enable syscall events on arm64	2018-11-29 16:53:10 +00:00
kernel	arm64: hibernate: Avoid sending cross-calling with interrupts disabled	2018-12-07 15:52:39 +00:00
kvm	KVM updates for v4.20	2018-10-25 17:57:35 -07:00
lib	arm64: lib: use C string functions with KASAN enabled	2018-10-26 16:25:18 -07:00
mm	arm64: memblock: don't permit memblock resizing until linear mapping is up	2018-11-08 17:54:03 +00:00
net	bpf, arm64: fix getting subprog addr from aux for calls	2018-11-26 17:34:24 -08:00
xen	arm64: mm: Add additional parameter to uaccess_ttbr0_disable	2018-01-17 13:57:49 +01:00
Kconfig	arm64: Add workaround for Cortex-A76 erratum 1286807	2018-11-29 16:45:45 +00:00
Kconfig.debug	Kconfig: consolidate the "Kernel hacking" menu	2018-08-02 08:06:48 +09:00
Kconfig.platforms	ARM: SoC platform updates for 4.20	2018-10-29 15:37:33 -07:00
Makefile	arm64 2nd round of updates for 4.20:	2018-11-03 10:55:23 -07:00