40 lines
1.4 KiB
Diff
40 lines
1.4 KiB
Diff
From 6257ff8ac1a1f91acb3fec23d6757d572a39ec5a Mon Sep 17 00:00:00 2001
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From: Thomas Gleixner <tglx@linutronix.de>
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Date: Wed, 14 Dec 2011 01:03:49 +0100
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Subject: [PATCH 249/290] cpumask: Disable CONFIG_CPUMASK_OFFSTACK for RT
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We can't deal with the cpumask allocations which happen in atomic
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context (see arch/x86/kernel/apic/io_apic.c) on RT right now.
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Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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---
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arch/x86/Kconfig | 2 +-
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lib/Kconfig | 1 +
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2 files changed, 2 insertions(+), 1 deletion(-)
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diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
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index e084a73..c42146e 100644
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--- a/arch/x86/Kconfig
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+++ b/arch/x86/Kconfig
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@@ -730,7 +730,7 @@ config IOMMU_HELPER
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config MAXSMP
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bool "Enable Maximum number of SMP Processors and NUMA Nodes"
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depends on X86_64 && SMP && DEBUG_KERNEL && EXPERIMENTAL
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- select CPUMASK_OFFSTACK
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+ select CPUMASK_OFFSTACK if !PREEMPT_RT_FULL
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---help---
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Enable maximum number of CPUS and NUMA Nodes for this architecture.
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If unsure, say N.
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diff --git a/lib/Kconfig b/lib/Kconfig
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index 32f3e5a..63d81e8 100644
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--- a/lib/Kconfig
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+++ b/lib/Kconfig
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@@ -231,6 +231,7 @@ config CHECK_SIGNATURE
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config CPUMASK_OFFSTACK
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bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS
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+ depends on !PREEMPT_RT_FULL
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help
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Use dynamic allocation for cpumask_var_t, instead of putting
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them on the stack. This is a bit more expensive, but avoids
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