Russell Currey 4c8568cf4c powerpc/pseries: Rework lppaca_shared_proc() to avoid DEBUG_PREEMPT ... [ Upstream commit eac030b22e ] lppaca_shared_proc() takes a pointer to the lppaca which is typically accessed through get_lppaca(). With DEBUG_PREEMPT enabled, this leads to checking if preemption is enabled, for example: BUG: using smp_processor_id() in preemptible [00000000] code: grep/10693 caller is lparcfg_data+0x408/0x19a0 CPU: 4 PID: 10693 Comm: grep Not tainted 6.5.0-rc3 #2 Call Trace: dump_stack_lvl+0x154/0x200 (unreliable) check_preemption_disabled+0x214/0x220 lparcfg_data+0x408/0x19a0 ... This isn't actually a problem however, as it does not matter which lppaca is accessed, the shared proc state will be the same. vcpudispatch_stats_procfs_init() already works around this by disabling preemption, but the lparcfg code does not, erroring any time /proc/powerpc/lparcfg is accessed with DEBUG_PREEMPT enabled. Instead of disabling preemption on the caller side, rework lppaca_shared_proc() to not take a pointer and instead directly access the lppaca, bypassing any potential preemption checks. Fixes: f13c13a005 ("powerpc: Stop using non-architected shared_proc field in lppaca") Signed-off-by: Russell Currey <ruscur@russell.cc> [mpe: Rework to avoid needing a definition in paca.h and lppaca.h] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230823055317.751786-4-mpe@ellerman.id.au Signed-off-by: Sasha Levin <sashal@kernel.org>		2023-09-13 09:42:48 +02:00
..
governors	cpuidle: haltpoll: Add trace points for guest_halt_poll_ns grow/shrink	2022-06-14 16:01:35 +02:00
coupled.c	cpuidle: coupled: Drop duplicate word from a comment	2022-08-31 20:54:01 +02:00
cpuidle-arm.c
cpuidle-at91.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_56.RULE (part 2)	2022-06-10 14:51:35 +02:00
cpuidle-big_little.c
cpuidle-calxeda.c
cpuidle-clps711x.c
cpuidle-cps.c
cpuidle-exynos.c
cpuidle-haltpoll.c
cpuidle-kirkwood.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_56.RULE (part 2)	2022-06-10 14:51:35 +02:00
cpuidle-mvebu-v7.c
cpuidle-powernv.c	cpuidle: powernv: move from strlcpy() with unused retval to strscpy()	2022-08-31 21:09:54 +02:00
cpuidle-psci-domain.c	cpuidle: psci: Move enabling OSI mode after power domains creation	2023-08-23 17:52:17 +02:00
cpuidle-psci.c	context_tracking: Take IRQ eqs entrypoints over RCU	2022-07-05 13:32:59 -07:00
cpuidle-psci.h
cpuidle-pseries.c	powerpc/pseries: Rework lppaca_shared_proc() to avoid DEBUG_PREEMPT	2023-09-13 09:42:48 +02:00
cpuidle-qcom-spm.c
cpuidle-riscv-sbi.c	RISC-V: Align SBI probe implementation with spec	2023-05-11 23:03:04 +09:00
cpuidle-tegra.c
cpuidle-ux500.c
cpuidle-zynq.c
cpuidle.c	More power management updates for 5.20-rc1	2022-08-08 14:29:00 -07:00
cpuidle.h
driver.c
dt_idle_genpd.c	cpuidle: dt_idle_genpd: Add helper function to remove genpd topology	2023-08-16 18:27:22 +02:00
dt_idle_genpd.h	cpuidle: dt_idle_genpd: Add helper function to remove genpd topology	2023-08-16 18:27:22 +02:00
dt_idle_states.c	cpuidle: dt: Return the correct numbers of parsed idle states	2022-12-31 13:31:55 +01:00
dt_idle_states.h
governor.c	cpuidle: Remove redundant check in cpuidle_switch_governor()	2022-09-03 20:14:51 +02:00
Kconfig
Kconfig.arm	cpuidle: add ARCH_SUSPEND_POSSIBLE dependencies	2023-03-10 09:34:22 +01:00
Kconfig.mips
Kconfig.powerpc
Kconfig.riscv
Makefile
poll_state.c
sysfs.c