kernel/lib-cpumask-Make-CPUMASK_OFFSTACK-usable-without-deb.patch
2015-04-20 20:37:31 -04:00

38 lines
1.2 KiB
Diff

From: Josh Boyer <jwboyer@fedoraproject.org>
Date: Mon, 11 Nov 2013 08:39:16 -0500
Subject: [PATCH] lib/cpumask: Make CPUMASK_OFFSTACK usable without debug
dependency
When CPUMASK_OFFSTACK was added in 2008, it was dependent upon
DEBUG_PER_CPU_MAPS being enabled, or an architecture could select it.
The debug dependency adds additional overhead that isn't required for
operation of the feature, and we need CPUMASK_OFFSTACK to increase the
NR_CPUS value beyond 512 on x86. We drop the current dependency and make
sure SMP is set.
Bugzilla: N/A
Upstream-status: Nak'd, supposedly replacement coming to auto-select
Signed-off-by: Josh Boyer <jwboyer@fedoraproject.org>
---
lib/Kconfig | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/lib/Kconfig b/lib/Kconfig
index 601965a948e8..028213cf0e4d 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -390,7 +390,8 @@ config CHECK_SIGNATURE
bool
config CPUMASK_OFFSTACK
- bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS
+ bool "Force CPU masks off stack"
+ depends on SMP
help
Use dynamic allocation for cpumask_var_t, instead of putting
them on the stack. This is a bit more expensive, but avoids
--
2.1.0