Russell Currey 2935443dc9 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>		2023-09-19 12:22:42 +02:00
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governors	cpuidle: teo: Rename two local variables in teo_select()	2021-08-03 15:18:57 +02:00
Kconfig	…
Kconfig.arm	cpuidle: Fix ARM_QCOM_SPM_CPUIDLE configuration	2021-04-08 19:54:14 +02:00
Kconfig.mips	…
Kconfig.powerpc	…
Makefile	…
coupled.c	smp: Cleanup smp_call_function*()	2020-11-24 16:47:49 +01:00
cpuidle-arm.c	…
cpuidle-at91.c	…
cpuidle-big_little.c	cpuidle: big.LITTLE: enable driver only on Peach-Pit/Pi Chromebooks	2020-10-26 10:15:24 +01:00
cpuidle-calxeda.c	…
cpuidle-clps711x.c	…
cpuidle-cps.c	…
cpuidle-exynos.c	…
cpuidle-haltpoll.c	…
cpuidle-kirkwood.c	…
cpuidle-mvebu-v7.c	…
cpuidle-powernv.c	powerpc/powernv/idle: add a basic stop 0-3 driver for POWER10	2020-09-15 22:13:38 +10:00
cpuidle-psci-domain.c	cpuidle: psci: Iterate backwards over list in psci_pd_remove()	2023-03-22 13:31:36 +01:00
cpuidle-psci.c	cpuidle: PSCI: Improve support for suspend-to-RAM for PSCI OSI mode	2022-06-09 10:22:33 +02:00
cpuidle-psci.h	cpuidle: psci: Fix error path via converting to a platform driver	2020-07-29 18:38:30 +02:00
cpuidle-pseries.c	powerpc/pseries: Rework lppaca_shared_proc() to avoid DEBUG_PREEMPT	2023-09-19 12:22:42 +02:00
cpuidle-qcom-spm.c	cpuidle: qcom: Add SPM register data for MSM8226	2021-06-16 20:03:26 +02:00
cpuidle-tegra.c	cpuidle: tegra: Remove do_idle firmware call	2021-04-08 19:54:14 +02:00
cpuidle-ux500.c	mfd/cpuidle: ux500: Rename driver symbol	2021-08-16 13:42:34 +01:00
cpuidle-zynq.c	…
cpuidle.c	cpuidle: Select polling interval based on a c-state with a longer target residency	2020-12-01 17:59:18 +01:00
cpuidle.h	…
driver.c	cpuidle: Use s64 as exit_latency_ns and target_residency_ns data type	2021-04-07 19:26:44 +02:00
dt_idle_states.c	cpuidle: dt: Return the correct numbers of parsed idle states	2022-12-31 13:14:01 +01:00
dt_idle_states.h	…
governor.c	…
poll_state.c	…
sysfs.c	cpuidle: Fix kobject memory leaks in error paths	2021-11-18 19:16:29 +01:00