Vineet Gupta b184e98008 ARC: stack unwinding: don't assume non-current task is sleeping ... [ Upstream commit e42404fa10 ] To start stack unwinding (SP, PC and BLINK) are needed. When the explicit execution context (pt_regs etc) is not available, unwinder assumes the task is sleeping (in __switch_to()) and fetches SP and BLINK from kernel mode stack. But this assumption is not true, specially in a SMP system, when top runs on 1 core, there may be active running processes on all cores. So when unwinding non courrent tasks, ensure they are NOT running. And while at it, handle the self unwinding case explicitly. This came out of investigation of a customer reported hang with rcutorture+top Link: https://github.com/foss-for-synopsys-dwc-arc-processors/linux/issues/31 Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2020-12-16 10:56:55 +01:00
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boot	ARC: [dts] fix the errors detected by dtbs_check	2020-11-05 11:43:19 +01:00
configs	ARC: [plat-hsdk]: Enable on-boardi SPI ADC IC	2019-10-22 09:58:29 -07:00
include	arch: pgtable: define MAX_POSSIBLE_PHYSMEM_BITS where needed	2020-12-02 08:49:50 +01:00
kernel	ARC: stack unwinding: don't assume non-current task is sleeping	2020-12-16 10:56:55 +01:00
lib	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
mm	dma-mapping updates for 5.4:	2019-09-19 13:27:23 -07:00
oprofile	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
plat-axs10x	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
plat-eznps	irqchip/eznps: Fix build error for !ARC700 builds	2020-09-17 13:47:47 +02:00
plat-hsdk	arc: plat-hsdk: fix kconfig dependency warning when !RESET_CONTROLLER	2020-10-29 09:57:47 +01:00
plat-sim	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
plat-tb10x	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333	2019-06-05 17:37:06 +02:00
Kbuild	treewide: Add SPDX license identifier - Kbuild	2019-05-30 11:32:33 -07:00
Kconfig	dma-mapping updates for Linux 5.3	2019-07-12 15:13:55 -07:00
Kconfig.debug	Kconfig: consolidate the "Kernel hacking" menu	2018-08-02 08:06:48 +09:00
Makefile	kbuild,arc: add CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3 for ARC	2019-09-04 10:01:17 +09:00